Relevant bibliographies by topics / Adsorbents

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Academic literature on the topic 'Adsorbents'

Author: Grafiati
Published: 4 June 2021
Last updated: 12 June 2025

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Journal articles on the topic "Adsorbents"

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Zahro, Septi Fatimatus, and Sandyanto Adityosulindro. "Literature Review: Penggunaan Bahan Berbasis Limbah Sebagai Adsorben untuk Degradasi Zat Warna pada Air Limbah." Jurnal Kesehatan Lingkungan Indonesia 22, no. 3 (2023): 359–68. http://dx.doi.org/10.14710/jkli.22.3.359-368.

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Latar belakang: Penggunaan adsorben bahan limbah dari limbah pertanian, industri maupun bahan alam menjadi alternatif baru dalam pengolahan air limbah yang mengandung zat warna. Limbah ini dapat menyebabkan berbagai masalah kesehatan bagi makhluk hidup mulai dari alergi, cidera permanen, asma, bahkan kanker. Tujuan review artikel ini adalah untuk memberikan informasi tren penelitian penggunaan adsorben dari bahan limbah dalam penyisihan zat warna serta informasi mengenai komposisi bahan, dan pengaplikasiannya sebagai potensi alternatif baru bahan adsorben dalam pengolahan limbah.Metode: Metode dalam penulisan review artikel ini dengan metode PRISMA 2020 menggunakan PRISMA checklist melalui 27 identifikator yang telah disediakan. Seleksi artikel dilakukan dengan beberapa kriteria dari tahun publikasi, kata kunci, klasifikasi bahan adsorben, serta artikel tentang adsorpsi secara umum sebagai pendukung. Artikel jurnal terpilih dan sesuai dengan kebutuhan sebanyak 28 artikel kemudian dilakukan pengkajian serta pembahasan lebih lanjut.Hasil: Hasil review artikel yang dikaji sebanyak 50% artikel yang memanfaatkan limbah pertanian sebagai adsorben, 18% artikel memanfaatkan limbah industri, dan 32% artikel memanfaatkan bahan alam. Pengkajian dilakukan menyeluruh mengenai metode pembuatan adsorben, komposisi bahan adsorben, kemampuan adsorpsi, studi kinetika dan studi isotherm adsorpsi. Hasil kajian menunjukkan kemampuan adsorben bahan limbah sangat baik dengan efisiensi tertinggi hingga 99,95%. Metode pembuatan adsorben yang paling umum digunakan dengan aktivasi fisika. Model isotherm yang digunakan sebagian besar adalah Langmuir dengan kinetika adsorpsi pseudo orde kedua.Simpulan: Potensi pemanfaatan adsorben dari bahan limbah sangat besar, ditinjau dari persentase efisiensinya dan kelimpahan bahan baku. Dalam proses adsorpsinya dipengaruhi oleh kandungan bahan, luas permukaan, dan metode pembuatan adsorben. ABSTRACT Title: Literature Review: The Use of Waste Materials as Adsorbent for Degradation Dyes in WastewaterBackground: Industrial, agricultural, and natural dyes can now be treated with adsorbents. This wastewater can cause allergies, serious wounds, asthma, and cancer. This article review discusses current research trends in using waste materials as dye removal adsorbents and their composition and possible usage as new, alternative adsorbents in the waste treatment sector.Method: This article review used PRISMA 2020 with 27 identifiers and the checklist. Articles were selected by year, keywords, adsorbent material categorization, and adsorption in general. Following 28 article requirements, selected journal articles were researched and discussed.Result: The analysis of the articles found that 32% of the articles used natural materials, 18% of the articles used industrial waste, and 50% of the articles used agricultural waste as an adsorbent. The process for creating adsorbents, the make-up of adsorbent materials, adsorption capacity, kinetic studies, and adsorption isotherm studies were all thoroughly evaluated. The study's findings demonstrate that waste materials have excellent adsorbent properties, with the highest efficiency reaching up to 99.95%. Physical activation is the most widely used adsorbent preparation technique. Most of the isotherm models in use have pseudo-second order adsorption kinetics and are Langmuir.Conclusion: Given the percentage of efficiency and the abundance of raw materials, there is a very large potential for using adsorbents made from waste materials. The adsorbent's surface area, material composition, and manufacturing process all have an impact on the adsorption process.
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Putri, Silvia Devi Eka, Sri Mulijani, and Komar Sutriah. "Facile Synthesis of Composite Chitosan and Durio zibethinus Seed and Its Applications as Adsorbent of Metal Ion Ni(II)." ALCHEMY Jurnal Penelitian Kimia 19, no. 2 (2023): 197. http://dx.doi.org/10.20961/alchemy.19.2.65948.197-209.

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Nickel is one of the most dangerous heavy metals that impact water ecosystems and human health. In the study, natural and harmless composite materials such as biochar and chitosan were modified to build adsorbent composites and form optimal conditions for the adsorption of nickel heavy metal ions from contaminated wastewater. Biochar was prepared from <em>Durio zibethinus</em> seeds by hydrothermal method to form nanopowder. It was treated with acid, while chitosan was designed as nanopowder by hydrothermal method, also without acid treatment. Composite adsorbents were prepared by mixing biochar and chitosan with a ratio of 4:3 (w/w). Fourier Transform Infrared characterizes composite materials as adsorbents, biochar, and chitosan. The surface morphology of the adsorbent was evaluated by scanning electron microscopy. Furthermore, Langmuir, Freundlich, and Temkin isotherms determine the adsorbent's performance. In addition, batch adsorption experiments were carried out to measure the effect of solution pH, adsorbent dosage, and initial concentration of metal ions. Nickel ion adsorption by the composite adsorbent showed an adsorption capacity of 26.69 mg/g, a maximum removal efficiency of 89.39% at optimum conditions of pH 6, an adsorbent dose of 0.5 g, and a contact time of 200 minutes. This adsorption capacity was better than chitosan and durian seed adsorbents. The nickel ion adsorption process by composite adsorbent shows a pattern in the Temkin isotherm model. In contrast, the chitosan and <em>Durio zibethinus </em>seed adsorbents tended to follow the Langmuir and Freundlich isotherm models. In addition, the adsorption kinetics of the composite material showed pseudo-second-order kinetics, and the reaction was exothermic.
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Yuliana, Y., Veronica J. S, and Bambang Gunantara. "Penggunaan adsorben untuk mengurangi kadar free fatty acid, peroxide value dan warna minyak goreng bekas." Jurnal Teknik Kimia Indonesia 4, no. 2 (2018): 212. http://dx.doi.org/10.5614/jtki.2005.4.2.4.

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This research was carried out to examine the ability of calcium silicate, magnesium silicate, activated carbon and bentonite as adsorbent to decrease the FFA content, PV and dark color intensitv of used frying oil. Adsorbent treatment may improve the quality and extend the frying life of used frying oil. A mixture of used frying oil and certain adsorbent were agitated at constant temperature 150oC for 1 hour Four adsorbents were used at various concentrations. Subsequently, the oil was filtered by vacuum filtration, The changes in FFA content, PV and color intensity were observed. Calcium silicate, magnesium silicate, activated carbon and bentonite could be used as a good adsorbent to reduce the FFA content, PV and dark color intensity of the usedfryng oil. Calcium silicate was more effective than the other adsorbents in reducing the FFA content and PV of the oil. Activated carbon and magnesium silicate showed about the same ability in removing dark color components, and its ability is better than calcium silicate and bentonite. Keywords: Vegetable Oil,Adsorbents, FFA, PV, Color AbstrakPada penelitian ini dipelajari kemampuan kalsium silikat, magnesium silikat, karbon aktif dan bentonit sebagai adsorben untuk menurunkan kadar asam lemak bebas (FFA), bilangan peroksida (PV), dan warna gelap minyak goreng bekas. Pengolahan dengan adsorben ini diharapkan dapat meningkatkan kualitas minyak goreng bekas sehingga umur pemakaian minyak goreng dapat diperpanjang. Minyak goreng bekas dan adsorben diaduk pada suhu konstan I50oC selama 1 jam dengan variasi konsentrasi dan jenis adsorben. Setelah itu minyak goreng disaring dengan vakum dan diamati perubahan kadar FFA, P, V, dan warna yang terjadi. Kalsium silikat, magnesium silikat, karbon aktif dan bentonit dapat berfingsi sebagai adsorben yang baik untuk mengurangi kadar FFA, PV dan warna minyak goreng bekas. Kalsium silikat lebih efektifuntuk penurunan kadar FFA dan PV dari pada ketiga adsorben yang lain. Karbon aktif dan magnesium silikat menunjukkan kemampuan mereduksi warna gelap minyak yang relatif hampir sama, tetapi lebih baik daripada kalsium silikat dan bentonit. Kata Kunci: Minyak Goreng, Adsorben, FFA, PV, Warna
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Ruhaimi, A. H., C. C. Teh, and Muhammad Arif Ab Aziz. "Mesoporous Magnesium Oxide Adsorbent Prepared via Lime (Citrus aurantifolia) Peel Bio-templating for CO2 Capture." Bulletin of Chemical Reaction Engineering & Catalysis 16, no. 2 (2021): 366–73. http://dx.doi.org/10.9767/bcrec.16.2.10505.366-373.

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The utilization of the lime (Citrus aurantifolia) peel as a template can improve the adsorbent’s structural properties, which consequently affect its CO2 uptake capacity. Herein, a mesoporous magnesium oxide (MgO-lime (Citrus aurantifolia) peel template (LPT)) adsorbent was synthesized using an LPT. MgO-LPT demonstrated improved structural properties and excellent CO2 uptake capacity. Moreover, another MgO adsorbent was prepared via thermal decomposition (MgO-TD) for comparison. The prepared adsorbents were characterized by N2 physisorption, Fourier transform infrared spectroscopy and thermogravimetric analysis. The CO2 uptake of these adsorbents was under 100% CO2 gas and ambient temperature and pressure conditions. MgO-LPT exhibited a higher Brunauer–Emmett–Teller surface area, Barrett–Joyner–Halenda pore volume, and pore diameter of 23 m2.g−1, 0.142 cm3.g−1, and 24.6 nm, respectively, than those of MgO-TD, which indicated the mesoporous structure of MgO-LPT. The CO2 uptake capacity of MgO-LPT is 3.79 mmol CO2.g−1, which is 15 times that of MgO-TD. This study shows that the application of lime peel as a template for the synthesis of MgO adsorbents is a promising approach to achieve MgO adsorbents with enhanced surface area and thus increased CO2 capture performance. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
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Handayani, Lia, Azwar Thaib, Nurhayati Nurhayati, Yayuk Astuti, and Adi Darmawan. "Production and Characterization of Adsorbent from Oyster Shell (Crassostrea gigas) Using Physics and Chemical Activation with ZnCl2 and Its Application for Removal of Hexavalent Chromium." Elkawnie 6, no. 2 (2020): 329. http://dx.doi.org/10.22373/ekw.v6i2.7333.

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Abstract: Oyster shell waste has been investigated as a raw material for making adsorbents that will be activated. Physical activation uses temperatures of 500 ºC, 600 ºC, 700 ºC, 800 ºC, 900 ºC and chemical activation uses ZnCl2 with a concentration of 1 %, 5 %, 10 % and 15 %. Based on the analysis of the characteristics that have been carried out for physically activated adsorbents, the oyster shell calcined at 800 ºC produces the best characteristics, it is a radius of 35.11 Å with a percentage of removal of 38.04 %, as well as the results of the FTIR, XRF and SEM analysis gives the best results among others. Whereas for chemically activated adsorbents, the use of activator ZnCl2 10% produces adsorbents with the best characteristics among others with a radius of 84.14 Å and removal percentage of 65.68 %, the best results for adsorbents activated using 10% ZnCl2 are also supported by analysis results given by FTIR, XRF, and SEM.Keywords: Adsorbent; BET; Cr6+; Oyster Shell Waste; XRF Abstrak: Cangkang tiram (Crassostrea gigas) telah diteliti sebagai bahan baku pembuatan adsorben yang akan diaktivasi secara fisika dan kimia. Pembuatan adsorben dengan aktivasi secara fisika menggunakan variasi suhu 500 ºC, 600 ºC, 700 ºC, 800 ºC dan 900 ºC. sedangkan aktivasi kimia yaitu menggunakan aktivator ZnCl2 menggunakan variasi konsentrasi 1 %, 5 %, 10% dan 15 %. Berdasarkan analisa karakteristik yang telah dilakukan untuk adsorben-adsorben yang telah diaktivasi secara fisika, cangkang tiram yang di kalsinasi pada suhu 800ºC menghasilkan karakteristik yang paling baik, yaitu radius pori-pori 35,11 Å dengan persentase penyisihan sebesar 38,04 %, begitu pula dengan hasil analisa FTIR, XRF dan SEM memberikan hasil terbaik diantara yang lain. sedangkan untuk adsorben-adsorben yang diaktivasi secara kimia, penggunaan aktivator ZnCl2 10% menghasilkan adsorben dengan karakteristik yang paling baik diantara lainnya dengan radius pori-pori 84,14 Å dan persentase penyisihan sebesar 65,68%, hasil terbaik untuk adsorben yang diaktivasi menggunakan ZnCl2 10 % juga didukung oleh hasil analisa dari FTIR, XRF dan SEM.
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Zulkefli, Nurul Noramelya, Rajeevelosana Seladorai, Mohd Shahbudin Masdar, Nabilah Mohd Sofian, and Wan Nor Roslam Wan Isahak. "Core Shell Nanostructure: Impregnated Activated Carbon as Adsorbent for Hydrogen Sulfide Adsorption." Molecules 27, no. 3 (2022): 1145. http://dx.doi.org/10.3390/molecules27031145.

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This study focuses on the synthesis, characterization, and evaluation of the performance of core shell nanostructure adsorbent for hydrogen sulfide (H2S) capture. Commercial coconut shell activated carbon (CAC) and commercial mixed gas of 5000 ppm H2S balanced N2 were used. With different preparation techniques, the CAC was modified by core shell impregnation with zinc oxide (ZnO), titanium oxide (TiO2), potassium hydroxide (KOH), and zinc acetate (ZnAC2). The core structure was prepared with CAC impregnated by single chemical and double chemical labelled with ZnAC2-CAC (single chemical), ZnAC2/KOH-CAC, ZnAC2/ZnO-CAC, and ZnAC2/TiO2-CAC. Then, the prepared core was layered either with KOH, TiO2, NH3, or TEOS for the shell. The synthesized adsorbents were characterized in physical and chemical characterization through scanning electron microscopy (SEM), thermal gravimetric analysis (TGA), and Brunauer-Emmett-Teller (BET) analyzers. Operation of the adsorber column takes place at ambient temperature, with absolute pressure at 1.5 bar. The H2S gas was fed into the column at 5.5 L/min and the loaded adsorbents were 150 g. The performance of synthesized adsorbent was analyzed through the adsorbent’s capability in capturing H2S gas. Based on the results, ZnAc2/ZnO/CAC_WOS shows a better adsorption capacity with 1.17 mg H2S/g and a 53% increment compared to raw CAC. However, the degradation of the adsorbents was higher compared to ZnAc2/ZnO/CAC_OS and to ZnAc2/ZnO/CAC_WS ZnAc2/ZnO/CAC_OS. The presence of silica as a shell has potentially increased the adsorbent’s stability in several cycles of adsorption-desorption.
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Al-Wasidi, Asma S., Mohamed Khairy, Babiker Y. Abdulkhair, and Ehab A. Abdelrahman. "Efficient Disposal of Basic Fuchsin Dye from Aqueous Media Using ZrO2/MgMn2O4/Mg(Mg0.333Mn1.333)O4 as a Novel and Facilely Synthesized Nanocomposite." Inorganics 11, no. 9 (2023): 363. http://dx.doi.org/10.3390/inorganics11090363.

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In this work, amorphous and crystalline novel products based on Zr, Mg, and Mn were facilely fabricated through the Pechini sol–gel procedure using inexpensive chemicals and an uncomplicated apparatus. Also, these products showed high efficiency as novel adsorbents in getting rid of basic fuchsin dye from aqueous solutions. The adsorbent, which was fabricated before calcination, was abbreviated as KE. In addition, the adsorbents, which were created at 500 and 700 °C, were designated as KE500 and KE700, respectively. The created adsorbents were characterized using high-level transmission electron microscopy (HR-TEM), X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDS), N2 adsorption/desorption analyzer, and field emission scanning electron microscope (FE-SEM). The XRD showed that the KE adsorbent is amorphous, whereas the KE500 and KE700 adsorbents are mixtures of ZrO2, MgMn2O4, and Mg(Mg0.333Mn1.333)O4 nanostructures. The HR-TEM exhibited that the KE adsorbent consists of very fine irregular shapes, whereas the KE500 adsorbent contains quasi-spherical particles with a mean diameter of 45.16 nm. Furthermore, the HR-TEM exhibited that the KE700 adsorbent consists of polyhedral shapes with a mean diameter of 76.28 nm. Furthermore, the BET surface area of the KE, KE500, and KE700 adsorbents is 67.85, 20.15, and 13.60 m2/g, respectively. Additionally, the elimination of basic fuchsin dye by the KE, KE500, and KE700 adsorbents is exothermic, physical in nature, and follows the pseudo-first-order as well as Langmuir equations. Further, the maximum uptake capabilities of the KE, KE500, and KE700 adsorbents toward basic fuchsin dye are 239.81, 174.83, and 93.19 mg/g, respectively.
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Nazem, Mahitab, Ali Gad, and Mohamed Soliman. "Testing and Evaluation Performance of Borosilicate Glasses for Ammonia, Nitrate, and Total Nitrogen Removal from Industrial Wastewater." International Journal of Membrane Science and Technology 10, no. 4 (2023): 1695–709. http://dx.doi.org/10.15379/ijmst.v10i4.2306.

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Several studies were conducted utilizing various adsorbents in an effort to remove NH3+, NO3, and total nitrogen (TN) by adsorption process. In this study, Borosilicate glass is used as an adsorbent material. The effectiveness of the adsorbent in removing NH3+, NO3, and TN was examined, that in relation to the effect of solution characteristics. Three different types of glass intermediate oxides (Al2O3, SnO, and Bi2O3) were used to synthesize three different samples of borosilicate glass (adsorbents), that to study their effect on the adsorption efficiency of borosilicate glass. Aluminum oxide Al2O3 was used to synthesize adsorbent (I), tin oxide SnO was used to synthesize adsorbent (J), and bismuth oxide Bi2O3 was used to synthesize adsorbent (K). Adsorbents (I, J, and K) achieved a clear improvement in the performance of the adsorption process. Despite the convergence of competencies, adsorbents J and K were superior to adsorbent I. With adsorbent K and an initial concentration of contaminants 28 mg NH3+/ L, 28 mg NO3/ L, and 60 mg TN / L, the removal efficiency of NH3+, NO3, and TN was 49.5%, 55%, and 40%, respectively. The removal efficiency increased with initial concentration of contaminants increasing, which became around 79% NH3+, 93% NO3, and 88% TN for adsorbent K. The best efficiency of ammonia removal achieved with pH value 8.9, it was 64.1%, 75.3%, and 77.1% for adsorbents I, J, and K, respectively. The highest efficiency of nitrate removal was in acidic case, reaching 90.1%, 95.2%, and 93.8% for adsorbents I, J, and K, respectively, at pH value 4.1. Adsorption data were fitted with Langmuir and Freundlich isotherm models to demonstrate the adsorption behavior of NH3+, NO3, and TN onto adsorbents (I, J, and K). It was found that the data were well fitted to both models. Overall, the findings demonstrated that borosilicate glass has the potential to be an effective adsorbent for the removal of ammonia, nitrate, and total nitrogen from industrial effluent.
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Solih, Fathimath Afrah, Abdul Aziz Abdul Raman, and Archina Buthiyappan. "Prospects of green adsorbent produced from avocado seed via hydrothermal carbonization for treatment of dye wastewater." IOP Conference Series: Earth and Environmental Science 1281, no. 1 (2023): 012019. http://dx.doi.org/10.1088/1755-1315/1281/1/012019.

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Abstract The adsorption process is a highly effective operational technique for dye removal from industrial wastewater. At present, the commercial adsorbents employed for removing dyes are manufactured via a slow pyrolysis process, which is time-consuming and requires more energy. Hydrothermal carbonization, on the other hand, is a highly efficient alternative method of synthesizing adsorbents that consumes less time and energy while producing effective adsorbents. This study synthesized adsorbents from avocado seeds via hydrothermal carbonization, followed by chemical activation. The adsorption study revealed that the avocado seed adsorbent has the highest color removal of 80 % using 3.5 g/L of adsorbent at acidic pH under optimized conditions. In conclusion, hydrochar from the avocado seed is a potential green adsorbent for the treatment of dye wastewater.
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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 (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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Dissertations / Theses on the topic "Adsorbents"

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Purvis, Duncan Ross. "Perfluoropolymer adsorbents." Thesis, University of Cambridge, 1995. https://www.repository.cam.ac.uk/handle/1810/273023.

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Mosca, Alessandra. "Structured zeolite adsorbents /." Luleå : Luleå University of Technology, 2007. http://epubl.ltu.se/1402-1757/2007/47/LTU-LIC-0747-SE.pdf.

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Bahamón, García Daniel. "New generation adsorbents for gas separation: from modeling to industrial application." Doctoral thesis, Universitat Autònoma de Barcelona, 2015. http://hdl.handle.net/10803/325690.

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Teniendo en cuenta el rápido aumento de la población y el crecimiento en el consumo de energía como consecuencia de grandes progresos en transporte y tecnología, el desarrollo sostenible es de especial relevancia pues sugiere la búsqueda de formas de mitigar las emisiones de gases de efecto invernadero, incluyendo la captura y almacenamiento de carbono (o utilización), la eficiencia energética, fuentes alternativas de energía y ahorro de energía, como ya se ha sugerido por el protocolo de Kioto y los informes del IPCC. De ahí que en los últimos años se haya dedicado un esfuerzo considerable a desarrollar tecnologías para la captura y almacenamiento de CO2 a partir de fuentes concentradas de emisión. Además de establecer nuevas tecnologías, durante las últimas décadas la ciencia de materiales sólidos porosos se ha convertido en una de las áreas más intensas de investigación y desarrollo para químicos, físicos y científicos de materiales. De hecho, se ha avanzado considerablemente en el desarrollo de nuevos adsorbentes para diversos procesos de separación. Por ejemplo, las estructuras órgano-metálicas (MOFs) han ido ganando considerable atención como materiales prometedores para aplicaciones de almacenamiento y separación de gases, debido a sus propiedades excepcionales. Sin embargo, es necesaria una comprensión a nivel molecular de la adsorción de gases para acelerar el diseño y desarrollo de aplicaciones a la carta. También es fundamental conocer el comportamiento bajo condiciones de humedad e impurezas, como se tiene normalmente en aplicaciones industriales específicas. El trabajo desarrollado en esta Tesis Doctoral destaca el uso de técnicas de simulación molecular para la optimización de procesos relacionados con el medio ambiente. El objetivo general se centra en avanzar en el campo de materiales para la captura y separación de dióxido de carbono a condiciones de proceso. Se considera de manera explícita la influencia del vapor de agua e impurezas, tanto a la luz de los fundamentos de la adsorción como en la aplicación para la captura de CO2 por post-combustión mediante ciclos de adsorción por oscilación. Partiendo de una breve descripción de los fundamentos de la adsorción y de las simulaciones moleculares, se presenta una revisión exhaustiva de estudios recientes de materiales para captura y separación de CO2, proporcionando así información valiosa para su aplicación industrial. Basados en esta revisión, se han estudiado en detalle algunos de los materiales más prometedores para un proceso de adsorción por cambio de temperatura (TSA) basado en simulaciones moleculares, proponiéndose un nuevo procedimiento para la evaluación y optimización de los sistemas de captura en condiciones reales. Dada la gran influencia de trazas de agua en la separación, se investiga también el CuBTC (uno de los MOF más estudiados y estables en agua) en comparación con la zeolita de referencia 13X. Se examina en detalle el efecto de las especies coexistentes, así como la influencia del agua y SO2 en los gases de combustión, con el fin de llegar a una mejor comprensión de la capacidad de adsorción, la selectividad, la localización de las moléculas en el material, las distribuciones de calor isostérico y su relación con el proceso. Asimismo, se han llevado a cabo estudios paramétricos detallados para una investigación comparativa de la separación de mezclas multi-componentes de gases de combustión mediante el uso de otras zeolitas como caolinita y chabacita. Y finalmente, se presenta un trabajo adicional relacionado con otro problema medioambiental: la separación de un contaminante (ibuprofeno) en agua, mediante el uso de carbones activados, usando las mismas técnicas computacionales, demostrando así la versatilidad de las herramientas empleadas para este tipo de sistemas.<br>Given the rapid increase in population and the growth in energy consumption as a consequence of major developments in transportation and technology, sustainable development is of special relevance, suggesting ways to mitigate greenhouse gases emissions, including carbon capture and storage (or utilization, CCSU), energy efficiency, alternative energy sources and energy savings, as already suggested by the Kyoto’s Protocol and the IPCC reports. Hence, much effort has been devoted in recent years to develop technologies for capture and storage of CO2 from concentrated sources of emission. Apart from establishing new technologies, over the last decades the science of porous solid materials has become one of the most intense areas of research and development for chemists, physicists, and materials scientists. In fact, considerable progress has been made in recent years on the development of novel adsorbents. For instance, Metal Organic Frameworks (MOFs) have been gaining considerable attention as promising nanoporous materials for gas storage and gas separation applications due to their exceptional physical and chemical properties, and have already been demonstrated to be promising materials in the separation of different gases, however, a molecular level understanding of gas adsorption in the pores is crucial to accelerate the design and development of these and other applications. It is also fundamental to know their behavior under moisture conditions and impurities content, as normally found at specific industrial applications. The work developed in this Thesis highlights the use of molecular simulation techniques for optimizing environmental related processes, providing new procedures to assess the use of these materials from their fundamental knowledge until their applications at industrial conditions. The overall objective is to advance in the field of materials for CO2 capture and separation at process conditions. The influence of water vapor and impurities is explicitly considered, both, in the light of the fundamentals of adsorption and in the application for post-combustion carbon dioxide capture by swing adsorption cycles. Starting from a brief description of the fundamentals of adsorption and molecular simulations, a novel throughout review on recent studies of materials for CO2 capture and separation is presented, thus providing valuable information to assess their industrial application. Based on this review, some of the most promising materials for CO2 separation in a Temperature Swing Adsorption (TSA) process have been studied in detail by using molecular simulations (compared to experimental data when available), proposing a new process for the evaluation and optimization capture systems under real conditions. In addition, given the great influence of water as a trace compound on the separation, CuBTC (one of the most studied MOFs, stable in water and with potential for industrial application) has been investigated in comparison to the benchmark zeolite 13X. The effect of the coexisting species as well as the influence of water and SO2 in flue gas is examined in detail in order to reach a better understanding of the adsorption capacity, selectivity, adsorption density location and isosteric heat distributions. And finally, detailed parametric studies have been carried out for a comparative computational investigation for separating of multi-component mixtures of flue gas by using other representative zeolites such as kaolinite and chabazite. Additional work, related to another environmental problem: the separation of a pollutant (ibuprofen) in water, by using activated carbons, is also presented here, demonstrating the versatility of the tools used for these types of systems.
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Zourna, Kalliopi. "Smart magnetic affinity adsorbents." Thesis, University of Birmingham, 2009. http://etheses.bham.ac.uk//id/eprint/511/.

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As the focus of research on ‘adaptive/responsive’ surfaces has in recent years contributed strongly towards the design of surface materials with ‘intelligent’ or ‘smart’ behaviour, current superparamagnetic adsorbents being employed both in small and large scale operations can be surface modified and improved by gaining dual functionalities. In this work, modification of M-PVA supports with polymer brushes of dual properties has been explored for their intended use in bioseparation technology, i.e. for both selectively protein binding and enhanced temperature elution of especially difficult to elute species such as haemoglobin. Tethering of polymer brushes was achieved by employing two different ‘grafting from’ routes, i.e. cerium (IV) initiated polymerisation and Atom Transfer Polymerisation Reaction (ATRP). By identifying the optimum cerium (IV) reaction conditions, the said chemistry was further utilised to attach different polymers (thermoresponsive and affinity ligands) and their combination (thermo-affinity) at fixed positions onto M-PVA supports, either as di-block or mixed functionality polymer brushes. The configuration of introduced polymer chains as well as the haemoglobin binding characteristics of the above materials was evaluated, and their efficiency for haemoglobin and GFP desorption via sequential temperature transitions was demonstrated. Mixed polymer brushes manufactured using sequential ATRP after partial bromination of AGE activated magnetic supports were characterised and tested likewise. Protein binding and release efficiency was dependent on brush configuration (length and spacing between the graft sites of polymers), pNIPAAm content, type of affinity ligand and type of protein employed. From the above materials those with polymer chains of sufficient pNIPAAm length and at such spacing allowing their ‘free’ expansion/collapse upon temperature change (especially those grafted via cerium (IV) route) were found efficient, as brush behaviour favour enhanced desorption of difficult to elute species.
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Mabovu, Bonelwa. "Brine treatment using natural adsorbents." Thesis, University of the Western Cape, 2011. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_3665_1319180742.

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The current study investigated application of natural adsorbents in brine treatment. Brines are hypersaline waters generated in power stations and mining industries rich in Mg2+, K+, Ca2+, Na+, SO4 2- , Cl- and traces of heavy metals, thus there is a need for these brines to be treated to recover potable water and remove problematic elements. Natural adsorbents have been successfully used in waste water treatment because of their high surface area and high adsorptive properties when they are conditioned with acid or base. The investigation of pH showed that natural adsorbents did not perform well at low pH of 4 and 6. The adsorbents were able to work efficiently at the natural pH of 8.52 of the brine solution. These results show that natural adsorbents hold great potential to remove cationic major components and selected heavy metal species from industrial brine wastewater. Heterogeneity of natural adsorbents samples, even when they have the same origin, could be a problem when wastewater treatment systems utilizing natural clinoptilolite and bentonite are planned to be developed. Therefore, it is very important to characterize the reserves fully in order to make them attractive in developing treatment technologies.
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Rao, Sumitrananda N. R. "Novel adsorbents using metal complexes." Thesis, Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/10200.

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Li, Yuan-Yao. "Air separation with monolithic adsorbents." Thesis, University of Bath, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242787.

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Wardlow, Peter William. "Interactions involving antacids and adsorbents." Thesis, Queen's University Belfast, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.356902.

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Mokaya, Robert. "Layered materials as selective adsorbents." Thesis, University of Cambridge, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.260454.

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Lotsi, Bertha. "Mesoporous Adsorbents for Perfluorinated Compounds." Digital Commons @ East Tennessee State University, 2020. https://dc.etsu.edu/etd/3729.

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Effective adsorbents for polyfluorinated compounds (PFCs) were successfully prepared. And they were tested in the adsorption of perfluorooctanoic and perfluorooctanesulfonic acids. Bridged silsesquioxanes containing secondary and tertiary amino groups were synthesized by sol-gel condensation of bis[3-(trimethoxysilyl)propyl]amine and bis[3-(methylamino)propyl]-trimethoxysilane in acidic media with surfactants. Obtained materials are mesoporous with a high BET surface area. They combine high structural stability with a high concentration of surface amino groups serving as adsorption sites. Batch adsorption tests demonstrated their extremely high adsorption capacity on PFCs: in some experiments, it reached up to 88% of the adsorbent weight. Adsorption of PFCs changed the surfaces of the adsorbent nanoparticles from hydrophilic to hydrophobic thus providing their agglomeration and floatability. Column tests showed fast adsorption of PFCs even at high concentrations and high flow rates. Obtained results can be used in the development of an effective filtration device for clean-up of water contaminated by PFCs.
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Books on the topic "Adsorbents"

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

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Deshpande, Ravindra. Inorganic microporous adsorbents. Business Communications Co., 2001.

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

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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. American Institute of Chemical Engineers, 1995.

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Crini, Grégorio, and Eric Lichtfouse, eds. Green Adsorbents for Pollutant Removal. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-92111-2.

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Crini, Grégorio, and Eric Lichtfouse, eds. Green Adsorbents for Pollutant Removal. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-92162-4.

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Meili, Lucas, and Guilherme Luiz Dotto, eds. Advanced Magnetic Adsorbents for Water Treatment. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-64092-7.

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Holmes, Richard James. Chemical modification of activated carbon adsorbents. Brunel University, 1986.

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Tharini, J., and Sabu Thomas, eds. Carbon Nanomaterials and their Composites as Adsorbents. Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-48719-4.

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Melenios, P. Treatment of textile effluents with ozone and adsorbents. UMIST, 1996.

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Book chapters on the topic "Adsorbents"

1

Jeevanandam, Pethaiyan, and Kenneth J. Klabunde. "Adsorbents." In Synthesis, Properties, and Applications of Oxide Nanomaterials. 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. CRC Press, 2021. http://dx.doi.org/10.1201/9781003006367-2.

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Saito, Kyoichi, Kunio Fujiwara, and Takanobu Sugo. "Fundamentals of Radiation-Induced Graft Polymerization." In Innovative Polymeric Adsorbents. Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-8563-5_1.

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Saito, Kyoichi, Kunio Fujiwara, and Takanobu Sugo. "Scientific Findings on Graft Chains." In Innovative Polymeric Adsorbents. Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-8563-5_2.

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Saito, Kyoichi, Kunio Fujiwara, and Takanobu Sugo. "Revolution in the Form of Polymeric Adsorbents 1: Porous Hollow-Fiber Membranes and Porous Sheets." In Innovative Polymeric Adsorbents. Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-8563-5_3.

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Saito, Kyoichi, Kunio Fujiwara, and Takanobu Sugo. "Revolution in the Form of Polymeric Adsorbents 2: Fibers, Films, and Particles." In Innovative Polymeric Adsorbents. Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-8563-5_4.

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Saito, Kyoichi, Kunio Fujiwara, and Takanobu Sugo. "Competition Between Graft Chains and Rivals." In Innovative Polymeric Adsorbents. Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-8563-5_5.

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Saito, Kyoichi, Kunio Fujiwara, and Takanobu Sugo. "Commercial Products by Radiation-Induced Graft Polymerization." In Innovative Polymeric Adsorbents. Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-8563-5_6.

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Llewellyn, P., F. Rouquerol, and J. Rouquerol. "SCTA and Adsorbents." In Hot Topics in Thermal Analysis and Calorimetry. Springer US, 2003. http://dx.doi.org/10.1007/978-1-4757-3735-6_6.

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Sing, K. S. W. "Characterization of Adsorbents." In Adsorption: Science and Technology. Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-2263-1_1.

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Conference papers on the topic "Adsorbents"

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SAMAN, Norasikin, Kavij Kumar SUBRAMANIAN, Khairiraihanna JOHARI, Shazwin MAT TAIB, and Eglė MARČIULAITIENĖ. "Physicochemistry properties of water treatment sludge (WTS) as adsorbents for dyes and antibiotics removal." In 12th International Conference “Environmental Engineering”. VILNIUS TECH, 2023. http://dx.doi.org/10.3846/enviro.2023.951.

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Application of waste materials as adsorbent for water treatment has obtained special attention owning to their low cost and surface functionality. In this study the waste-treatment sludge (WTS) sludge was selected as based materials and used as adsorbents for dyes and antibiotic adsorption. The adsorbent was prepared by calcination of the washed and dried WTS adsorbent (S105) at 300 °C (S300) and 700 °C (S700). The morphology, elemental composition, functional groups, pH at point zero charged, and cationic exchange capacity were observed and evaluated to understand the adsorption performance capability of the adsorbents. Then, the adsorbents were test for dyes and antibiotic adsorption in aqueous solution. Adsorbent prepared at higher temperature have darker color. The FTIR peaks related to functional groups of organic compounds such as OH and CO were diminished when the WTS was calcined at 700 °C. Value of pHpzc of of S105, S300 and S700 were 5.43, 5.81 and 5.89, respectively. The value of CEC for S700 and S105 however lower than S300. Adsorption performance of WTS adsorbents towards cationic methylene blue (MB), anionic methyl orange (MO) and reactive red-120 was evaluated in aqueous solution. All adsorbents show high adsorption performance towards MO, but lower adsorption performance towards RR was observed. The calcination of WTS results the higher adsorption capacity observed for adsorption of anionic and cationic dyes. The S700 also show better adsorption performance towards OTC and TC. This study indicates that the WTS has a potential application as low-cost adsorbent to remove hazardous substances from aqueous solution.
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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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Cajucom, Ernesto Jr S., and Lolibeth V. Figueroa. "SURFACE MODIFICATION OF CANARIUM OVATUMENGL.(PILI) SHELL AS ADSORBENT OF LEAD(Pb2+) FROM AQUEOUS SOLUTION." In International Trends in Science and Technology. RS Global Sp. z O.O., 2021. http://dx.doi.org/10.31435/rsglobal_conf/30032021/7476.

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This study was carried out to investigate the efficiency of raw pili shell (RPS) and the surface modified pili shell using EDTA (EMPS) and oxalic acid (OMPS). A comparative study on the adsorption capacity of the adsorbents was performed against lead (Pb2+) from aqueous solution. The adsorbents were characterized by FTIR, which showed higher peak of adsorption bands of carboxylic groups on the acid modified pili shells. Scanning electron microscope orSEM was also used to describe the surface morphology of the adsorbents. The linear form of Langmuir and Freundlich models were applied to represent adsorption data. The calculated equilibrium data of Pb (II) best fitted to Langmuir compare to Freundlich isotherm model with maximum adsorption capacity (qmax) of 27.03 mg/g and 45.45 mg/g using EMPS and OMPS, respectively. Kinetic sorption models were used to determine the adsorption mechanism and the kinetic data of all the adsorbents correlated (R2=1) wellwith the pseudo second order kinetic model. Among the three adsorbents, OMPS shown higher percent removal of lead compared to RPS and EMPS. The large adsorption capacity rate indicated that chemically modified pili shell in present study has great potential to be used as a cost-effective adsorbent for the removal of lead ions from the water.
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Kannan, Pravin, Pal Priyabrata, Fawzi Banat, et al. "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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KONDO, A., Y. TAO, H. NOGUCHI, et al. "NEW NANOPOROUS ADSORBENTS." In Selected Reports at the 4th Pacific Basin Conference on Adsorption Science and Technology. WORLD SCIENTIFIC, 2007. http://dx.doi.org/10.1142/9789812770264_0003.

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KWAK, A. "Study of the Impact of –NH2 Modification on Adsorptive Properties of Graphene Oxide." In Terotechnology XII. Materials Research Forum LLC, 2022. http://dx.doi.org/10.21741/9781644902059-23.

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Abstract. Graphene oxide is a nanomaterial of very high adsorption capabilities due to its vast surface area. Moreover, numerous oxygen functional groups present on the surface of graphene oxide enable its modifications to be performed. The authors aimed to create adsorbents based on activated carbon impregnated with amine-modified graphene oxide. The study showed that the amino group functionalisation, both with the use of ethylenediamine (GO-EDA) and using polyaniline (GO-PANI), causes the adsorbent to remove lead, mercury, copper, and iron ions from aqueous solutions very efficiently. Both adsorbents also reduce the cadmium, nickel, zinc, and arsenic ion content, however to a lesser extent but nevertheless still significantly. The two sorbents can be applied in field water treatment to remove specific contaminants.
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Cao, Z. Jay, Aaron J. Knobloch, Wei-Cheng Tian, et al. "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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"Molecular screening of metal oxides for arsenic removal from water." In Sustainable Processes and Clean Energy Transition. Materials Research Forum LLC, 2023. http://dx.doi.org/10.21741/9781644902516-23.

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Abstract. Toxic metal arsenic in the ground water is poisonous and harmful that should be treated to ensure human health and safety. For many years, different technologies have been developed for the treatment of contaminated water and adsorption is an economical method in which a large number of adsorbents are being used including metal oxides. The selection of these metal oxides needs to be done systematically to choose the best metal oxide with good potential for arsenic removal from water. Previous work has been mostly focused on experimental study, which is time-consuming and expensive. Only a limited number of simulation study has been conducted, which is confined to only several specific adsorbents, such as oxides of iron. There is a need to do research for other metal oxides to evaluate which one is more capable of removing arsenic from water. In this research work, screening of metal oxides was done using Molecular Dynamics and Monte Carlo Simulation. The molecular structures were optimized and sorption calculations were performed at fixed pressure of 100kPa and temperature of 298K to observe the adsorption capability of metal oxides. Al2O3 and SnO2 were found to be good adsorbent for arsenic removal from water with adsorption capacity of 1681.80 g/g and 975.03 g/g respectively. Previously used Al2O3 was used as a benchmark for this research and adsorption capacity results also proved it. It was observed that SnO2 has potential to remove arsenic from water with adsorption capacity 975.03 g/g. The results displayed that SnO2 can be one of the best adsorbents for application of arsenic removal from water. It is concluded that apart from using conventional metal oxides for arsenic removal, other metal oxides should be studied and can also be used as an adsorbent as they can provide great adsorption capacity for arsenic removal from water.
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Reports on the topic "Adsorbents"

1

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

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

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McGarvey, David, John Mahle, and George Wagner. Chemical Agent Hydrolysis on dry and Humidified Adsorbents. Defense Technical Information Center, 2003. http://dx.doi.org/10.21236/ada417780.

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Yang, Ralph T. AIR SEPARATION BY PRESSURE SWING ADSORPTION USING SUPERIOR ADSORBENTS. Office of Scientific and Technical Information (OSTI), 2001. http://dx.doi.org/10.2172/789503.

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Rohatgi, Upendra, and Michael Furey. New Adsorbents for Vehicle Exhaust and Evaporative Emission Control. Office of Scientific and Technical Information (OSTI), 2013. http://dx.doi.org/10.2172/1083611.

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Kuo, Li-Jung, Gary A. Gill, Jonathan E. Strivens, et al. Investigations Into the Reusability of Amidoxime-Based Polymeric Uranium Adsorbents. Office of Scientific and Technical Information (OSTI), 2016. http://dx.doi.org/10.2172/1330925.

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Zhang, Zhicheng, Linfeng Rao, Carter W. Abney, Vyacheslav Bryantsev, and Aleksandr Ivanov. Determination of Vanadium Binding Mode on Seawater-Contacted Polyamidoxime Adsorbents. Office of Scientific and Technical Information (OSTI), 2017. http://dx.doi.org/10.2172/1410923.

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Furimsky, E., and M. Yumura. Solid adsorbents for removal of hydrogen sulphide from hot gas. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1985. http://dx.doi.org/10.4095/302594.

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Yiacoumi, Sotira, and Costas Tsouris. Optimizing Polymer-Grafted Amidoxime-based Adsorbents for Uranium Uptake from Seawater. Office of Scientific and Technical Information (OSTI), 2019. http://dx.doi.org/10.2172/1491738.

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Gill, Gary A., Li-Jung Kuo, Jonathan E. Strivens, Jordana R. Wood, Chien Wai, and Horng-Bin Pan. Investigations into Alternative Desorption Agents for Amidoxime-Based Polymeric Uranium Adsorbents. Office of Scientific and Technical Information (OSTI), 2015. http://dx.doi.org/10.2172/1322540.

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