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Competitive adsorption of a benzene-toluene mixture on activated carbons at low concentration

Lookup NU author(s): Dr Ashleigh Fletcher, Emeritus Professor Mark Thomas

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Abstract

Previous studies of the adsorption of benzene and toluene at low concentration showed that both porosity and surface chemistry of the activated carbon play an important role. This paper analyses the adsorption behaviour of a mixture of VOCs (benzene-toluene) on AC, due to the lack of information regarding the adsorption of mixtures. Thus, the performance of chemically activated carbons, physically activated carbon with steam and commercial samples is studied. This study shows that chemically activated carbons have better performance than the other samples, showing much higher adsorption capacities, breakthrough times and separation times. Porosity is a key factor and those activated carbons with higher volumes of micropores exhibit higher adsorption capacities and breakthrough times. This work also analyses the state of the adsorbed phase resulting from the mixture adsorption and comparison of the composition of the adsorbed hydrocarbons with that predicted by the ideal adsorption solution theory (IAST), shows good agreement. © 2005 Elsevier Ltd. All rights reserved.


Publication metadata

Author(s): Lillo-Rodenas MA, Fletcher AJ, Thomas KM, Cazorla-Amoros D, Linares-Solano A

Publication type: Article

Publication status: Published

Journal: Carbon

Year: 2006

Volume: 44

Issue: 8

Pages: 1455-1463

ISSN (print): 0008-6223

ISSN (electronic): 1873-3891

Publisher: Pergamon

URL: http://dx.doi.org/10.1016/j.carbon.2005.12.001

DOI: 10.1016/j.carbon.2005.12.001


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