Measuring and modeling supercritical adsorption in porous solids : carbon dioxide on 13X zeolite and on silica gel

Hocker, Thomas; Rajendran, Arvind; Mazzotti, Marco

doi:10.1021/la0266379

Publication type:	Article in scientific journal
Type of review:	Peer review (publication)
Title:	Measuring and modeling supercritical adsorption in porous solids : carbon dioxide on 13X zeolite and on silica gel
Authors:	Hocker, Thomas Rajendran, Arvind Mazzotti, Marco
DOI:	10.1021/la0266379
Published in:	Langmuir
Volume(Issue):	19
Issue:	4
Page(s):	1254
Pages to:	1267
Issue Date:	2003
Publisher / Ed. Institution:	American Chemical Society
ISSN:	0743-7463 1520-5827
Language:	English
Subjects:	Lattice; Supercritical; Theory; Adsorption
Subject (DDC):	530: Physics
Abstract:	Supercritical adsorption of carbon dioxide on 13X zeolite pellets and on silica gel is studied experimentally and theoretically. A gravimetric apparatus with provision for in situ density measurement is used for the measurement of excess adsorption isotherms. The volume of the adsorbent and the other solid parts in the measuring cell, which in turn affects the accuracy of the excess isotherms, is estimated by accounting for helium adsorption on the adsorbent. A model based on lattice density functional theory is introduced and used to analyze the effect of geometric confinement on excess adsorption isotherms under supercritical conditions. This is then used to describe adsorption on adsorbents with different pore size distributions, in particular for the systems that have been experimentally studied. The experimental data and the model results are compared, and their satisfactory agreement is discussed. Features such as "bumps" on the descending part of the excess adsorption isotherms in the CO2-13X zeolite system are discussed and explained using the model.
URI:	https://digitalcollection.zhaw.ch/handle/11475/1669
Fulltext version:	Published version
License (according to publishing contract):	Licence according to publishing contract
Departement:	School of Engineering
Organisational Unit:	Institute of Computational Physics (ICP)
Appears in collections:	Publikationen School of Engineering

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Hocker, T., Rajendran, A., & Mazzotti, M. (2003). Measuring and modeling supercritical adsorption in porous solids : carbon dioxide on 13X zeolite and on silica gel. Langmuir, 19(4), 1254–1267. https://doi.org/10.1021/la0266379

Hocker, T., Rajendran, A. and Mazzotti, M. (2003) ‘Measuring and modeling supercritical adsorption in porous solids : carbon dioxide on 13X zeolite and on silica gel’, Langmuir, 19(4), pp. 1254–1267. Available at: https://doi.org/10.1021/la0266379.

T. Hocker, A. Rajendran, and M. Mazzotti, “Measuring and modeling supercritical adsorption in porous solids : carbon dioxide on 13X zeolite and on silica gel,” Langmuir, vol. 19, no. 4, pp. 1254–1267, 2003, doi: 10.1021/la0266379.

HOCKER, Thomas, Arvind RAJENDRAN und Marco MAZZOTTI, 2003. Measuring and modeling supercritical adsorption in porous solids : carbon dioxide on 13X zeolite and on silica gel. Langmuir. 2003. Bd. 19, Nr. 4, S. 1254–1267. DOI 10.1021/la0266379

Hocker, Thomas, Arvind Rajendran, and Marco Mazzotti. 2003. “Measuring and Modeling Supercritical Adsorption in Porous Solids : Carbon Dioxide on 13X Zeolite and on Silica Gel.” Langmuir 19 (4): 1254–67. https://doi.org/10.1021/la0266379.

Hocker, Thomas, et al. “Measuring and Modeling Supercritical Adsorption in Porous Solids : Carbon Dioxide on 13X Zeolite and on Silica Gel.” Langmuir, vol. 19, no. 4, 2003, pp. 1254–67, https://doi.org/10.1021/la0266379.