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KMID : 1059519840280010062
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Journal of the Korean Chemical Society
1984 Volume.28 No. 1 p.62 ~ p.69
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Shape Selective Catalysis of Cation-Exchanged Pentasil Zeolites
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Ahn Byeung-Joon
Hwang Byung-Woo
Chon Hak-Ze
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Abstract
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The reaction of toluene with ethanol was studied over various cation-exchanged pentasil zeolite catalysts. The toluene disproportionation reaction to produce xylenes increased with increasing reaction temperature and the activity of alkylation of toluene with ethanol showed maximum at around 400℃. Only Cs-ZSM-5 catalyst showed pronounced p-ethyltoluene selectivity increasing to 96% with increasing degree of Cs-exchange. The sorption rate of m-xylene was lower for Cs-exchanged ZSM-5 than H-ZSM-5 catalyst. These phenomena were interpreted in terms of shape selectivity arising from the partial blocking of channel intersections by large cesium ions.
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