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혼합산화물 촉매에 의한 무수말레인산의 합성(I) - V-Mo-P 촉매에 의한 시클로펜타디엔의 기상 산화반응 -
Synthesis of Maleic Anhydride over Mixed Oxide Catalyst(I);-Catalytic Oxidation of Cyclopentadiene over V-Mo-P Catalyst-
HWAHAK KONGHAK, April 1988, 26(2), 149-157(9), NONE
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Abstract
조성 및 담체를 달리한 V-Mo-P 혼합산화물 촉매상에서 시클로펜타디엔의 기상 산화반응에 의한 무수말레인산의 합성반응을 연구하였다. 몰리브덴이나 인의 함유량이 증가하면 촉매의 산성도, 환원도 및 바나디움이온의 평균 산화수는 증가하였다. 담체로써 α-알루미나를 사용하는 경우 티타니아 담체촉매보다 산성도 및 환원도가 더 컸다. 시클로펜타디엔의 전화율은 촉매의 산성도와, 무수말레인산의 선택률은 바나디움의 평균 산화수와 각각 상관관계를 보였는데 수소환원성이 큰 촉매에서 V4+=0의 흡수밴드는 관찰되지 않고 또 선택률도 낮았다.
The vapor phase catalytic oxidation of cyclopentadiene to maleic anhydride was studied over V-Mo-P mixed oxide catalysts with different compositions of catalysts and different supports.
The acidity, reducibility and average oxidation number of vanadium increases with an increase in the molybdenium and phosphorus content. The acidity and reducibility of α-Alumina supported catalyst are higher than for titania supported catalyst. The conversion of cyclopentadiene and the selectivity of maleic anhydride are related to the acidity and oxidation number of vanadium, respectively. The absorption band of V4+ = 0 at 980 ㎝-1 is not observed in higher reducible catalysts and the selectivity of maleic anhydride is low in these catalysts.
The acidity, reducibility and average oxidation number of vanadium increases with an increase in the molybdenium and phosphorus content. The acidity and reducibility of α-Alumina supported catalyst are higher than for titania supported catalyst. The conversion of cyclopentadiene and the selectivity of maleic anhydride are related to the acidity and oxidation number of vanadium, respectively. The absorption band of V4+ = 0 at 980 ㎝-1 is not observed in higher reducible catalysts and the selectivity of maleic anhydride is low in these catalysts.
