Relevant bibliographies by topics / Adsorbant

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Academic literature on the topic 'Adsorbant'

Author: Grafiati
Published: 4 June 2021
Last updated: 20 October 2023

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Journal articles on the topic "Adsorbant"

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Kadhim, Bashar J., Afraa H. Kamel, and Bashir Ahmed. "Optimization of Dye Removal Using Waste Natural Material and Polymer Particles." Journal of Engineering 22, no. 10 (October 1, 2016): 38–51. http://dx.doi.org/10.31026/j.eng.2016.10.03.

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In this paper waste natural material (date seed) and polymer particles(UF) were used for investigation of removal dye of the potassium permanganate. Also study effect some variables such as pH, dye concentration and adsorbent concentration on dye removal. 15 experimental runs were done using the itemized conditions designed established on the Box-Wilson design employed to optimize dye removal. The optimum conditions for the dye removal were found: (pH) 12, (dye con.) 2.38 ppm, (adsorbant con.) 0.0816 gm for date seed with 95.22% removal and for UF (pH) 12, (dye con.) 18 ppm, (adsorbant con.) 0.2235 gm with 91.43%. The value of R-square was 85.47% for Date seed and (88.77%) for UF.
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MEGHANA, P. KARUNASRI, K. VENKATA PRAVALIKA, P. JANAKI SRIRAM, and K. RAVINDHRANATH. "Effective Removal of Hexavalent Chromium from Polluted Water using Phoenix sylvestris Seed Powder as Adsorbent." Asian Journal of Chemistry 31, no. 6 (April 29, 2019): 1327–31. http://dx.doi.org/10.14233/ajchem.2019.21760.

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Phoenix sylvestris seed powder (PSSP) was investigated as an adsorbent for the removal of chromium(VI) ions from water using batch extraction method. The conditions for the maximum extraction were optimized. The adsorption capacity was found to be 22.5 mg/g at pH= 2, contact time: 60 min, PSSP dosage: 0.40 g/500mL, rpm: 300 and temp.: 28 ± 2 ºC and found to be more suitable adsorbant than compared to other reported adsorbents in the literature. Co-ions even in five-fold excess were less interfered. Regeneration studies revealed that Phoenix sylvestris seed powder can be used up to three cycles. The method developed was successfully applied to polluted water/industrial effluents samples.
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Hasanah, Ulfa Imroathul, Budi Utami, and Endang Susilowati. "Combination of Corn Waste and Egg Shell as Zn Metal Adsorbent with Batch System." JKPK (Jurnal Kimia dan Pendidikan Kimia) 7, no. 2 (August 30, 2022): 223. http://dx.doi.org/10.20961/jkpk.v7i2.55440.

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<p>This study aims to determine: the ability of corn cobs and eggshells as Zn metal adsorbents, functional groups of corn cobs and eggshells adsorbent, what isotherm patterns occur in the adsorbent corn cobs and eggshells in adsorbing Zn metal, the optimum ratio and optimum mass of the adsorbent composition of corn cobs and eggshells in Zn metal adsorption, the optimum contact time for adsorbent corn cobs and eggshell in adsorbing Zn metal, the optimum concentration of adsorbate to be adsorbed by corn cobs and eggshell adsorbents. This study used an experimental method in the laboratory. characterization includes functional groups using FTIR, and test the effectiveness of adsorbents using the AAS instrument. Kinetic analysis of adsorbent by adsorption isotherm with Langmuir isotherm, Freundlich isotherm, Temkin isotherm, and dubinin-radushkevivh isotherm. The results showed that: Corn cobs and eggshells can be used as zinc metal adsorbents; in the corn cobs adsorbent, there is a functional group -OH at wave number 3415,15 cm<sup>-1</sup> and in the eggshell, there is a bent vibration of calcium carbonate at wave number 3400,65 cm<sup>-1</sup>, the adsorption process of Zn metal by adsorbent corn cobs and egg shells follows the Langmuir isotherm pattern (chemical adsorption), the comparison of the optimum composition and mass of the adsorbent corn cobs and eggshells in Zn metal adsorption are 1:2 and 0,15 grams with Zn metal adsorbed by 80,4571%, the optimum contact time for the adsorbent corn cobs and eggshells in adsorbing Zn metal is 90 minutes with the percentage of absorbed Zn metal concentration is 75,5957%, and the optimum concentration of adsorbate for adsorbed by corn cob and eggshell adsorbents is 1 mg/L with adsorbed Zn percentage of 82,8377%.</p>
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Ion, Constantin Sorin, Mihaela Bombos, Rami Doukeh, Gabriel Vasilievici, and Vasile Matei. "Kinetics of 1-dodecanethiol Desulfurization by Reactive Adsorbtion on MgO/dolomite." Revista de Chimie 69, no. 12 (January 15, 2019): 3439–44. http://dx.doi.org/10.37358/rc.18.12.6765.

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Desulfurisation of 1-dodecanethiol was performed by adsorption process on MgO adsorbent. The adsorbant was characterized by determining the adsorption isotherms, specific surface area, pore volume and average pore diameter. Adsorption experiments were performed in continuous system at 300-450�C, 5 atm and volume hourly space velocities of 1�2 h-1. Conversion of 1-dodecanetol increases with increasing temperature and decreasing volume hourly space velocities. It was identified the stage determinant of the process and a kinetic study of the desulfurization process was developed by reactive adsorption of 1-dodecanethiol on a magnesium oxide adsorbent.
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Afrianita, Reri, and Yommi Dewilda. "EFISIENSI DAN KAPASITAS PENYERAPAN FLY ASH SEBAGAI ADSORBEN DALAM PENYISIHAN LOGAM TIMBAL (Pb) LIMBAH CAIR INDUSTRI PERCETAKAN DI KOTA PADANG." Jurnal Dampak 10, no. 1 (January 1, 2013): 1. http://dx.doi.org/10.25077/dampak.10.1.1-10.2013.

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ABSTRAKPenelitian ini bertujuan untuk menentukan kondisi optimum fly ash sebagai adsorben dalam menyisihan logam timbal (Pb). Penelitian adsorpsi dilakukan secara batch dengan menggunakan larutan artifisial Pb dengan variasi diameter adsorben, berat adsorben, waktu kontak dan kecepatan pengadukan. Hasil penelitian diperoleh kondisi optimum untuk setiap variasi parameter adalah diameter adsorben 0,075-0,14 mm, berat adsorben 1 gam, pH adsorbat 4, waktu kontak 60 menit, dan kecepatan pengadukan 120 rpm. Dapat disimpulkan makin kecil adsorben, maka semakin luas permukaan aktif pada adsorben serta kecepatan pengadukan yang rendah menyebabkan kurang efektifnya tumbukan yang terjadi antar adsorben dan adsorbat.Kata kunci: adsorpsi, fly ash, logam timbal (Pb), kondisi optimum.ABSTRACTThe aim of this research is to determine optimum conditionof fly ash as the adsorbent in the removal of lead (Pb) in water. The research was conducted in a batch method by using artificial Pb with different adsorbent diameters, contact times and mixing rates. Result showed the optimum condition of adsorbent diameter was 0.075-0.14 mm with weight of 1 gram, adsorbate pH of 4, contact time of 60 minutes, and the mixing rate of 120 rpm. From this research, it can be concluded that the less of adsorbent size will lead to the larger active surface area and the slower mixing rate will cause to the less effectiveness of adsorbent and adsorbate collision in water.Keywords:adsorption, fly ash, lead (Pb), optimum condition
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Halas, Stanisław, and Tomasz Durakiewicz. "Improved adsorbant trap for gases." Chemical Geology 122, no. 1-4 (May 1995): 271–73. http://dx.doi.org/10.1016/0009-2541(95)00035-k.

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Fiset, J. F., J. F. Blais, R. Ben Cheikh, and R. D. Tyagi. "Revue sur l'enlèvement des métaux des effluents par adsorption sur la sciure et les écorces de bois." Revue des sciences de l'eau 13, no. 3 (April 12, 2005): 325–49. http://dx.doi.org/10.7202/705397ar.

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Les résidus de transformation du bois tels les écorces et la sciure de bois ont été largement étudiés depuis quelques années pour leur propriété d'adsorption et d'enlèvement des métaux toxiques contenus dans les effluents contaminés. En ce qui concerne la sciure de bois, les recherches répertoriées ont porté principalement sur l'utilisation du sapin rouge, du manga, du tilleul, de l'épinette, du pin, du cèdre, du teck, de l'akamatsu et du buna. Pour ce qui est des écorces de bois, plusieurs espèces ont été étudiées, notamment les écorces de pin, de chêne et d'épinette. La présente revue fait le point sur les performances de ces différents adsorbants peu coûteux pour l'adsorption des principaux métaux contaminants (Cd, Cr, Cu, Hg, Ni, Pb et Zn). Les points discutés portent sur les méthodes de préparation (lavage, séchage et tamisage) et de traitement chimique de l'adsorbant (traitement acide ou basique, traitement à la formaldéhyde, phosphatation, carboxylation, sulfoéthylation, carboxyméthylation, etc.), les conditions opératoires utilisées lors de l'adsorption, les modèles thermodynamiques, cinétiques et autres applicables au couple adsorbant-adsorbat, l'effet des principaux paramètres opératoires (temps de contact, pH de traitement, température, concentration d'adsorbant, taille des particules, etc.), les principes et les mécanismes impliqués dans l'élimination des contaminants métalliques par les adsorbants présentés.
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Bariyah, Khoerul, Nuri Andarwulan, and Purwiyatno Hariyadi. "Pengurangan Kadar Digliserida dan Asam Lemak Bebas dalam Minyak Sawit Kasar Menggunakan Adsorben." Agritech 37, no. 1 (March 10, 2017): 49. http://dx.doi.org/10.22146/agritech.17009.

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Indonesia is the world’s largest crude palm oil (CPO) producer and consumer in 2014. Components that affect the quality of CPO are diglycerides (DAGs) and free fatty acids (FFA). DAGs in palm oil are known as the precursor of 3-MCPD esters, while higher content of FFA could influence the oil stability. The contact of CPO with adsorbent could affect the present of DAG and FFA in CPO. The purpose of this study was to determine the best type of adsorbent in reducing DAGs and FFA in CPO with emphasis on the characteristics of the adsorbent and adsorbate. This study was carried out by using three different types of CPO quality and six different types of adsorbent (carbon active, MgO, Magnesol R-60, and 3 types of bleaching earth). The contact process of CPO with different adsorbents were carried out at a temperature of 50-60 °C (without vacuum) for adsorbents selection and 90 °C (under vacuum) for 30 minutes at a dose of adsorbent 1 and 3 %. The contact process of different adsorbents with CPO have not been able to reduce both DAGs and FFA significantly at the non vacuum condition in three differents CPO sample. The combination of MgO and bleaching earth type 1 could reduce FFA up to 70 % reaching the content of 14 % at vacuum conditions, but did not reduce DAGs of CPO. Different CPO quality and adsorbent characteristics will affect the reduction process of FFA and DAGs. ABSTRAKIndonesia merupakan negara produsen sekaligus konsumen minyak sawit kasar (Crude Palm Oil/CPO) terbesar di dunia pada tahun 2014. Salah satu komponen yang mempengaruhi kualitas CPO adalah digliserida (DAG) dan asam lemak bebas (ALB). DAG dalam minyak sawit adalah prekursor pembentuk senyawa karsinogen 3-MCPD ester, sedangkan ALB yang tinggi dapat mempengaruhi stabilitas minyak. Proses kontak adsorben ke dalam CPO akan mempengaruhi keberadaan kedua komponen tersebut. Tujuan penelitian ini adalah untuk menentukan jenis adsorben yang paling baik dalam mengadsorp digliserida dan asam lemak bebas dalam CPO dengan menitikberatkan pada karakteristik adsorben dan adsorbat. Penelitian dilakukan terhadap 3 jenis CPO (nilai ALB: 4, 6, dan 14) dan 6 jenis adsorben (arang aktif, MgO, Magnesol R-60, dan 3 jenis bleaching earth). Proses kontak dilakukan pada suhu 50 – 60 °C (tanpa vakum) untuk seleksi adsorben dan 90 °C (dengan vakum) selama 30 menit dengan dosis adsorben 1 dan 3 %. Proses kontak adsorben pada CPO dengan kondisi adsorpsi tanpa vakum belum dapat menurunkan DAG dan ALB secara signifikan terhadap ketiga jenis CPO. Kombinasi antara adsorben bleaching earth tipe 1 dan MgO dapat menurunkan ALB hingga 70 % pada CPO dengan ALB 14 % pada kondisi vakum, tetapi tidak dapat menurunkan DAG. Karakterisitik CPO dan adsorben mempengaruhi proses reduksi ALB dan DAG.
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Riaz, Nadia, Mohammad Azmi Bustam, Chong Fai Kait, Zakaria B. Man, Muhammad Saqib Khan, Mohd Shariff Azmi, Biruh Shimekit, Sami Ullah, and Ali E. I. Elkhalifah. "Adsorption of Azo Dye Orange II by Supported TiO2: A Review." Applied Mechanics and Materials 625 (September 2014): 770–74. http://dx.doi.org/10.4028/www.scientific.net/amm.625.770.

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The supported TiO2 photocatalyst has been reported for the photodegradation of different organic pollutants. These supported TiO2 photocatalysts include metal and non metal doped TiO2 photocatalysts. The photodegradation can be explained in terms of adsorption. The adsorption of the dye is an significant and obvious parameter in the photodegradation process. The photodegradation is directly related to the adsorbed quantities of the pollutant onto the surface of adsorbant. Adsorption of Orange II, an azo dye has been reported using different adsorbents like fly ash, activated carbon and porous titanium dioxide. This review presents a comparison of maximum adsorption capacities (Qm; mg.g–1) and Langmuir adsorption constant (Kads; L.mg–1) for the adsorbents reported in previous studies.
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Asep Bayu Dani Nandiyanto, Meli Fiandini, Risti Ragadhita, Hanifa Maulani, Muthia Nurbaiti, Abdulkareem Sh. Mahdi Al-Obaidi, Jumril Yunas, and Muhammad Roil Bilad. "Sustainable Biochar Carbon Biosorbent Based on Tamarind (Tamarindusindica L) Seed: Literature Review, Preparation, and Adsorption Isotherm." Journal of Advanced Research in Applied Sciences and Engineering Technology 32, no. 1 (August 19, 2023): 210–26. http://dx.doi.org/10.37934/araset.32.1.210226.

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In the need for a sustainable environment and clean water for assisting sustainable development goals (SDGs) in developing countries, this study demonstrates the way how to produce biochar carbon microparticles from tamarind seed waste and investigates the proposal mechanism during the adsorption by comparing results with ten adsorption isotherm models. In short, carbon microparticles (sizes of 500, 1000, and 2000 m) were prepared by carbonizing saw-milled tamarind seeds at 250 C. The adsorption was evaluated in the batch reactor for adsorbing curcumin (as a model of dye). The models confirmed the formation of a layer with physisorption characteristics and binding energy due to the existence of the Van der Waals force. The adsorption profile was also done by varying adsorbent sizes and initial adsorbate loadings. Small-sized adsorbents gave impacts the improvement of adsorption capacity due to the presence of a larger surface area, a larger number of adsorption sites, and additional adsorbate-adsorbate interaction. Fewer loadings of the adsorbate results in less adsorption efficacy due to the less adsorbate-adsorbent contact and interaction. Understanding the processes happening is beneficial for future advances and applications, such as catalysts and adsorbents, particularly concerning the utilization of carbon materials from organic waste.
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Dissertations / Theses on the topic "Adsorbant"

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Nguemalieu, Kouetcha Daniella. "Adsorption dans un milieu carboné lamellaire nanoporeux : simulation Monte Carlo Grand Canonique, synthèse et caractérisation." Thesis, Orléans, 2017. http://www.theses.fr/2017ORLE2062/document.

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Les carbones désordonnés nanoporeux sont des supports efficaces pour le piégeage de polluants y compris à l’état de traces dans les eaux usées. Le phénomène d’adsorption à l’origine de la rétention des molécules est cependant complexe car dépendant d’une multitude de facteurs : structure, morphologie et charge de la surface carbonée d’une part,taille/forme et polarité de la molécule d’autre part, l’ensemble étant dépendant du pH et de la concentration. Pourune meilleure compréhension du phénomène, il est important de pouvoir étudier séparément certains paramètres.Dans la perspective d’étudier le phénomène d’adsorption en milieu aqueux sur des carbones nanoporeux à structure et morphologie modèle, des structures lamellaires nanoporeuses de type carbone turbostratique ont été générées numériquement en langage C++ avec le calcul de la fonction de distribution radiale ou de paires. L’adsorption gazeuse d’une molécule non polaire ou polaire puis de deux molécules polaires (H2O/CO2) et (H2O/C6H6O)a été simulée par la méthode Grand Canonique Monte Carlo sur ce support modèle (Isotherme d’adsorption,chaleur d’adsorption, densité des molécules adsorbées) en fonction de la température. Les temps de calcul ont été drastiquement diminués en développant des codes parallèles optimisés sous MPI C++. L’influence de la forme etde la distribution en taille des pores a été mise en évidence en simulant l’adsorption sur la structure d’un carbone activé déjà obtenue par reconstruction 3D de type RMC. Enfin, d’un point de vue expérimental, l’intercalation d’ions tetraalkylammonium par voie électrochimique dans des carbones lamellaires (HOPG et graphite) a été explorée en vue d’obtenir des carbones lamellaires nanoporeux (≈1 nm). La structure a été caractérisée par diffraction des rayons X
Disordered nanoporous carbons are the good materials for capturing pollutants, including traces in wastewater. The phenomenon of adsorption at the origin of the retention of molecules is complex. However, depending on a multitude of factors : structure, morphology and loading of the carbonaceous surface, on the one hand, size/shapeand polarity of the molecule, on the other hand, the whole being dependent on pH and concentration. For a better understanding of the phenomenon, it is important to be able to study some parameters separately. In order to study the phenomenon of adsorption in aqueous medium on nanoporous carbons with structure and model morphology, nanoporous slit structures of turbostratic carbon type were generated numerically in C ++ language with thecalculation of the radial distribution function or pairs. The gas adsorption of a nonpolar or polar molecule and then oftwo polar molecules (H2O/CO2) and (H2O/C6H6O) was simulated by Grand Canonical Monte Carlo method on this model support (adsorption isotherm, adsorption heat, density of adsorbed molecules) as a function of temperature.The runtime has been drastically reduced by developing parallel codes optimized under MPI C ++. The influence of the shape and the pore size distribution was demonstrated by simulating the adsorption on the structure of an activated carbon already obtained by 3D reconstruction of the RMC type. Finally, from an experimental point of view, the intercalation of tetraalkylammonium ions electrochemically in slit carbons (HOPG and graphite) was explored in order to obtain nanoporous lamellar carbons ( ≈1 nm). The structure was characterized by X-ray diffraction
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Ho, Ngoc linh. "Captage du CO2 par des solvants physiques confinés dans des materiaux poreux." Thesis, Aix-Marseille 2, 2011. http://www.theses.fr/2011AIX22089.

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Dans ce travail, l’existence et les mécanismes fondamentaux sous-jacents à l’augmentation de la solubilité du CO2 dans les matériaux hybrides. De nombreux supports solide et solvants physiques sont testés. Les adsorbants hybrides synthétisés sont par la suite évalués en mesurant les isothermes d’adsorption du CO2. Généralement, tous les adsorbants hybrides montrent une augmentation de la solubilité du CO2 en comparaison avec le solvant physique. Les résultats obtenus mettent en évidence, certaines conditions à remplir pour l'obtention d'un adsorbant hybride efficace. On montre notamment que le support solide doit posséder une structure mésoporeuse avec une forte surface spécifique. De plus, on identifie une taille optimale du solvant permettant d'obtenir une solubilité améliorée. Parmi tous les candidats testés, le N-méthyl-2-pyrrolidone confiné dans un support mésoporeux de MCM-41 s’est avéré être l’adsorbant hybride dont les performances d'adsorption sont les plus importantes. Des simulations de Monte Carlo dans l'ensemble grand canonique sont ensuite effectuées, afin d'interpréter le comportement de la solubilité du CO2 dans un système modèle d’adsorbant hybride à base de MCM-41. Les mécanismes microscopiques sous-jacents à l’augmentation de la solubilité sont notamment clairement identifiés. La présence des molécules de solvant favorise l'adsorption des molécules de CO2 dans le pore, engendrant une augmentation de la solubilité dans l’adsorbant hybride par rapport à celle de l’adsorbant natif ainsi qu’à celle du solvant macroscopique. De plus, pour évaluer l’efficacité de captage du CO2 de ces adsorbants hybrides, l'effet des interactions entre les adsorbats et le solide ainsi que l’impact de la taille de la molécule du solvant sur la solubilité du CO2 sont étudiés. Nous avons constaté qu’un système hybride idéal doit présenter une faible interaction entre le solvant et le solide et une forte affinité entre le solvant et le CO2. De plus, on identifie l'existence d'une taille optimale de solvant permettant de maximiser la solubilité du CO2 dans le système hybride. D’après les résultats de la simulation, la couche de solvant crée des pseudo-micropores dans le solide mésoporeux MCM-41, et permet à plus de molécules de CO2 d’être absorbés sous l'influence d'un confinement et d'une interaction surfacique plus importants
In this work, we investigate the existence and the fundamentals mechanisms underlying the apparition of enhanced CO2 solubility in hybrid materials. A number of prospective solid supports and physical solvents are chosen and the synthesized hybrid adsorbents are subsequently evaluated by measuring CO2 adsorption isotherms. Generally, all the hybrid adsorbents show an enhancement of CO2 solubility compared with the bulk physical solvent. According to further investigation, we have obtained certain requisites for a good solid support, of which structure should be mesoporous with large surface area. In addition, there is an optimized solvent's size to achieve an enhanced solubility. As a result, among the candidates, the N-methyl-2-pyrrolidone confined in MCM-41 adsorbent is proven to be the most suitable hybrid adsorbent for an effective CO2-removal application. In order to gain a deeper insight, Grand Canonical Monte Carlo simulations are then performed to interpret the CO2 solubility behavior in a modeled system of hybrid MCM-41 adsorbent. As a result, the microscopic mechanisms underlying the apparition of enhanced solubility are then clearly identified. In fact, the presence of solvent molecules favors the layering of CO2 molecule within the pores thereby the CO2 solubility in hybrid adsorbent markedly increases in comparison with the one found in the raw adsorbent as well as in the bulk solvent. In addition, to fully evaluate the efficiency of hybrid adsorbents in capturing CO2, the sorbent-solid interactions along with the solvent molecular size impact on CO2 solubility are further investigated in this study. We found that an ideal hybrid system should possess a weak solvent-solid interaction but a strong solvent-CO2 affinity. Furthermore, an optimal solvent size is obtained for the enhanced CO2 solubility in the hybrid system. According to the simulation results, the solvent layer builds pseudo-micropores inside the mesoporous MCM-41, enabling more CO2 molecules to be absorbed under greater influence of spatial confinement and surface interaction
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Charousset, Katharina. "Procédé de traitement d'un adsorbant usé chargé en mercure." Pau, 1998. http://www.theses.fr/1998PAUU3029.

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Le CMG 273 usé est un adsorbant spécifique du mercure. Une méthode de régénération de ce déchet industriel spécial est proposée. Il s'agit d'un procédé physico-chimique d'extraction sélective par complexation du sulfure de mercure avec une solution basique de sulfure de sodium. La faisabilité technique est étudiée en faisant varier plusieurs paramètres. Les résultats obtenus montrent un rendement d'extraction du mercure de 95 %. Une unité pilote est conçue. Elle comporte un module d'extraction-rinçage et un module de traitement des solutions. L'étape d'extraction est optimisée. L'étude cinétique permet de déterminer les ordres partiels de la réaction par rapport aux réactifs. Plusieurs solutions de rinçage sont utilisées. Une solution d'acide sulfurique à 0,05 mol/L est choisie. Le procédé développé comporte trois extractions successives avec 2,5 L/kg de solution extractive et deux rinçages avec de l'acide sulfurique. L'étude pilote permet d'améliorer de 3 % le rendement d'extraction par rapport à l'étude de faisabilité. Le traitement des solutions extractives chargées en mercure est effectué par acidification. Le sulfure de mercure précipite et du sulfure d'hydrogène se dégage. Le solide filtré contient 50 % de mercure qui peut être valorisé dans l'industrie du mercure comme minerai. Le filtrat contient 0,035 mg/L de mercure, 3 mg/L en aluminium, 130 g/L en sulfates et une DCO importante. Le sulfure d'hydrogène émis est récyclé par piègeage dans une solution basique d'une part en raison de sa toxicité, mais surtout pour former de nouvelles solutions extractives. Un bilan matière du procédé est donné. L'intégralité du cuivre, phase active de l'adsorbant, est conservée sur le support. La réactivation de l'adsorbant est possible et laisse envisager sa régénération. Un prédimensionnement industriel, permettant de traiter 2 tonnes d'adsorbant par jour, est donné. Une application industrielle de ce procédé est envisagée et un brevet a été déposé.
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Sacerdote-Peronnet, Myriam. "Etude cristallochimique d'interactions adsorbant-adsorbat dans des zéolithes présentant la topologie MFI : applications aux systèmes MFI-P-xylène et MFI-benzène." Lyon 1, 1992. http://www.theses.fr/1992LYO10028.

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Ce travail porte sur la mise en evidence d'interactions adsorbant/adsorbat (adsorbat=p-xylene, benzene) dans des materiaux microporeux zeolithiques polycristallins presentant la topologie mfi (silicalite, zsm-5). Des etudes par diffraction x et neutronique sur poudres et par modelisation theorique (minimisation d'energie basee sur les modeles de buckingham et de lennard-jones) ont abouti aux resultats suivants: dans le cas du systeme mfi/n p-xylene, il existe trois composes definis pour n=2, 4 et 8 molecules/maille, deux domaines diphases (0 n 2 et 4 n 8) et une solution solide (2 n 4). Entre 0 et 4 molecules/maille, les especes adsorbees occupent les intersections des canaux droits et en zig-zag. Dans la phase saturee (n=8), les molecules remplissent l'ensemble des canaux. Dans le cas du systeme mfi/n benzene, il se forme au moins cinq composes definis pour n=4, 6, 7, 7. 2 et 8 molecules/maille, trois domaines diphases (4 n 6, 6 n 7 et 7 n 7. 2) et une solution solide (7. 2 n 8). Jusqu'a n=4, le benzene est situe aux intersections. Dans le complexe mfi/6 benzene, 4 molecules occupent les intersections et 2 les canaux en zig-zag. Dans la phase saturee (n=8), le benzene ne remplit que les intersections et les canaux droits
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Oulanti, Lamiae. "Synthèse d'un support solide adsorbant les contaminants de l'eau blanche." Thèse, Université du Québec à Trois-Rivières, 2012. http://depot-e.uqtr.ca/6184/1/030405485.pdf.

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Mercy, Michel. "Contribution à l'étude des relations entre coefficients d'accommodation et physisorption." Nancy 1, 1989. http://www.theses.fr/1989NAN10221.

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Le présent travail vise à déterminer dans quelle mesure la physisorption d'un gaz A sur une surface peut modifier le coefficient d'accomodation thermique d'un gaz B sur cette même surface. Le système considéré est celui de l'hélium s'accomodant sur une surface de tungstène nue ou recouverte de xénon ou de krypton physisorbé
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Mo, Yayuan. "Elaboration et mise en oeuvre de membranes alginate, polyethylenimine à haut pouvoir de percolation : application en tant que matériaux adsorbants ou catalyseurs supportés." Thesis, Montpellier, 2020. http://www.theses.fr/2020MONTG014.

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L'alginate est un polymère hydrophile et biocompatible portant de nombreuses fonctions carboxyliques et de nombreux groupes hydroxyles. Ce travail a développé et optimisé le procédé de fabrication de membranes à haute pouvoir de percolation à base d'alginate. Ce procédé simple permet, par mélange de deux solutions d’alginate et de polyethyleneimine (PEI), d’obtenir un hydrogel structuré dont la stabilité est améliorée par réticulation (des fonctions aminées de la PEI par le glutaraldéhyde (GA)). Cette double interaction (PEI/alginate, PEI/GA) permet d’obtenir après séchage à l’air libre (donc peu énergivore et sans moyen sophistiqué contrairement aux procédés conventionnels) de produire des membranes macroporeuses autorisant la percolation par drainage simple de solutions. Ce matériau a été développé et utilisé pour deux types d’applications : (a) l’adsorption d’ions métalliques (cationiques et anioniques), et (b) l’hydrogénation de composés nitrophénoliques par catalyse hétérogène. Les membranes et leur interaction avec les ions métalliques ont été analysées par spectroscopie infrarouge et par FTIR, MEB, et XPS. L'adsorbant est caractérisé par la présence de groupements carboxyliques et de fonctions aminées qui offre de nombreuses possibilités d’interaction avec les ions métalliques en jouant tant sur des propriétés de chélation (carboxylates, amines libres) que sur des propriétés d’échange ionique/attraction électrostatique (amines protonés) en fonction de la typologie du métal, de sa spéciation et du pH de la solution. Ces différentes possibilités ont été illustrées par une série d’expérimentations portant sur des ions métalliques tels que : Hg(II), Cu(II), Se(VI), Cr(VI), As(V). Ces différentes études ont permis d’illustrer : l’affinité particulière des membranes pour les anions métalliques (préférentiellement aux cations) en raison notamment de la plus grande disponibilité des fonctions aminées protonées. Par ailleurs, une étude complémentaire a été menée sur de la PEI réticulée par le GA (conditionnée sous forme de poudre) pour explorer l’effet de réticulation de la PEI sur la fixation des ions métalliques. L’étude a permis de démontrer que le taux de réticulation a un effet modéré sur l’adsorption des ions Se(VI). Enfin, après avoir brièvement étudié l’adsorption du Pd(II) sur les membranes, il a été procédé à une réduction du Pd(II) fixé sur le support (partiellement converti en Pd(0)) afin de synthétiser des membranes Pd/PEI/Alginate pour étudier une réaction simple d’hydrogénation du 3-NP en 3-AP. Ceci démontre la faisabilité d’application de ces supports pour une application en catalyse hétérogène
Alginate is a hydrophilic and biocompatible polymer with abundant free carboxyl and hydroxyl groups. This work developed and optimized the process for the fabrication of highly-percolating membranes based on alginate. The simple process has been designed by mixing alginate and polyethyleneimine (PEI) to obtain a structured hydrogel and subsequently improved stability by crosslinking between glutaraldehyde (GA) and amine groups of PEI. This double interaction (PEI/alginate, PEI/GA) makes it possible to produce macroporous membranes, after air-drying (without energy-consuming and sophisticated drying procedure), allowing natural drainage. The prepared membranes have been used for two applications: (a) sorption of metal ions (cationic and anionic), and (b) hydrogenation of nitrophenolic compounds by heterogeneous catalysis. The membranes and their interactions with metal ions were analyzed by FTIR, SEM, and XPS. The adsorbent was characterized by the presence of carboxylic groups and amino functions, which offers numerous possibilities for interacting with metal ions by complexation (i.e., carboxylates, free amines) and ion exchange/electrostatic attraction (i.e., protonated amine groups) depending on the pH of solution and metal speciation. These different possibilities have been illustrated by a series of experiments on metal ions such as Hg(II), Cu(II), Se(VI), Cr(VI), As(V). These various studies illustrate the particular affinity of membranes for metal anions (preferentially to cations) due in particular to the greater availability of protonated amino functions. Furthermore, an additional study was conducted on PEI crosslinked with GA (as a powder) for exploring the effect of the crosslinking of PEI on the binding of metal ions. The study demonstrated that the crosslinking rate has a moderate effect on the sorption of Se(VI) ions. At last, after briefly studying the sorption of Pd(II) on the membranes, a reduction was made of Pd(II) loaded on the support (partially converted to Pd(0)) in order to synthesize catalysis for the hydrogenation of 3-NP to 3-AP. This demonstrates the feasibility of applying these supports for heterogeneous catalysis
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8

Chkir, Mouna. "Synthèse de gels phosphocalciques issus de déchets industriels carbonatés : caractérisation physico-chimique, thermique et rhéologique." Electronic Thesis or Diss., Toulouse, INPT, 2011. http://www.theses.fr/2011INPT0039.

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Les travaux présentés ont pour objectif la valorisation de déchets industriels riches en carbonates pour la préparation de gels phosphocalciques. Ces gels sont destinés à des applications environnementales. Leur synthèse est basée sur la réaction des carbonates de calcium avec une solution de phosphates solubles à température ambiante et à pression atmosphérique. Le procédé élaboré à l’échelle laboratoire consiste à additionner les réactifs en variant les paramètres expérimentaux tels que le Ca/P, la température et la dilution. Cette méthode a été utilisée pour la synthèse de gels à partir de deux types de déchets industriels. Une synthèse de référence a été définie à base de carbonates de calcium purs. Dans la première partie de ce travail, une caractérisation physico-chimique et thermique des poudres synthétisées a été réalisée par différentes techniques telles que le Microscopie Electronique à Balayage (MEB), la diffraction des rayons X (XRD), la spectroscopie infrarouge à transformée de Fourier (FTIR) et la thermogravimétrie. Les résultats obtenus ont montré la formation de précurseurs de Ca-HAp qui évoluent de phosphates de calcium monocalciques à des particules de Ca-HAp amorphe. Une chronologie de cette évolution a été mise en évidence pour les carbonates de calcium purs et confirmée pour les carbonates de calcium issus des déchets industriels. La transformation des carbonates de calcium a été étudiée en réalisant un bilan massique basé sur la consommation des carbonates de calcium. Ce bilan, réalisé à température ambiante, a confirmé un taux de conversion à plus de 90% pour les carbonates de calcium purs, jusqu’à 70% des carbonates issus du premier type de déchet et 50% des carbonates correspondant au deuxième type de déchet. L’influence de certains paramètres expérimentaux s’est avérée primordiale pour l’amélioration de ce taux de conversion et particulièrement l’augmentation de la température. Dans la deuxième partie de ce travail, les propriétés rhéologiques des gels phosphocalciques ont été étudiées. Le suivi de la viscosité et des caractéristiques élastiques a permis de mettre en évidence la formation d’un gel viscoélastique qui pourrait présenter de nombreux avantages dans des applications environnementales
The aim of this research was the valorization of industrial wastes rich in carbonates to prepare calcium phosphate gels for environmental applications. The phosphocalcic gel was prepared by precipitation from calcium carbonate industrial waste and a phosphate solution. The process consisted in mixing the reagents under a set of variable parameters (pH, Ca / P, temperature, dilution) to study the influence of each parameter on the conversion rate and the adsorption properties of the synthetized material. A reference hydroxyapatite was prepared following the same procedure with a commercial carbonate grade (98% wt), in order to compare with the waste-made hydroxyapatite. The characterization and chemical analysis of synthetized hydroxyapatites were carried out by means of rheology, particle size, Scanning Electron Microscopy, BET, ThermoGravimetric Analysis – Differential Scanning Calorimetry, X Ray Diffraction and Infrared spectroscopy (Fourrier Transformation Infra Red) analysis. The results obtained led to find out the chronology of the carbonates conversion into Ca-Hap precursors and particles of amorphous Ca-HAp. The kinetics show that the conversion rate is about 90% (wt) for pure CaCO3, 70% for the first waste and 50% for the second waste. Monitoring the viscosity and elastic properties has allowed us to demonstrate the formation of a viscoelastic gel. The synthesis of an elastic gel of calcium phosphate using CaCO3 waste seems to be a promising way to transform calcium residues into a valuable sorbent. Valorization of this gel in environmental applications for pollution remediation seems to be an advantageous perspective
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9

Mouche, Emmanuel. "Contribution à l'étude du comportement dynamique d'une molécule de méthane adsorbée dans une cavité de la zéolite naA par calcul de potentiel et diffusion de neutrons." Paris 11, 1985. http://www.theses.fr/1985PA112159.

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Nous présentons une étude théorique et expérimentale de l'orientation et des vibrations externes d'une molécule de CH4 piégée par un cation Na+ de la zéolite NaA. Un calcul semi-empirique de l'énergie d'interaction de CH avec Na + montre qu'il existe une orientation privilégiée de la molécule piégée. Nous avons établi l'expression de la section efficace incohérente de diffusion neutronique du système. Cette expression nous indique comment mettre en évidence expérimentalement l'orientation et la dynamique de la molécule. Une expérience de spectroscopie neutronique nous a permis de mesurer les fréquences externes de la molécule et de les comparer à celles données par le calcul
We present a theoretical and experimental study of the orientation and the external frequencies of a CH 4 molecule trapped by a Na+ cation of the NaA zeolite. A semi empirical calculation of CH 4 with Na shows that there is a favourable molecular orientation. We obtain the expression for the incoherent neutron scattering cross section. This expression gives the experimental conditions for obtaining the molecular orientation and dynamics. A neutron scattering experiment enabled a measurement of the external frequencies for comparison with those given by the calculation
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Ragon, Alain. "Etude d'une technique de traitement permanent de l'insuffisance renale chronique terminale : la regeneration d'un hemofiltrat par des adsorbants." Aix-Marseille 2, 1996. http://www.theses.fr/1996AIX22951.

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Books on the topic "Adsorbant"

1

Scott, Thomas M. Effect of silica-based adsorbant on oil absorption/retention and durability of Abernathy dry salmon diet. Seattle, Wash: National Oceanic and Atmospheric Administration, National Marine Fisheries Service, Northwest and Alaska Fisheries Center, Utilization Research Division, 1987.

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Scott, Thomas M. Effect of silica-based adsorbant on oil absorption/retention and durability of Abernathy dry salmon diet. Seattle, Wash: National Oceanic and Atmospheric Administration, National Marine Fisheries Service, Northwest and Alaska Fisheries Center, Utilization Research Division, 1987.

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Smith, Erika. Inorganic microporous adsorbent materials. Norwalk, CT: Business Communications Co., 1997.

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Saito, Kyoichi, Kunio Fujiwara, and Takanobu Sugo. Innovative Polymeric Adsorbents. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-8563-5.

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Deshpande, Ravindra. Inorganic microporous adsorbents. Norwalk, CT: Business Communications Co., 2001.

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Yoram, Cohen, Peters Robert William 1952-, Athota Kiran V, and American Institute of Chemical Engineers., eds. Novel adsorbents and their environmental applications. New York: American Institute of Chemical Engineers, 1995.

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L, Amy Gary, ed. Adsorbent treatment technologies for arsenic removal. Denver, CO: AWWA Research Foundation [and] American Water Works Association, 2005.

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Loureiro, José Miguel, and Mykola T. Kartel, eds. Combined and Hybrid Adsorbents. Dordrecht: Springer Netherlands, 2006. http://dx.doi.org/10.1007/1-4020-5172-7.

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United States. Environmental Protection Agency, ed. Demonstration of Ambersorb® 563 adsorbent technology. Cincinnati, OH: U.S. Environmental Protection Agency, 1995.

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McLean, Stuart. The density of adsorbing materials. [Toronto]: University Library, pub. by the Librarian, 1996.

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Book chapters on the topic "Adsorbant"

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King, Jerry W., Robert L. Eissler, and John P. Friedrich. "Supercritical Fluid—Adsorbate—Adsorbent Systems." In ACS Symposium Series, 63–88. Washington, DC: American Chemical Society, 1988. http://dx.doi.org/10.1021/bk-1988-0366.ch004.

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Gooch, Jan W. "Adsorbent." In Encyclopedic Dictionary of Polymers, 21. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_292.

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Evans, E., and D. Needham. "Long Range Interactions Between Lipid Bilayers in Salt Solutions and Solutions of Non-Adsorbant Polymers: Comparison of Mean-Field Theory with Direct Measurements." In Springer Proceedings in Physics, 178–98. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-83202-4_25.

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Jeevanandam, Pethaiyan, and Kenneth J. Klabunde. "Adsorbents." In Synthesis, Properties, and Applications of Oxide Nanomaterials, 381–410. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2006. http://dx.doi.org/10.1002/9780470108970.ch14.

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Dubey, Shikha, Deepak Gusain, Yogesh Chandra Sharma, and Faizal Bux. "Adsorbents." In Batch Adsorption Process of Metals and Anions for Remediation of Contaminated Water, 9–39. First edition. | Boca Raton : CRC Press, 2021.: CRC Press, 2021. http://dx.doi.org/10.1201/9781003006367-2.

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Aliano, Antonio, Giancarlo Cicero, Hossein Nili, Nicolas G. Green, Pablo García-Sánchez, Antonio Ramos, Andreas Lenshof, et al. "Adsorbate Adhesion." In Encyclopedia of Nanotechnology, 83. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-90-481-9751-4_100015.

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Bharat, Girija K., M. K. N. Yenkie, and G. S. Natarajan. "Influence of Physico-Chemical Characteristics of Adsorbent and Adsorbate on Competitive Adsorption Equilibrium and Kinetics." In The Kluwer International Series in Engineering and Computer Science, 91–99. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4613-1375-5_10.

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Machado, Fernando Machado, and Carlos Pérez Bergmann. "Materials for Adsorbent Applications." In Nanostructured Materials for Engineering Applications, 141–55. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-19131-2_10.

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Yefremova, S., A. Kablanbekov, K. Anarbekov, L. Bunchuk, A. Terlikbayeva, and A. Zharmenov. "Coke-Based Carbon Adsorbent." In Proceedings of the 18th Symposium on Environmental Issues and Waste Management in Energy and Mineral Production, 217–24. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-99903-6_19.

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Zoroufchi Benis, Khaled, Jafar Soltan, and Kerry N. McPhedran. "Biochar: A Potent Adsorbent." In Biochar and its Composites, 49–72. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-5239-7_3.

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Conference papers on the topic "Adsorbant"

1

Chakraborty, Anutosh, Kyaw Thu, and Kim Choon Ng. "Advanced Adsorption Cooling cum Desalination Cycle: A Thermodynamic Framework." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-63372.

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We have developed a thermodynamic framework to calculate adsorption cooling cum desalination cycle performances as a function of pore widths and pore volumes of highly porous adsorbents, which are formulated from the rigor of thermodynamic property surfaces of adsorbent-adsorbate system and the adsorption interaction potential between them. Employing the proposed formulations, the coefficient of performance (COP) and overall performance ratio (OPR) of adsorption cycle are computed for various pore widths of solid adsorbents. These results are compared with experimental data for verifying the proposed thermodynamic formulations. It is found from the present analysis that the COP and OPR of adsorption cooling cum desalination cycle is influenced by (i) the physical characteristics of adsorbents, (ii) characteristics energy and (iii) the surface-structural heterogeneity factor of adsorbent-water system. The present study confirms that there exists a special type of adsorbents having optimal physical characteristics that allows us to obtain the best performance.
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Chan, K. C., and Christopher Y. H. Chao. "Improved Thermal Conductivity of 13X/CaCl2 Composite Adsorbent by CNT Embedment." In ASME 2013 Heat Transfer Summer Conference collocated with the ASME 2013 7th International Conference on Energy Sustainability and the ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/ht2013-17168.

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Adsorption cooling systems utilize the principle of adsorption to generate cooling effect. Composite adsorbents synthesized from zeolite 13X and CaCl2 have previously been shown to have a high adsorption capacity and high adsorption rate with lower desorption temperature where the adsorption capacity and adsorption rate are 420% and 122% of zeolite 13X under the same condition respectively. This results in more compact design and a lower temperature waste-heat source can be used. The system performance is, however, limited by the low thermal conductivity of the 13X/CaCl2 composite adsorbent which is common for many adsorbents. Due to the low thermal conductivity of the adsorbent, poor heat transfer and slow temperature change in the adsorbent bed lead to longer time for the adsorbent to achieve the adsorption/desorption temperature. This directly reduces the adsorption/desorption rate of the adsorbate on the adsorbent, such as water on zeolite, and results in lower system coefficient of performance (COP) and specific cooling power (SCP). It was proposed that embedding carbon nanotube (CNT) into the 13X/CaCl2 composite absorbents can increase the thermal conductivity of the adsorbent bed to improve the system performance. Thus, the properties of the multi-wall CNT (MWCNT) embedded zeolite 13X/CaCl2 composite adsorbents were investigated to find out the optimized composition for the cooling system. The material properties of the MWCNT embedded zeolite 13X/CaCl2 composite adsorbent were measured. The thermal conductivities of the MWCNT embedded 13X/CaCl2 composite adsorbents were predicted by developing a new theoretical model modified based on area contact model. The performance of the adsorption cooling system using zeolite 13X and MWCNT embedded composite adsorbent were studied numerically. It is found that the COP and SCP are improved by 3.6 and 26 times respectively. This results in a much more compact and energy efficient cooling system.
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Xu, Xinhai, Shuyang Zhang, and Peiwen Li. "Desulfurization of Liquid Phase Jet-A Fuel by Selective Adsorption at Room Temperature." In ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology collocated with the ASME 2013 Heat Transfer Summer Conference and the ASME 2013 7th International Conference on Energy Sustainability. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/fuelcell2013-18100.

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To produce syngas from reforming of jet fuels for fuel-cell-based auxiliary power units, it is necessary to keep the fuel ultra-clean of sulfur. Several Ni-Ce based adsorbents for sulfur cleaning from jet-A fuel under room temperature were developed and tested in fixed bed reactors in this work. The adsorbent preparation procedure and calcination atmosphere were optimized for the highest adsorbent desulfurization capacity. Desulfurization performance due to the ratio of fixed bed column diameter (Dc) and adsorbent particle size (Dp) and liquid hourly space velocity (LHSV) were also investigated in a factorial experiment. The adsorbents can effectively remove sulfur in Jet-A fuel from over 1000 ppmw level to below 30 ppmw. The highest sulfur adsorption capacity achieved is 2.44 mg S/g adsorbent at the breakthrough point of 30 ppmw. To effectively scale up the fixed bed reactor, the LHSV should be kept lower than 0.65 and the Dc/Dp needs to be larger than 124.
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Chakraborty, Anutosh, Bidyut Baran Saha, Shigeru Koyama, Ibrahim Ibrahim El-Sharkawy, and Kim Choon Ng. "Theoretical Insight of Physical Adsorption for a Single Component Adsorbent+Adsorbate System." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-42943.

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The thermodynamic property surfaces for a single-component adsorbent + adsorbate system have been derived and developed from the view point of classical thermodynamics. These thermodynamic frameworks enable us to compute the specific heat capacity, partial enthalpy and entropy for the analyses of adsorption processes thoroughly. A theoretical framework for the estimation of the isosteric heat of adsorption between an adsorbate (vapor) and an adsorbent (solid) is also derived for the thermodynamic requirements of chemical equilibrium, Maxwell relations and the entropy of the adsorbed phase. Conventionally, the specific heat capacity of the adsorbate is assumed to correspond to its liquid phase specific heat capacity and more recently to that of its gas phase. We have shown here that the derived specific heat capacity fills up the information gap with respect to the state of adsorbed phase to dispel the confusion as to what is the actual state of the adsorbed phase.
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Anyanwu, Emmanuel E., and Nnamdi V. Ogueke. "Transient Analysis and Performance Prediction of a Solid Adsorption Solar Refrigerator." In ASME 2005 International Solar Energy Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/isec2005-76211.

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The transient analysis and performance prediction of a solid adsorption solar refrigerator, using activated carbon/methanol adsorbent/adsorbate pair are presented. The mathematical model is based on the thermodynamics of the adsorption process, heat transfer in the collector plate/tube arrangement, and heat and mass transfers within the adsorbent/adsorbate pair. Its numerical model developed from finite element transformation of the resulting equations computes the collector plate and tube temperatures to within 5°C. The condensate yield and coefficient of performance, COP were predicted to within 5% and 9%, respectively. The resulting evaporator water temperature was also predicted to within 4%. Thus the model is considered a useful design tool for the refrigerator to avoid costly experimentation.
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6

Kannan, Pravin, Pal Priyabrata, Fawzi Banat, Satyadileep Dara, Ibrahim Khan, Eisa AlJenaibi, and Marwan AlAwlqi. "Calcium Alginate-Based Carbon Composite Adsorbents for Lean Methyldiethanolamine Reclamation: Laboratory to Pilot Scale Testing and Validation." In Abu Dhabi International Petroleum Exhibition & Conference. SPE, 2021. http://dx.doi.org/10.2118/207754-ms.

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Abstract Calcium alginate-based carbon composite (CAC) adsorbents have been proved to effectively remove total organic acid anions as HSS anions, metal ions, and organic degraded products from lean methyldiethanolamine (MDEA solvents) used as solvent in natural gas sweetening unit. During the material developmental phase, the CAC adsorbent was synthesized and utilized to remove various contaminants, including heat stable salts (HSS), organic degraded products, and heavy metal ions from lean MDEA using a lab-scale adsorption setup. Based on the results, a "demo-scale" fixed bed adsorption unit was designed and simulated using adsorption model to predict breakthrough behavior. In the current work, the efficiency of the CAC adsorbent in removing HSS and total organic acid anions were investigated. Analysis of treated samples demonstrated the removal efficiency of the adsorbent under plant scale conditions. Further experiments performed at lab scale indicated the effectiveness of the adsorbent in the removal of bicine from lean MDEA samples. This work provides a framework for future testing and comprehensive process performance evaluation of adsorbents for lean MDEA reclamation in actual plant conditions. A fast, simple, and reliable scale up procedure for fixed bed adsorber developed earlier was validated through this work.
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Rubanov, Yury, Yury Rubanov, Yulia Tokach, Yulia Tokach, Marina Vasilenko, Marina Vasilenko, Elena Goncharova, and Elena Goncharova. "CLEANING UP EMERGENCY OIL SPILLS FROM THE WATER SURFACE WITH MAGNETIC ADSORBENTS." In Managing risks to coastal regions and communities in a changing world. Academus Publishing, 2017. http://dx.doi.org/10.31519/conferencearticle_5b1b93c71c15e4.50364588.

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There was suggested a method of obtaining a complex adsorbent with magnetic properties for the oil spill clean-up from the water surface by means of controlled magnetic field. As magnetic filler a finely-dispersed iron-ore concentrate in the form of magnetite, obtained by wet magnetic separation of crushed iron ore, was suggested. As an adsorbing component the disintegrating electric-furnace steelmaking slag, obtained by dry air-cooling method, was selected. The mass ratio of components slag:magnetite is 1(1,5÷2,0). For cleaning up emergency oil spills with the suggested magnetic adsorbent a facility, which is installed on a twin-hulled oil recovery vessel, was designed. The vessel contains a rectangular case between the vessel hulls with inlet and outlet for the treated water, the bottom of which is a permanently moving belt. Above the belt, at the end point of it there is an oil-gathering drum with magnetic system. The adsorbent is poured to oil-products layer from a hopper, provided with drum feeder. Due to the increased bulk weight the adsorbent sinks rapidly into the oil layer on the water surface. If the large non-floating flocculi are formed, they sink and sedimentate on the moving belt and are moved to the oil-gathering drum. The saturated adsorbent is removed from the drum surface with a scraper, connected with a gutter, with contains a rotating auger.
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Rubanov, Yury, Yury Rubanov, Yulia Tokach, Yulia Tokach, Marina Vasilenko, Marina Vasilenko, Elena Goncharova, and Elena Goncharova. "CLEANING UP EMERGENCY OIL SPILLS FROM THE WATER SURFACE WITH MAGNETIC ADSORBENTS." In Managing risks to coastal regions and communities in a changing world. Academus Publishing, 2017. http://dx.doi.org/10.21610/conferencearticle_58b4315da403d.

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There was suggested a method of obtaining a complex adsorbent with magnetic properties for the oil spill clean-up from the water surface by means of controlled magnetic field. As magnetic filler a finely-dispersed iron-ore concentrate in the form of magnetite, obtained by wet magnetic separation of crushed iron ore, was suggested. As an adsorbing component the disintegrating electric-furnace steelmaking slag, obtained by dry air-cooling method, was selected. The mass ratio of components slag:magnetite is 1(1,5÷2,0). For cleaning up emergency oil spills with the suggested magnetic adsorbent a facility, which is installed on a twin-hulled oil recovery vessel, was designed. The vessel contains a rectangular case between the vessel hulls with inlet and outlet for the treated water, the bottom of which is a permanently moving belt. Above the belt, at the end point of it there is an oil-gathering drum with magnetic system. The adsorbent is poured to oil-products layer from a hopper, provided with drum feeder. Due to the increased bulk weight the adsorbent sinks rapidly into the oil layer on the water surface. If the large non-floating flocculi are formed, they sink and sedimentate on the moving belt and are moved to the oil-gathering drum. The saturated adsorbent is removed from the drum surface with a scraper, connected with a gutter, with contains a rotating auger.
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9

Queiroz, Ana, Vinicius A. Reis, Jose L. Diaz de Tuesta, Paulo Brito, and Antonio E. Ribeiro. "VALORIZATION OF OLIVICULTURE RESIDUES TO PRODUCE BIOCHARS FOR THE REMOVAL OF NAPROXEN FROM WATER." In 22nd International Multidisciplinary Scientific GeoConference 2022. STEF92 Technology, 2022. http://dx.doi.org/10.5593/sgem2022v/3.2/s12.28.

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Adsorption is a treatment process based on accumulation of the adsorbate (pollutant) on the adsorbent surface that has been successful used for the optimization of wastewater treatment plant effluents cleaning. This work will present the main experimental results for the removal of naproxen from water by adsorption using activated carbon obtained from olive stones. Four types of activated carbon material were prepared from olive stones. The batch method was applied to experimentally measure the equilibrium adsorption isotherms. The most significant adsorption parameters were optimized, such as the solution pH, mass of the adsorbent, contact time and temperature. The physicochemical characterization of the pyrolyzed material shows a considerable superficial area of 608 m2/g when compared with other natural biomass-based materials. A removal efficiency of 100% was obtained for 24 h and a pH=4.5. The Langmuir model was used to better describe the adsorption behavior for adsorbent with better removal performance with the highest maximum adsorption capacity value of 35.2 mg naproxen/g adsorbent. The kinetics of the adsorption is well described by a pseudo-second order model. Obtained results in this work clearly show that olive stones, usually a residue from the Portuguese and Mediterranean oliviculture, can be exploited as a promising and lowcost biomass source on the production of adsorbent materials with considerable potential to remove micropollutants, such as the naproxen, from water.
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Cao, Z. Jay, Aaron J. Knobloch, Wei-Cheng Tian, Stacey J. Kennerly, Nannan Chen, Mark A. Shannan, and Rich Masel. "Thermal Analysis of a Microfluidic Preconcentrator for Portable Micro Gas Analysis Systems." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-10342.

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Two key challenges to portable gas chromatography are reducing preconcentrator power consumption and accurate temperature control of adsorbent. This paper presents the results of thermal modeling performed to optimize a microfabricated preconcentrator based on a silicon microhotplate and utilizing Metal Organic Framework (MOF) adsorbents. From this modeling, two design changes are presented that reduce the power consumption by 1.5 W and reduce temperature variation across the microhotplate by 50%.
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Reports on the topic "Adsorbant"

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Janke, Chris, Oyola Yatsandra, Richard Mayes, none,, Gary Gill, Kuo Li-Jung, Jordana Wood, and Das Sadananda. Complete braided adsorbent for marine testing to demonstrate 3g-U/kg-adsorbent. Office of Scientific and Technical Information (OSTI), April 2014. http://dx.doi.org/10.2172/1148692.

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Tsouris, Costas, Richard T. Mayes, Christopher James Janke, Sheng Dai, S. Das, W. P. Liao, Li-Jung Kuo, et al. Adsorbent Alkali Conditioning for Uranium Adsorption from Seawater. Adsorbent Performance and Technology Cost Evaluation. Office of Scientific and Technical Information (OSTI), September 2015. http://dx.doi.org/10.2172/1253238.

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Scott, C. (Adsorbents in bioseparations). Office of Scientific and Technical Information (OSTI), May 1987. http://dx.doi.org/10.2172/6816556.

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Janke, Christopher, Sadananda Das, Yatsandra Oyola, Richard Mayes, Tomonori Saito, Suree Brown, Gary Gill, Li-Jung Kuo, and Jordana Wood. Milestone Report - Complete New Adsorbent Materials for Marine Testing to Demonstrate 4.5 g-U/kg Adsorbent. Office of Scientific and Technical Information (OSTI), August 2014. http://dx.doi.org/10.2172/1162052.

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Mayes, Richard T., and Sheng Dai. M4FT-15OR03100415 - Update on COF-based Adsorbent Survey. Office of Scientific and Technical Information (OSTI), February 2015. http://dx.doi.org/10.2172/1253234.

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Otermat, J. E., W. O. Wikoff, and J. L. Kovach. Residence time determination for adsorbent beds of different configurations. Office of Scientific and Technical Information (OSTI), February 1995. http://dx.doi.org/10.2172/95661.

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Lee, S. H. D., K. Natesan, and W. M. Swift. Selection of non-adsorbing alkali components. Office of Scientific and Technical Information (OSTI), November 1992. http://dx.doi.org/10.2172/10109622.

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Croft, David T., David K. Friday, and Jeffrey M. Campbell. Adsorbents for Pressure Swing Adsorption Regeneration. Fort Belvoir, VA: Defense Technical Information Center, June 1999. http://dx.doi.org/10.21236/ada368016.

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Park, Jiyeon, Robert T. Jeters, Gary A. Gill, Li-Jung Kuo, and George T. Bonheyo. Toxicity of Uranium Adsorbent Materials using the Microtox Toxicity Test. Office of Scientific and Technical Information (OSTI), October 2015. http://dx.doi.org/10.2172/1179520.

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Bill Batchelor, Dong Suk Han, and Eun Jung Kim. Novel Adsorbent-Reactants for Treatment of Ash and Scrubber Pond Effluents. Office of Scientific and Technical Information (OSTI), January 2010. http://dx.doi.org/10.2172/979448.

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