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Activated Adsorption/Desorption of Cyclohexane over Activated Carbon Fiber with Molecular Sieving Property

Yusaku Sakata, Takemi Namba, Yoshiaki Inoue, Eiji Tanaka, Shigeaki Kasaoka

Abstract

Activated adsorption of cyclohexane (C6H12) was discussed over the activated carbon fibers (ACF) prepared from phenolic resin fabric. Three ACF samples used were different only of their activation levels. Benzene and chloroform vapors were adsorbed over all the ACF samples. However adsorptions of C6H12 and CCl4 over the poorly activated ACF were slightly limited by molecular effect. Rates of adsorption with molecular sieving effect was found to be composed of two steps; a fast-adsorption (FA) at initital stage followed by a slow-adsorption (SA). The latter process was an activated adsorption, and the desorption was not easy even at the boiling temperature of the adsorbate.

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Key concepts: Adsorption, Cyclohexane, Activated carbon, Benzene, Desorption, Chloroform, Boiling point, Fiber