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The Effect of Heating In Vacuo on the Microporosity of Sepiolite

Published online by Cambridge University Press:  01 July 2024

A. J. Dandy  and
M. S. Nadiye-Tabbiruka
A. J. Dandy
Affiliation:
School of Natural Resources, University of the South Pacific, Suva, Fiji
M. S. Nadiye-Tabbiruka
Affiliation:
Department of Chemistry, Makerere University, Kampala, Uganda
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Abstract

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The t-plot method has been applied to the results of nitrogen adsorption at 76°K on sepiolite first heated in vacuo at various temperatures. Heating sepiolite samples in vacuo at 427°K results in a large decrease in surface area compared with samples outgassed at 373°K. A change in structure and a consequent collapse of micropores is postulated. However, the t-plots indicate that some microporosity remains. Outgassing at 623°K appears to destroy completely the micropores.

Type
Research Article
Information
Clays and Clay Minerals , Volume 23 , Issue 6 , December 1975 , pp. 428 - 430
Copyright
Copyright © 1975, The Clay Minerals Society

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