A Practical Isotherm Equation for Adsorption on a Heterogeneous Surface and Its Applications to Single and Mixed Gas Adsorption on an Activated Carbon Fiber

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Nobuyuki Tokunaga¹  Tomoshige Nitta¹  Takashi Katayama¹  Atsushi Yamaguchi¹ 

[1] Department of Chemical Engineering, Osaka University

关键词: Adsorption;    Isotherm Equation;    Patchwise Model;    Scaled-Particle Theory;    Mixed-Gas Adsorption;    Methane;    Ethane;    Ethylene;    Carbon Dioxide;   

DOI  :  10.1252/jcej.24.312

来源: Maruzen Company Ltd

【 摘 要 】

References(16)Cited-By(3)A practical isotherm equation based on the scaled-particle theory and a patchwise model has been developed for single- and multi-component adsorption on a heterogeneous surface. The surface energy distribution function used in the model is the asymmetric Gaussian function; however, the continuous distribution is formally changed to four discrete patches, called the four-point approximation model, by means of the Hermite-Gauss quadrature formula in the numerical integration. The model is applied to single-gas adsorption on an activated carbon fiber, KF-1500, at elevated pressures and three temperatures with satisfactory agreement. Four binary gas adsorption data on KF-1500 at 298.15 K and 500 kPa have been obtained and analyzed by the model. The geometric mean assumption for the binary interaction parameters between adsorbed molecules is adequate for binary mixtures of methane + ethane and methane + ethylene, while an adjustable parameter for the binary interactions, kij, is required for binary mixtures of carbon dioxide + ethane and carbon dioxide + ethylene.

【 授权许可】

Unknown