CATALYST FOULING IN THE DEHYDROGENATION OF n-BUTANE OVER CHROMIA-ALUMINA CATALYSTS

TOEI RYOZO, NAKANISHI KAZUHIRO, YAMADA KAZUMASA, OKAZAKI MORIO

doi:10.1252/jcej.8.131

CATALYST FOULING IN THE DEHYDROGENATION OF n-BUTANE OVER CHROMIA-ALUMINA CATALYSTS

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TOEI RYOZO

Department of Chemical Engineering, Kyoto University
NAKANISHI KAZUHIRO

Department of Chemical Engineering, Kyoto University Address for correspondence: Department of Food Science and Technology Kyoto University
YAMADA KAZUMASA

Department of Chemical Engineering, Kyoto University Dainippon Ink and Chemicals Co., Ltd.
OKAZAKI MORIO

Department of Chemical Engineering, Kyoto University

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説明

The fouling mechanism of the dehydrogenation of n-butane over chromia-alumina catalysts was studied both theoretically and experimentally.<br> The reaction experiments were carried out using three kinds of chromia-alumina catalysts of different compositions and it was clarified that dehydrogenation of n-butane was effective only on chromia, whereas coke formation occurred on alumina as well as on chromia.<br> The experimental results could be well explained by the dual active site model in which two kinds of active sites on the catalytic surface and a one-to-one correspondence between the number of "molecules of coke" and the number of active sites were assumed.