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Title: Multicomponent adsorption kinetics of gases in activated carbon: Effect of pore size distribution

Abstract

Adsorption by activated carbon is an efficient tool for gas separation and in the environmental control of chemical process industries. However, the complex micropore and surface phenomena involved in carbon adsorption have not been adequately investigated, especially for multicomponent systems. It has been observed that activated carbon is heterogeneous in the sense that it has a range of micropore size distribution. The heterogeneous structure of activated carbon is studied by using a pore size distribution concept. The pore size is related to the adsorbate-adsorbent interaction energy by the Lennard-Jones potential. The competition of different species for a given pore is considered via their own interaction strength with the local micropore. A pore and surface diffusion model taking into account the pore size distribution is proposed to investigate the effect of surface heterogeneity on the prediction of binary sorption kinetics. The results are compared with those previously obtained using a uniform energy distribution.

Authors:
; ;
Publication Date:
Research Org.:
Hong Kong Univ. of Science and Technology, Clear Water Bay (HK)
OSTI Identifier:
20000007
Resource Type:
Journal Article
Journal Name:
Langmuir
Additional Journal Information:
Journal Volume: 15; Journal Issue: 19; Other Information: PBD: 14 Sep 1999; Journal ID: ISSN 0743-7463
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 54 ENVIRONMENTAL SCIENCES; ACTIVATED CARBON; SORPTIVE PROPERTIES; ADSORPTION; KINETICS; PORE STRUCTURE; GASES; AIR POLLUTION CONTROL

Citation Formats

Hu, X., Qiao, S., and Do, D.D. Multicomponent adsorption kinetics of gases in activated carbon: Effect of pore size distribution. United States: N. p., 1999. Web. doi:10.1021/la981460x.
Hu, X., Qiao, S., & Do, D.D. Multicomponent adsorption kinetics of gases in activated carbon: Effect of pore size distribution. United States. doi:10.1021/la981460x.
Hu, X., Qiao, S., and Do, D.D. Tue . "Multicomponent adsorption kinetics of gases in activated carbon: Effect of pore size distribution". United States. doi:10.1021/la981460x.
@article{osti_20000007,
title = {Multicomponent adsorption kinetics of gases in activated carbon: Effect of pore size distribution},
author = {Hu, X. and Qiao, S. and Do, D.D.},
abstractNote = {Adsorption by activated carbon is an efficient tool for gas separation and in the environmental control of chemical process industries. However, the complex micropore and surface phenomena involved in carbon adsorption have not been adequately investigated, especially for multicomponent systems. It has been observed that activated carbon is heterogeneous in the sense that it has a range of micropore size distribution. The heterogeneous structure of activated carbon is studied by using a pore size distribution concept. The pore size is related to the adsorbate-adsorbent interaction energy by the Lennard-Jones potential. The competition of different species for a given pore is considered via their own interaction strength with the local micropore. A pore and surface diffusion model taking into account the pore size distribution is proposed to investigate the effect of surface heterogeneity on the prediction of binary sorption kinetics. The results are compared with those previously obtained using a uniform energy distribution.},
doi = {10.1021/la981460x},
journal = {Langmuir},
issn = {0743-7463},
number = 19,
volume = 15,
place = {United States},
year = {1999},
month = {9}
}