Sorption of Benzene in CoAlPO4-5 Molecular Sieves |
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Authors: | J.X. Liu M. Dong Z.L. Sun Z.F. Qin J.G. Wang |
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Affiliation: | (1) State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, P.O. Box 165, Taiyuan, 030001, P.R. China;(2) Liaoning University of Petroleum & Chemical Technology, Fushun, 113001, P.R. China |
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Abstract: | The sorption isotherms of benzene in CoAlPO4-5 at temperatures of 323–399 K were measured by the gravimetric technique. The sorption capacity and isosteric heat were estimated and interpreted on the basis of the pore topologies of the molecular sieves. The isotherms followed the typical Type-I shape, and could be well fitted with Langmuir and Dubinin-Radushkevich equations. The initial heats of sorption at zero coverage could be well explained by the surface curvature model. The isosteric heats of sorption varied with the coverage, which may suggest a shift of molecular packing manner in the sorbed phase. |
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Keywords: | sorption CoAlPO4-5 benzene sorption isotherms heat of sorption |
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