Adsorption and desorption kinetics for hydrophilic and hydrophobic vapors on activated carbon

Fletcher, A.J. and Yuzak, Y. and Thomas, K.M. (2006) Adsorption and desorption kinetics for hydrophilic and hydrophobic vapors on activated carbon. Carbon, 44 (5). pp. 989-1004. ISSN 0008-6223 (http://dx.doi.org/10.1016/j.carbon.2005.10.020)

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Abstract

Adsorption dynamics are of fundamental importance in applications of adsorbents in real situations. The adsorption/desorption characteristics of a series of adsorbates, with varying hydrophilic/hydrophobic and structural characteristics, for activated carbon BAX950, were investigated for temperatures in the range 288-323 K. These data provide a comprehensive kinetic study of adsorption/desorption for an activated carbon. The results are discussed in relation to the adsorbent pore structure and functional group concentration, adsorptive structure and adsorption mechanism. The study provides evidence for a compensation effect where activation energy and ln(pre-exponential factor) parameters obtained from the Arrhenius equation exhibit a linear correlation.

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