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Littérature scientifique sur le sujet « Gas-solid adsorption »

Auteur : Grafiati

Publié le 4 juin 2021

Mis à jour le 6 février 2022

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Articles de revues sur le sujet "Gas-solid adsorption"

Cortés, Joaquín. "Gas-solid adsorption isotherms." Advances in Colloid and Interface Science 22, no. 2-4 (1985): 151–76. http://dx.doi.org/10.1016/0001-8686(85)80004-x.

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Tóth, József. "Uniform interpretation of gas/solid adsorption." Advances in Colloid and Interface Science 55 (March 1995): 1–239. http://dx.doi.org/10.1016/0001-8686(94)00226-3.

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Peng, Zhigao, Shenggui Liu, Songlei Tang, Yuechao Zhao, and Yingjun Li. "Multicomponent Lattice Boltzmann Simulations of Gas Transport in a Coal Reservoir with Dynamic Adsorption." Geofluids 2018 (July 12, 2018): 1–13. http://dx.doi.org/10.1155/2018/5169010.

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Gas adsorption occurs when the dynamic adsorption equilibrium conditions of the local adsorptive sites are broken. In the overall process of unconventional natural gas generation, enrichment, storage, and production, this phenomenon plays a significant role. A double-distribution Lattice Boltzmann model for solving the coupled generalized Navier-Stokes equation and advection-diffusion equation with respect to the gas-solid dynamic adsorption process is proposed for multicomponent gas migration in the unconventional reservoir. The effective diffusion coefficient is introduced to the model of gas transport in the porous media. The Langmuir adsorption rate equation is employed to control the adsorption kinetic process of gas-solid adsorption/desorption. The model is validated in two steps through fluid flow without and with gas diffusion-adsorption between two parallel plates filled with porous media, respectively. Simulation results indicate that with other parameters being equal, the rate of gas diffusion in the porous material and the area of the dynamic adsorption equilibrium-associated region increase with the matrix porosity/permeability. Similar results will happen with a greater saturation adsorption amount or a lower Langmuir pressure. The geometric effect on adsorption is also studied, and it is found that a higher specific surface area or free flow region can enhance the gas transport and the rate of adsorption.

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Min-Guang, Dai, and Miao Rui-Ping. "Studies on Binary Gas Solid Adsorption(IV)." Acta Physico-Chimica Sinica 11, no. 07 (1995): 596–600. http://dx.doi.org/10.3866/pku.whxb19950706.

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Zhang, Hua, Tian Ma, and Jie Zhang. "The Adsorptive Performance and Kinetics of Hemp Stem." Advanced Materials Research 332-334 (September 2011): 1676–81. http://dx.doi.org/10.4028/www.scientific.net/amr.332-334.1676.

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In view of the unique porous structure of hemp stem, the comparison experiments were implemented on adsorption properties of hemp stem powder and Abies holophylla Maxim powder to formaldehyde, benzene and TVOC. In addition, on the basis of preliminary study on solid-gas adsorption kinetics of hemp stem, applicability of several adsorption theories was analyzed versus solid-gas adsorption. The results showed that the unique structure endowed hemp stem better adsorption properties than Abies holophylla Maxim’s. However, for different adsorbents, the adsorption kinetics characters differed obviously. Bangham and Langmuir adsorption rate equation fitted the gas-solid adsorption kinetics of hemp stem to some extent, and Langmuir’s could present its absorption to TVOC much better.

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Ng, Y. L., R. Yan, L. T. S. Tsen, L. C. Yong, M. Liu, and D. T. Liang. "Volatile organic compound adsorption in a gas-solid fluidized bed." Water Science and Technology 50, no. 4 (2004): 233–40. http://dx.doi.org/10.2166/wst.2004.0271.

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Fluidization finds many process applications in the areas of catalytic reactions, drying, coating, combustion, gasification and microbial culturing. This work aims to compare the dynamic adsorption characteristics and adsorption rates in a bubbling fluidized bed and a fixed bed at the same gas flow-rate, gas residence time and bed height. Adsorption with 520 ppm methanol and 489 ppm isobutane by the ZSM-5 zeolite of different particle size in the two beds enabled the differentiation of the adsorption characteristics and rates due to bed type, intraparticle mass transfer and adsorbate-adsorbent interaction. Adsorption of isobutane by the more commonly used activated carbon provided the comparison of adsorption between the two adsorbent types. With the same gas residence time of 0.79 seconds in both the bubbling bed and fixed bed of the same bed size of 40 mm diameter and 48 mm height, the experimental results showed a higher rate of adsorption in the bubbling bed as compared to the fixed bed. Intraparticle mass transfer and adsorbent-adsorbate interaction played significant roles in affecting the rate of adsorption, with intraparticle mass transfer being more dominant. The bubbling bed was observed to have a steeper decline in adsorption rate with respect to increasing outlet concentration compared to the fixed bed. The adsorption capacities of zeolite for the adsorbates studied were comparatively similar in both beds; fluidizing, and using smaller particles in the bubbling bed did not increase the adsorption capacity of the ZSM-5 zeolite. The adsorption capacity of activated carbon for isobutane was much higher than the ZSM-5 zeolite for isobutane, although at a lower adsorption rate. Fourier transform infra-red (FTIR) spectroscopy was used as an analytical tool for the quantification of gas concentration. Calibration was done using a series of standards prepared by in situ dilution with nitrogen gas, based on the ideal gas law and relating partial pressure to gas concentration. Concentrations up to 220 ppm for methanol and 75 ppm for isobutane were prepared using this method.

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Parcher, Jon F., and Lang B. Hung. "Cooperative adsorption effects in gas—liquid—solid chromatography." Journal of Chromatography A 399 (January 1987): 75–86. http://dx.doi.org/10.1016/s0021-9673(00)96112-0.

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Tóth, József. "Thermodynamical Correctness of Gas/Solid Adsorption Isotherm Equations." Journal of Colloid and Interface Science 163, no. 2 (1994): 299–302. http://dx.doi.org/10.1006/jcis.1994.1107.

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Ladshaw, Austin, Sotira Yiacoumi, Costas Tsouris, and David DePaoli. "Generalized gas–solid adsorption modeling: Single-component equilibria." Fluid Phase Equilibria 388 (February 2015): 169–81. http://dx.doi.org/10.1016/j.fluid.2015.01.003.

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Czepirski, Leszek, and Jacek JagieŁŁo. "Virial-type thermal equation of gas—solid adsorption." Chemical Engineering Science 44, no. 4 (1989): 797–801. http://dx.doi.org/10.1016/0009-2509(89)85253-4.

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Thèses sur le sujet "Gas-solid adsorption"

Tian, Jian Atwood J. L. "Molecular organic solids for gas adsorption and solid-gas interaction." Diss., Columbia, Mo. : University of Missouri--Columbia, 2009. http://hdl.handle.net/10355/6882.

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Title from PDF of title page (University of Missouri--Columbia, viewed on Feb 24, 2010). The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. Dissertation advisor: Dr. Jerry L. Atwood. Vita. Includes bibliographical references.

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Conner, Marilyn W. "Theory of solid physisorbed films within the Potts lattice gas model /." The Ohio State University, 1986. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487266691096888.

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Mohammad, Hasan Abid Urf Turabe Ali. "Ammonia gas adsorption on metal oxide nanoparticles." Thesis, Kansas State University, 2011. http://hdl.handle.net/2097/13094.

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Master of Science Department of Mechanical and Nuclear Engineering Steven J. Eckels NanoActiveTM metal oxide particles have the ability to destructively adsorb organophosphorus compounds and chlorocarbons. These nanomaterials with unique surface morphologies are subjected to separate, low concentrations of gaseous ammonia in air. NanoActiveTM materials based on magnesium oxide have large specific surface areas and defective sites that enhance surface reactivity and consequently improved adsorptivity. In gas contaminant removal by adsorption, presence of vast specific surface area is essential for effective gas-solid interaction to take place. This is also the case in many industrial and chemical applications such as purification of gases, separation and recovery of gases, catalysis etc,. Typically carbonaceous compounds are utilized and engineered in toxic gas control systems. The purpose of this study was to compare NanoActiveTM materials with carbon based compounds in the effectivity of toxic gas adsorption at low concentrations. A test facility was designed to investigate the adsorption properties of novel materials such as adorption capacity and adsorption rate. Adsorption capacity along with adsorption kinetics is a function of properties of the adsorbent and the adsorbate as well as experimental conditions. Nanomaterials were placed on a silica matrix and tested with increasing flow rates. Electrochemical sensing devices were placed at inlet and outlet of the facility to monitor real time continuous concentration profiles. Breakthrough curves were obtained from the packed bed column experiments and saturation limits of adsorbents were measured. Adsorption rates were obtained from the breakthrough curves using modified Wheeler-Jonas equation. The NanoActiveTM materials adsorbed ammonia though to a lesser extent than the Norit® compounds. This study also included measurement of pressure drop in packed beds. This information is useful in estimating energy losses in packed bed reactors. Brauner Emmet Teller tests were carried out for the calculation of surface area, pore volume and pore size of materials. These calculations suggest surface area alone had no notable influence on adsorption capacity and adsorption rates. This lead to the conclusion that adsorption was insignificant cause of absence of functional groups with affinity towards ammonia. In brief, adsorption of ammonia is possible on NanoActiveTM materials. However functional groups such as oxy-flouro compounds should be doped with novel materials to enhance the surface interactions.

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Borchardt, Lars, Winfried Nickel, Mirian Casco, et al. "Illuminating solid gas storage in confined spaces – methane hydrate formation in porous model carbons." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-221847.

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Methane hydrate nucleation and growth in porous model carbon materials illuminates the way towards the design of an optimized solid-based methane storage technology. High-pressure methane adsorption studies on pre-humidified carbons with well-defined and uniform porosity show that methane hydrate formation in confined nanospace can take place at relatively low pressures, even below 3 MPa CH4, depending on the pore size and the adsorption temperature. The methane hydrate nucleation and growth is highly promoted at temperatures below the water freezing point, due to the lower activation energy in ice vs. liquid water. The methane storage capacity via hydrate formation increases with an increase in the pore size up to an optimum value for the 25 nm pore size model-carbon, with a 173% improvement in the adsorption capacity as compared to the dry sample. Synchrotron X-ray powder diffraction measurements (SXRPD) confirm the formation of methane hydrates with a sI structure, in close agreement with natural hydrates. Furthermore, SXRPD data anticipate a certain contraction of the unit cell parameter for methane hydrates grown in small pores.

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Borchardt, Lars, Winfried Nickel, Mirian Casco, et al. "Illuminating solid gas storage in confined spaces – methane hydrate formation in porous model carbons." Royal Society of Chemistry, 2016. https://tud.qucosa.de/id/qucosa%3A30232.

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Oliveira, Junior Nilton Geraldo de. "Projeto, construção e desenvolvimento de um calorimetro adequado ao estudo da adsorção gas/solido." [s.n.], 2007. http://repositorio.unicamp.br/jspui/handle/REPOSIP/250633.

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Orientador: Jose de Alencar Simoni Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Quimica Made available in DSpace on 2018-08-09T10:02:14Z (GMT). No. of bitstreams: 1 OliveiraJunior_NiltonGeraldode_M.pdf: 625277 bytes, checksum: e5c790f33e89db6dc410ed2f7eeef0d2 (MD5) Previous issue date: 2007 Resumo: Neste trabalho apresentam-se os aspectos do desenvolvimento de um sistema para dosagem de gás especialmente projetado para a investigação calorimétrica da adsorção de gases em sólidos. Descrevem-se a concepção e a adequação do sistema de dosagem de gás assim como a metodologia experimental adequada à utilização do referido sistema e os resultados que permitem avaliar seu desempenho. O sistema de dosagem construído consiste em uma linha de vácuo acoplada a um sensor de pressão e uma cela de adsorção dimensionada para ser inserida no calorímetro Thermométric modelo 2277. A adsorção do vapor de etanol em sílica-gel foi escolhida como "processo piloto" para os testes do desempenho do dispositivo devido à facilidade de preparação e condicionamento das substâncias e também ao grande número de dados disponíveis na literatura recente, referente às propriedades físico-químicas desse sistema. Os resultados das isotermas calorimétricas diferenciais, assim como a sistemática de condução dos experimentos nesse trabalho, é devidamente discutida comparativamente aos resultados recentes da literatura. Os resultados apontam para o fato de que o dispositivo funciona bem, dentro das expectativas químicas para o sistema piloto de adsorção utilizado Abstract: This work presents the development aspects of a gas dosage system specially projected for calorimetric investigation of the gases adsorption onto solids. They describe it conception and the adequacy of the system of dosage of gas as well as the experimental methodology adjusted to the use of the related system and the results that allow to evaluate its performance. The constructed dosage system consists of a line of vacuum connected to a pressure sensor and a dimensioned adsorption cell to be inserted in the Thermométric calorimeter model 2277. The adsorption of the ethanol vapor on silica-gel was chosen as "pilot process" for the tests of the device performance due to easiness of preparation and conditioning of substances and also to great number of available data in recente literature, referring to physical-chemistry properties of this system. The differential calorimetric isothems results as well as the systematics of conduction of the experiments in this work, are duly argued comparativily to the recent results of literature. The results show that the device functions well in respect of the chemical expectations for the adsorption pilot process used Mestrado Físico-Química Mestre em Química

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Grima, N. M. M. "Kinetic and mass transfer studies of ozone degradation of organics in liquid/gas-ozone and liquid/solid-ozone systems." Thesis, University of Bradford, 2009. http://hdl.handle.net/10454/3351.

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This work was concerned with the determination of mass transfer and kinetic parameters of ozone reactions with four organic compounds from different families, namely reactive dye RO16, triclocarban, naphthalene and methanol. In order to understand the mechanisms of ozone reactions with the organic pollutants, a radical scavenger (t-butanol) was used and the pH was varied from 2 to 9. Ozone solubility (CAL*) is an important parameter that affects both mass transfer rates and chemical reaction kinetics. In order to determine accurate values of the CAL* in the current work, a set of experiments were devised and a correlation between CAL* and the gas phase ozone concentration of the form CAL*(mol/L) = 0.0456 CO3 (g/m3 NTP) was obtained at 20°C. This work has also revealed that t-butanol did not only inhibit hydroxyl radical reactions but also increased mass transfer due to it increasing the specific surface area (aL). Values of the aL were determined to be 2.7 and 3.5 m2/m3 in the absence and presence of t-butanol respectively. It was noticed that the volumetric mass transfer coefficient (kLa) has increased following the addition of t-butanol. Ozone decomposition was studied at pH values of 2 to 9 in a 500 mL reactor initially saturated with ozone. Ozone decomposition was found to follow a second order reaction at pH values less than 7 whilst it was first order at pH 9. When the t-butanol was added, the decomposition of ozone progressed at a lower reaction order of 1.5 for pH values less than 7 and at the same order without t-butanol at pH 9. Ozone decomposition was found significant at high pHs due to high hydroxide ion concentration, which promotes ozone decomposition at high pHs. The reaction rate constant (k) of RO16 ozonation in the absence of t-butanol was determined. The result suggests that RO16 degradation occurs solely by molecular ozone and indirect reactions by radicals are insignificant. The chemical reaction of triclocarban with ozone was found to follow second order reaction kinetics. The degradation of naphthalene using the liquid/gas-ozone (LGO) system was studied. This result showed that hydroxyl radicals seemed to have limited effect on naphthalene degradation which was also observed when a radical scavenger (t-butanol) was used. Reaction rate constants were calculated and were found around 100 times higher than values reported in the literature due to differences in experimental conditions. From the results of the experimental investigation on the degradation of methanol by ozone it was found that the rate constant (k) of the degradation reaction increased at pH 9. The reaction stoichiometry was found to have a value of 1 mol/mol. The two steps of the liquid/solid-ozone (LSO) system were studied on beds of silica gel and a zeolitic material (D915) and the ozone adsorption process was modeled and found that particle rate controls ozone adsorption step but liquid rate controls the water treatment step. Ozone desorption with pure deionised water was studied. The water flow rate was found to accelerate the desorption rates but pH was found to decrease the desorption rates. In contrast, the effect of pH was insignificant in the presence of t-butanol. Determination of the adsorption isotherms for RO16, naphthalene and methanol revealed that RO16 did not exhibit adsorption on silica gel, but both naphthalene and methanol showed adsorption on D915 described by Langmuir model.

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Ghasemian, Langeroudi Elahe. "Quantitative aspects of CO₂-grafted amine interactions in gas-liquid-solid solubility equilibrium : applications to CO₂ capture." Master's thesis, Université Laval, 2010. http://hdl.handle.net/20.500.11794/21467.

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Les effets liés à la présence d'eau liquide sur la capacité d'adsorption de CO₂ par une silice mésoporeuse de type SBA-15 fonctionnalisée au moyen des amines suivantes: aminopropyltrimethoxysilane (APS) et N-(2-aminoéthyl) -3 - (aminopropyl) trimethoxysilane (AEAPS) ont été examinés pour évaluer le potentiel de ce mode de contact dans des laveurs gaz-liquide-solide. Les résultats ont été comparés à la capacité d'adsorption de CO₂ des amines greffées dans des conditions humides et sèches ainsi qu'à la capacité d'absorption de CO₂ dans les systèmes gaz-liquide avec des solutions aqueuses d'aminés ayant des structures semblables à celles des amines greffées. Dans ces conditions, une estimation de l'adsorption physique de CO₂ a été obtenue par l'étude de la SB A-15 non-modifiée. En outre, afin d'évaluer l'efficacité et la stabilité à long terme de l'association amine/SBA-15, les amines greffées ont été soumises à huit cycles successifs d'immersion dans les milieux aqueux d'une durée de 24 h chacune. Les échantillons récupérés ont été caractérisés au moyen de la diffraction aux rayons, des isothermes de sorption d'azote et d'analyse élémentaire CHN. Jusqu'à 40% de la quantité d'aminés greffées a subi une lixiviation durant les quelques premiers cycles de régénération; par la suite, la teneur en azote de l'AEAPS est demeurée relativement stable, contrairement à l'APS qui a connu une moindre stabilité. Fait intéressant, les structures des deux matériaux greffés, APS et AEAPS, sont demeurées intactes après plusieurs expositions à l'eau. L'efficacité de capture de CO₂ la plus élevée a été obtenue dans le cas des amines aqueuses (voie homogène). Cependant, la capture de CO₂ à l'aide d'aminés greffées dans le cas du système triphasique (gaz-liquide-solide) a donné lieu, pour des conditions opératoires comparables, à des valeurs intermédiaires entre les voies sèche et humide du mode de contact gaz-solide.

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Hommeril, François. "Etude théorique et expérimentale de la coadsorption sur surface homogène : cas du mélange (Kr, CH4) sur Graphite et MgO." Vandoeuvre-les-Nancy, INPL, 1991. http://docnum.univ-lorraine.fr/public/INPL_T_1991_HOMMERIL_F.pdf.

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Les données thermodynamiques du mouillage tridimensionnel, appliquées à l'adsorption, considéré comme un phénomène de mouillage bidimensionnel, permettent de schématiser simplement le comportement d'une couche mixte adsorbée. Il apparait que la condensation et le déplacements d'un gaz dans un alliage binaire adsorbé dépendent des potentiels chimiques des phases gazeuses à l'équilibre avec les constituants du mélange et des conditions de condensation des mêmes corps mais en phase pure. La résolution d'un modèle thermodynamique statistique s'appuyant sur l'approximation de Bregg-Williams et la simulation numérique de la coadsorption par la méthode de monte Carlo confirment et affinent ce phénomène. On montre notamment que plus l'affinité électrostatique entre les gaz est forte, plus la lacune de miscibilité est étendue. L'etude expérimentale, menée sur les systèmes Krypton-Méthane adsorbés sur graphite exfolié et MgO, a permis, en confirmant les différents résultats des modèles, de mettre en évidence quelques points remarquables. Ainsi, sur le graphite, l'augmentation de la pression partielle en méthane, induit-elle la démission d'une phase liquide dans un alliage solide constitue du melange krypton-methane. C'est la rétro-fusion bidimensionnelle. Sur le MgO, la nature des phases reste mal définie, mais il a été montré que la solution bidimensionnelle formée s'écarte notablement de l'idéalité

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Kabir, Hocine. "Adsorption de mélanges de gaz en lit fixe, modulée en température et en pression : expérience, modélisation, simulations." Vandoeuvre-les-Nancy, INPL, 1993. http://www.theses.fr/1993INPL139N.

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Cette étude concerne les procédés d'adsorption de gaz pour lesquels la régénération de l'adsorbant est effectuée principalement par augmentation de la température. Les adsorbants sont des tamis moléculaires et les gaz utilisés expérimentalement sont essentiellement des alcanes et du dioxyde de carbone. En vue de modéliser de tels procédés, on effectue une description détaillée des différents phénomènes impliqués. Ainsi, on propose des modèles thermodynamiques pour décrire les équilibres multiconstituants gaz-solide à partir de mesures des isothermes des gaz purs ou de mesures de perturbations chromatographiques, ainsi que les méthodes expérimentales associées. On considère que le transfert de matière gaz-solide est représenté par une diffusion interne au grain uniquement. Le transfert de chaleur est étudié tant au niveau du grain d'adsorbant qu'au niveau de la colonne pour laquelle on envisage les trois cas : isotherme, adiabatique et intermédiaire. On étudie également le cas d'un mélange contenant un gaz condensable. La résolution numérique des équations conduit à un logiciel de simulation. Les simulations réalisées permettent d'explorer l'influence des paramètres opératoires sur l'histoire des concentrations en sortie de colonne, en saturation et en régénération, notamment l'influence du transfert de matière, du transfert de chaleur gaz-adsorbant, des pertes de chaleur a la paroi, de la température du gaz de régénération dans le cas d'une espèce condensable.

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Livres sur le sujet "Gas-solid adsorption"

Mei ceng zhong de ou he yun dong li lun ji qi ying yong: Ju you xi fu zuo yong de qi gu ou he yun dong li lun. Ke xue chu ban she, 2009.

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Staudt, Reiner, and Jürgen U. Keller. Gas Adsorption Equilibria: Experimental Methods and Adsorptive Isotherms. Springer, 2010.

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Gas Adsorption Equilibria: Experimental Methods and Adsorptive Isotherms (Microsystems). Springer, 2004.

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Equilibria and dynamics of gas adsorption on heterogeneous solid surfaces. Elsevier, 1997.

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Equilibria and Dynamics of Gas Adsorption on Heterogeneous Solid Surfaces. Elsevier, 1997. http://dx.doi.org/10.1016/s0167-2991(97)x8062-0.

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Physical interactions and energy exchange at the gas-solid interface. Faraday Division, Royal Society of Chemistry, 1985.

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Air, Gas, and Water Pollution Control Using Industrial and Agricultural Solid Wastes Adsorbents. Taylor & Francis Group, 2017.

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Chapitres de livres sur le sujet "Gas-solid adsorption"

Endo, Takeshi. "Gas Adsorption on Surface of Solid Materials." In Measurement Techniques and Practices of Colloid and Interface Phenomena. Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-5931-6_17.

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Rudziński, W. "Fundamentals of Single-Gas and Mixed-Gas Adsorption on Heterogeneous Solid Surfaces." In Physical Adsorption: Experiment, Theory and Applications. Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5672-1_9.

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King, Jerry W. "Supercritical Fluid Adsorption at the Gas-Solid Interface." In ACS Symposium Series. American Chemical Society, 1987. http://dx.doi.org/10.1021/bk-1987-0329.ch013.

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Findenegg, G. H. "Principles of Adsorption at Solid Surfaces and their Significance in Gas/Solid and Liquid/Solid Chromatography." In Theoretical Advancement in Chromatography and Related Separation Techniques. Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2686-1_8.

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Bolis, Vera. "Fundamentals in Adsorption at the Solid-Gas Interface. Concepts and Thermodynamics." In Calorimetry and Thermal Methods in Catalysis. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-11954-5_1.

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Johnson, Jeffrey Allan. "Erika Cremer and the Origins of Gas–Solid Adsorption Chromatography, 1944–1947." In ACS Symposium Series. American Chemical Society, 2018. http://dx.doi.org/10.1021/bk-2018-1311.ch007.

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Bräuer, P., M. Salem, M. v. Szombathely, M. Heuchel, P. Halting, and M. Jaroniec. "Problems Associated with Thermodynamic Analysis of Gas-Solid Adsorption Isotherms Measured at High Pressures." In The Kluwer International Series in Engineering and Computer Science. Springer US, 1996. http://dx.doi.org/10.1007/978-1-4613-1375-5_11.

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Do, Duong D., Eugene A. Ustinov, and Ha D. Do. "Porous Texture Characterization from Gas-Solid Adsorption." In Adsorption by Carbons. Elsevier, 2008. http://dx.doi.org/10.1016/b978-008044464-2.50015-8.

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"Adsorption at Gas-Solid Interfaces." In Principles of Colloid and Surface Chemistry, Revised and Expanded. CRC Press, 2016. http://dx.doi.org/10.1201/9781315274287-17.

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"Adsorption at the Solid-Gas Interface." In Fundamentals of Interface and Colloid Science. Elsevier, 1995. http://dx.doi.org/10.1016/s1874-5679(06)80004-8.

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Actes de conférences sur le sujet "Gas-solid adsorption"

Pacheco, K. A., and R. Guirardello. "Isotherm parameters for gas-solid adsorption using Monte Carlo simulation." In INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS (ICNAAM 2017). Author(s), 2018. http://dx.doi.org/10.1063/1.5044108.

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Brancher, Ricardo D., Stefan Stefanov, Irina Graur, and Aldo Frezzotti. "Kinetic theory description of gas adsorption-desorption on a solid surface." In 31ST INTERNATIONAL SYMPOSIUM ON RAREFIED GAS DYNAMICS: RGD31. AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5119656.

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Easter, Steven R., Christopher H. Baker, and Pamela M. Norris. "Temperature-Dependent Adsorption of Argon on Gold: A Molecular Dynamics Study." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-38629.

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When a gas and solid surface are brought into contact, some gas atoms may adsorb onto the surface, forming one or more denser layers. Adsorption has direct uses in many technologies, for instance filtration and pharmacology, and the prevalence of gas-solid interfaces means that it impacts many other technologies. However much is still unknown concerning the microscopic dynamics of adsorption. To investigate the effect of temperature on adsorption, molecular dynamics simulations were performed on an interface between solid gold and gaseous argon. The gas was placed in contact with the solid, allowing adsorption of gas atoms under a constant system temperature. The results of the simulations were analyzed to study the effect of temperature on the density of the adsorbed layer and its rate of formation. When brought into contact, the gas adsorbed to form one or more layers, the density of which was found to be strongly temperature-dependent. A monolayer was observed for temperatures above 150 K while below that value a secondary layer formed. Simulations above 450 K showed an exponential relationship between mean steady-state density and temperature of the form Deq = αeβT.

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Murthy, D. S., S. V. Sivakumar, Keshav Kant, and D. P. Rao. "Process Intensification in a ‘Simulated Moving-Bed’ Heat Regenerator." In ASME 2004 Heat Transfer/Fluids Engineering Summer Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/ht-fed2004-56297.

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The solid-gas contacting for thermal storage and thermal recovery is generally carried out in fixed-bed regenerators. Compared to a fixed bed, higher thermal recovery can be achieved in a moving bed with countercurrent flow of gas and solids. However, the moving beds have not been widely used due to difficulties in solid handling. The relative movement of the bed to the gas flow can be simulated in a fixed bed by moving the inlet and outlet ports of the gas along the length of the bed. Similar simulated moving-beds are already in use for adsorptive separation of liquid mixtures in chemical industries. A Novel Moving-Port system is proposed to achieve simulated moving-bed operation in a fixed bed. We have carried out studies to evaluate the relative performance of the fixed and the simulated moving bed heat regenerators. We have examined the feasibility of replacing a set of three blast furnaces and thermal regeneration of an adsorption bed with the simulated moving-bed regenerator. It is found that high heat transfer intensification can be achieved. The results indicate that the volume of the Simulated Moving-Bed regenerator required is about 100 times smaller than the blast-furnace stoves. The heat transfer intensification is high enough to carry out thermal regeneration of the adsorption beds in a cycle time that is in the range of the pressure swing adsorption, which is favored for its faster rate of regeneration.

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Asay, David B., Michael T. Dugger, and Seong H. Kim. "Effects of Gas Adsorption in Nanotribology and Demonstration of In-Situ Vapor Phase Lubrication of MEMS Devices." In ASME/STLE 2007 International Joint Tribology Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/ijtc2007-44419.

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This paper discusses the important role of gas adsorption in nanotribology and demonstrates in-situ vapor phase lubrication of microelectromechanical systems (MEMS) devices. We have elucidated the molecular ordering and thickness of the adsorbed water layer on the clean silicon oxide surface and found the molecular-level origin for the high adhesion between nano-asperity silicon oxide contacts in humid ambient. The same gas adsorption process can be utilized for continuous supply of lubricant molecules to form a few Å thick lubricant films on solid surfaces. Using alcohol vapor adsorption, we demonstrated that the adhesion, friction, and wear of the silicon oxide surface can significantly be reduced. This process made it possible to operate sliding MEMS without failure for an extended period of time.

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Wang, H., J. Q. Bai, Z. G. Qu, Y. Wang, and Y. Zhang. "A Combined GCMC and FVM Simulation Method for CO2 Adsorption in 13X Zeolite Adsorption Bed." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-87009.

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A multi-scale method combining the finite volume model (FVM) considering Darcy-Brinkman formulation with grand conical Monte Carlo (GCMC) is built to study the process of CO2 adsorption in 13X zeolite particle bed. The saturation adsorption capacities and adsorption heat in FVM method are calculated by Langmuir model and linear fitting formula, respectively. The GCMC method is used to obtain the parameters of Langmuir model and linear fitting formula. The multi-scale method overcomes the shortcomings of the saturation adsorption capacities restricted by level of experimentation or empirical formula. The relationship between adsorption heat and adsorption amount is also obtained. The value of adsorption heat is no longer treated as the constant value or obtained from the empirical formula. The effects of velocity, particle size, porosity and thermal conductivity of particle on CO2 adsorption in13X zeolite particle bed are investigated. The results show that the saturation adsorption time decreases with increased velocity, porosity and thermal conductivity of particle, while increases with increased particle size. The peak of temperature difference between the solid and gas phase increases with increased inlet velocity, porosity and particle size, while decreases with thermal conductivity of particle. The temperature difference trends uniformity and the peak of temperature difference moves towards to the outlet of adsorption bed with adsorption time processing. The adsorption bed with a higher inlet velocity, porosity and thermal conductivity of particle, and smaller particle size is recommended to improve the adsorption bed performance.

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Wen, Dongsheng, T. N. Cong, and Yulong Ding. "HEAT TRANSFER OF GAS-SOLID TWO-PHASE FLOWS IN A NOVEL SYSTEM FOR NON-PERIODIC ADSORPTION ENAHNCED CHEMICAL REACTION PROCESSES." In Annals of the Assembly for International Heat Transfer Conference 13. Begell House Inc., 2006. http://dx.doi.org/10.1615/ihtc13.p12.440.

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Haghshenas, Alireza, and Mohammad Hamedpour. "Adsorption Modeling of CO2 and CH4 in Nanopores Using Simplified Local Density Model: Application in Enhanced Hydrocarbon Recovery in Unconventional Reservoirs." In International Petroleum Technology Conference. IPTC, 2021. http://dx.doi.org/10.2523/iptc-21296-ms.

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Abstract Adsorption isotherms of methane and carbon dioxide adsorption isotherms on shale samples are measured and the simplified local density (SLD) model is used to match the experimental data. The SLD equation also has the generic modeling capabilities to draw the deviation from bulk properties as a function of fluid-solid interaction energies. Still, compared to other available techniques such as molecular simulation, SLD has an advantage of mathematical simplicity and being run at shorter time interval. The model also has satisfactory potential to paint the underlying mechanisms for adsorption preference of one fluid component over the other. The higher adsorption preference of carbon dioxide is reflected in the measurement data and the adsorption model is successfully used to fit the data. In addition to different critical properties of carbon dioxide compared to methane, the main important factor that may describe the high adsorption affinity of carbon dioxide is the fluid-solid potential energy. As shown in this work, the potential energy function shows deeper well depth, the deeper the well depth, the stronger the interaction between the fluid particles and solid surface. By storing gas in high density, liquid like adsorbed phase, the adsorption mechanism can enhance the overall storage capacity of CO2 in deep reservoir rock relative to if there were a free phase alone.

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Avanessian, Tadeh, and Gisuk Hwang. "Adsorption-Controlled Thermal Switch Using Nonequilibrium Molecular Dynamics Simulation." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-66707.

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A thermal switch is a system to control the heat transfer “on/off” for the desired functionalities, and this serves as a basic building block to design advanced thermal management systems in various applications including electronic packaging, waste heat recovery, cryogenic cooling, and new applications such as thermal computers. The existing thermal switches employ the macroscale mechanical-based, relatively slow transient “on/off” switch mechanisms, which may be challenging to provide solutions for micro/nanoscale applications. In this study, a fast and efficient thermal switch mechanism without having extra mechanical controlling system is demonstrated using gas-filled, heterogeneous nanogaps with asymmetric surface interactions in Knudsen regime. Argon gas atoms confined in metal-based solid surfaces are employed to predict the degree of thermal switch, S. Non-equilibrium molecular dynamics simulation is used to create the temperature gradient over the two nanogaps, and the maximum degree of thermal switch is Smax ∼ 13, which results from the difference in adsorption-controlled thermal accommodation coefficient (TAC) and pressure between the two sides of the gaps.

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Avanessian, Tadeh, and Gisuk Hwang. "Adsorption-Controlled Thermal Diode: Nonequilibrium Molecular Dynamics Simulation." In ASME 2016 14th International Conference on Nanochannels, Microchannels, and Minichannels collocated with the ASME 2016 Heat Transfer Summer Conference and the ASME 2016 Fluids Engineering Division Summer Meeting. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/icnmm2016-7936.

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A thermal diode is a system controlling the heat transfer preferentially in one direction. This serves as a basic building block to design advanced thermal management systems in energy saving applications and to provide implications to design new application such as thermal computers. The development of the thermal diode has been of great interest as electrical diodes have similarly made significant impacts on modern industries. Numerous studies have demonstrated thermal diode mechanisms using non-linear heat transfer mechanisms, but the main challenges in current systems are poor steady-state performance, slow transient response, and/or extremely difficult manufacturing for the viable solutions. In this study, an adsorption-based thermal diode is examined for a fast and efficient thermal diode mechanism as a completely new class, using a gas-filled, heterogeneous nanogap with asymmetric surface interactions in Knudsen regime. Ar gas atoms confined in Pt-based solid surfaces are selected to predict the degree of rectification, R ∼ 10, using non-equilibrium molecular dynamics simulation with the nanogap size of Lz = 20 nm and ΔT = 20 K for various average plate temperatures, 80 < T < 130 K. Different surface energies for the thermal diode is studied and a maximum degree of rectification, Rmax ∼ 10, is found at T = 80 K which results from the significant adsorption-controlled thermal accommodation coefficient (TAC). The obtained results provide insights into the design of advanced thermal management systems including thermal switches and thermal computing systems.

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