The effect of solvent and mobile‐phase composition on adsorption characteristics in liquid‐phase absorption is studied. Comparing experimental adsorption data for several organics in both gas‐ and liquid‐phase systems confirms that adsorption equilibrium constant K and isosteric heat of adsorption Qst are smaller than those in corresponding gaseous systems. The logarithm of K almost linearly increases as methanol composition decreases. Solvophobic theory applied quantitatively analyzes these solvent effects. Estimation methods for three parameters influence calculation results: solvent effects on K can be quantitatively analyzed; the adsorbability of adsorbates can be estimated from the value of ΔGsolv for each homologue in a reversed‐phase liquid chromatographic system; and the solvent effect on Qst cannot be satisfactorily interpreted. It is, however, confirmed that Qst is influenced by a solvent and an apparent small value is observed in liquid‐phase adsorption.
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Miyabe et al. (1995) studied this question.
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