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KMID : 1059519910350030204
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Journal of the Korean Chemical Society
1991 Volume.35 No. 3 p.204 ~ p.210
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Adsorption of N2 and Ar Gases on the Non-porous Perovskite Surfaces
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Cho Hyun-Woo
Kim Jung-Soo
Lee Kwang-Soon
Ahn Woon-Sun
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Abstract
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Multilayer adsorption isotherms of nitrogen and argon on the perovskite-type mixed oxides, synthesized by a citrate coprecipitation method, are determined at the liquid nitrogen temperature using a gravimetric adsorption apparatus. The volume of the adsorbed gas are plotted against the statistical thickness of the adsorbed layer, calculated from several universal adsorption isotherms one after another. The t-method area obtained from this plot is compared with the BET area and finally the appropriateness of universal adsorption isotherms is then discussed on the basis of the plot
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