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Characterization of Zeolites by Gas Adsorption at Low Pressures

Published online by Cambridge University Press:  28 February 2011

Agustin F. Venero  and
J. N. Chiou
Agustin F. Venero
Affiliation:
Omicron Technology Corp., 160 Sherman Avenue, Berkeley Heights, N.J. 07922
J. N. Chiou
Affiliation:
Omicron Technology Corp., 160 Sherman Avenue, Berkeley Heights, N.J. 07922
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Abstract

The nitrogen and argon adsorption isotherms of three different zeolites, calcium A, ZSM-5, and sodium Y were obtained at 77.3 and 87.5 K. Using a continuous volumetric technique high resolution data was obtained in the Henry's Law region of the isotherm at relative pressures below 10−1 P/Po. The data for the two adsorbates indicates that nitrogen, due to its quadrupole moment, shows a high degree of localized adsorption, which makes it difficult to differentiate among zeolites of different pore sizes. Argon, on the other hand, can be used to identify zeolites of different pore sizes. The argon data was used in conjunction with the Horvath-Kawazoe model to obtain a pore size distribution of the zeolite.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 111: Symposium O – Microstructure and Properties of Catalysts , 1987 , 235
Copyright
Copyright © Materials Research Society 1988

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