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인이 담지된 HZSM-5 촉매에 의한 메탄올 전화반응에서 올레핀의 선택성

Olefin Selectivity in the Conversion of Methanol over Phosphorus Modified HZSM-5 Catalysts

HWAHAK KONGHAK, December 1988, 26(6), 591-598(8), NONE
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Abstract

인의 담지량을 달리하여 제조한 HZSM-5 촉매에서 메탄올의 전화반응을 조사하였다. 5 wt%의 인을 담지시켜도 전화율에는 별 변화가 없었으나, 생성물중 올레핀의 함량은 현저히 증가되었다. 프로필렌의 선택도는 인의 담지량에 따라 증가되었으나, 에틸렌의 선택도는 인의 담지량이 많아지면 도리어 감소되었다. 프로필렌의 선택도 증가는 인의 담지에 따른 강한 산점의 감소와 올레핀간의 재평형 반응의 억제로 설명되었다.
The conversion reaction of methanol over modified HZSM-5 catalysts having different amount of phosphorus was studied. Formation of olefins was largely enhanced over 5 wt% phosphorus modified catalyst, although the decrease in conversion of methanol was not significant. The selectivity to propylene was increasing with the amount of impregnated phosphorus, while the selectivity to ethylene was decreasing. The increase in the selectivity to propylene could be explained by decrease of strong acid sites and suppression of reequilibration reaction of olefins due to phosphorus modification.

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