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Thermodynamics and Kinetics Study of the Adsorption and Diffusion of p-Xylene in Silicalite-1
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Xiuhong Meng
Published/Copyright:
April 6, 2009
Abstract
Gravimetric equilibrium isotherms, thermodynamic parameters, and diffusion of p-xylene in silicalite-1 were investigated at several temperatures using an intelligent gravimetric analyzer (IGA). Both plateau and hysteresis loops appeared in the isotherms obtained at 323 and 343 K, respectively. Heat of sorption (Qst), free energy change (ΔG), entropy change (ΔS), and entropy (Sa) of the adsorbed phase at various sorption coverages were determined from the adsorption isotherms. The diffusion coefficients at different loadings were also calculated using Fick's equation. The calculated thermodynamic and kinetic parameters satisfactorily explain the adsorption process and isotherm features.
Received: 2008-02-23
Accepted: 2008-06-12
Published Online: 2009-04-06
Published in Print: 2009-March
© 2009 Walter de Gruyter · Berlin · New York
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- Thermodynamics and Kinetics Study of the Adsorption and Diffusion of p-Xylene in Silicalite-1
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Articles in the same Issue
- An Outlook on Biothermodynamics. II. Adsorption of Proteins
- Thermodynamics and Kinetics Study of the Adsorption and Diffusion of p-Xylene in Silicalite-1
- Constitutive Equations for Internal Variables Thermodynamics of Suspensions
- Influence of Molecular Parameters on the Thermodiffusion and Thermal Conductivity in Binary Mixtures of Diatomic Fluids using NEMD
- Contact Quantities and Non-Equilibrium Entropy of Discrete Systems
- “Non-Equilibrium Thermodynamics of Heterogeneous Systems” by Signe Kjelstrup and Dick Bedeaux
