Breakthrough modeling and experimental design for o -xylene dynamic adsorption onto clay material

Abstract

The adsorption of o-xylene onto raw clay material in a fixed bed using a thermal conductivity detector gas chromatography was investigated. Experimental and theoretical studies were established to evaluate the removal efficiency of o-xylene by adsorption on clay materials and to predict kinetic parameters. Column data were describing at different conditions using Bohart–Adams, Wolborska, Thomas, Yoon and Nelson, dose–response, and bed depth service time models. All used models were satisfactory to predict the breakthrough curves. A suitable advection–dispersion–sorption (ADS) model has been also developed to simulate the measured data, based on the nature of the various equilibrium relationships of solid–gas and diverse descriptions of the mass transfer processes within of the adsorbent particle. The experiments can be fitted with high correlated coefficient R ² = 0.996.

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