Determination of adsorption of toluene and acetone vapors on perlite and pumice volcanic rocks using the chromatographic technique

Abstract

Adsorption of dilute toluene vapor and acetone vapor on expanded perlite and pumice was carried out with chromatographic method at 40-110 ํC. The adsorption equilibrium constant and the adsorption rate constant for each adsorbent-adsorbate system was determined from the first absolute moment and the second central moment of the corresponding chromatogram, respectively. The equilibrium constants for acetone on both perlite and pumice were greater than for toluene on the same adsorbents. In addition, the equilibrium constant varied inversely with the particle sizes. While the adsorption rate constants for toluene on both adsorbents were greater than that for acetone. The heats of adsorption for acetone were greater than the heat of condensation up to two folds. While the heats of adsorption for toluene were than the condensation heat down to a half of it.