Liquid-phase Adsorption from Binary Solutions on Silica Gel. The Apparent Separation Factors and the Distribution of Adsorption Sites

スポンサーリンク

概要

• 論文の詳細を見る

• The liquid-phase adsorption equilibrium of a cyclohexane-benzene mixture on a silica-gel surface, containing various quantities of physically-adsorbed water, has been studied at 30°C. The apparent separation factors (α<SUP>ap</SUP>) have been determined on the assumption that this liquid-phase adsorption is of the Langmuir-type. It was found that the values of α<SUP>ap</SUP> were, in general, markedly affected not only by the composition of binary solvents, but also by the amounts of physically-adsorbed water. In order to discuss this point quantitatively, the theoretical equation for estimating the apparent separation factors on a complicated solid surface having two or more types of adsorption sites has been derived on the basis of the theory of chemical equilibrium. The following three types of adsorption sites have been assumed to exist on the silica-gel surface used in this experiment: the surface silanol (σ<SUB>1</SUB>), the monolayer of water (σ<SUB>2</SUB>), and the multilayer of water (σ<SUB>3</SUB>). The separation factors of the σ<SUB>1</SUB> and σ<SUB>3</SUB> were experimentally measured as 17.1 and 2.5. By best-fitting the above theoretical equation for α<SUP>ap</SUP> with the observed values, the separation factor of the σ<SUB>2</SUB> site was taken to be 3.7 and the distribution of each adsorption site on the surface was determined.

• 公益社団法人 日本化学会の論文

著者

• Kagiya Tsutomu

  Faculty of Engineering Kyoto University

• Sumida Yuzo

  Faculty of Engineering, Kyoto University

• Tachi Toshihiro

  Faculty of Engineering, Kyoto University

関連論文

• Polymerization of Olefines by Ziegler Catalyst. III. Polymerization of Ethylene by AlEt3-TiCl3 Catalyst
• An Infrared Spectroscopic Study of Hydrogen Bonds. The Liquid-Liquid Interaction of Solvents with Trimethylsilanol
• Liquid-phase Adsorption from Binary Solutions on Silica Gel. The Apparent Separation Factors and the Distribution of Adsorption Sites

スポンサーリンク