Abstract
A method for predicting adsorption equilibrium using a modified Dubinin–Radushkevich (D–R) equation is presented in this paper. We focus on adsorption of pure organic compounds on BPL-activated carbon. We introduce a new variable k v, a volume adjusting coefficient, and simply use V b, the constant molar volume of the adsorbate at its normal boiling temperature, instead of V m, the temperature-dependent molar volume of the adsorbate at the adsorption temperature. The model parameters in the modified D–R equation for an adsorbate are predicted from V b. Overall, the modified D–R equation gives more accurate results than the traditional one.
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