Relationship Between the Adsorption Capacity of Hydrogen Isotopes and Specific Surface Area of Adsorbents

Chem. J. Chinese Universities

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Relationship Between the Adsorption Capacity of Hydrogen Isotopes and Specific Surface Area of Adsorbents

CHU Xiao-Zhong*, XU Ji-Ming

Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials, Department of Chemistry, Huaiyin Teachers College, Huaian 223300, China

Received:2007-10-08 Revised:1900-01-01 Online:2008-04-10 Published:2008-04-10
Contact: CHU Xiao-Zhong

Abstract

Abstract: The equilibrium adsorption capacity of hydrogen and deuterium on different micro- and mesoporous molecular sieve adsorbents and the specific surface area were measured at 77 K with a volumetric method. The results indicate that a good linear relationship was observed between the adsorption capacity of hydrogen isotopes and the specific surface area for the same kind of adsorbents, which provided a convincing proof of the monolayer adsorption mechanism for hydrogen isotopes at supercritical temperature. The adsorption capacity on microporous molecular sieves was larger than that on mesoporous molecular sieves at the same temperature, pressure and specific surface area, which was attributed to the overlapping of adsorption potential in micropores of adsorbents. An adsorption potential model was proposed that could be used to explain this experimental results well.

Key words: Hydrogen isotope, Molecular sieve, Adsorption potential, Model

CLC Number:

O647.3

TrendMD:

CHU Xiao-Zhong*, XU Ji-Ming. Relationship Between the Adsorption Capacity of Hydrogen Isotopes and Specific Surface Area of Adsorbents[J]. Chem. J. Chinese Universities, doi: .

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Relationship Between the Adsorption Capacity of Hydrogen Isotopes and Specific Surface Area of Adsorbents

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