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KMID : 0383619830040000009
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Bulletin of Environmental Sciences
1983 Volume.4 No. 0 p.9 ~ p.19
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Adsorption of the lower Hydrocarbons on Zeolite HL and Molecular Sieve Carbon 5A
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Ha Baik-Hoyn
Choi Kyung-Il
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Abstract
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The Dubinin-Astarkhov´s equation, the Cohen-Kisarov´s equation, and the modified Cohen-Kisarov´s adsorption isotherm equation by Ha, that were based on the potential theory of adsorption and interpreted as the volume filling adsorption model rather than the surface layer adsorption one, were applied on the adsorption systems, such as CH₄-HL, ??-HL, n-??-HL, ??-MSC-5A, C₂H₄-MSC-5A, which have micropores structure. From these equations, differential and intergral heats and entropies were calculated and compared with the measured values determined from the Clausius-Clapeyron equation.
It leads to the conclusion that, for the adsorption systems in which the Dubinin-Astarkhov equation and the Cohen-Kisarov equation were not well fitted with the measured values, the modified form of Cohen-Kisarov´s equation by Ha was fitted well with the measured ones in isotherms and heats of adsorption. But, in the adsorption of the slightly longer chain hydrocarbon such as n-butane on HL which has a linear type pore structure, the modified Cohen-Kisarov´s equation was not fitted. However, it could be interpreted by the Dubinin-Astarkhov´s equation two types of heterogeous adsorption distribution in pores, using.
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