Oxidation Activity and Acidity of V<SUB>2</SUB>O<SUB>5</SUB>–P<SUB>2</SUB>O<SUB>5</SUB> Catalyst
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概要
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The oxidations of 1-butene, butadiene, and hydrogen in a large excess of air were carried out over various V–P oxide catalysts with different P<SUB>2</SUB>O<SUB>5</SUB> contents. The oxidation activities were compared with the dehydration activity for isopropyl alcohol, which was used as a measure of the acidity of the catalysts. The surface area and the acidity per unit of surface area sharply decrease with an increase in the P<SUB>2</SUB>O<SUB>5</SUB> content up to about 20 mol% P<SUB>2</SUB>O<SUB>5</SUB>, while with a further increase in the P<SUB>2</SUB>O<SUB>5</SUB> they remain almost unchanged. The activity per unit of surface area for the oxidation of butene and butadiene, as well as that for the isomerization of butene, changes in the same direction as the acidity per unit of surface area. The equilibrium constant for the adsorption of olefin changes analogously. The activity per unit of surface area for the oxidation of hydrogen is not affected by the P<SUB>2</SUB>O<SUB>5</SUB> content. The effects of the P<SUB>2</SUB>O<SUB>5</SUB> introduced into V<SUB>2</SUB>O<SUB>5</SUB> on the activity and selectivity are discussed from the viewpoint of the acidic nature of the catalysts.
- 公益社団法人 日本化学会の論文
著者
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Ai Mamoru
Research Laboratory Of Resources Utilization Tokyo Institute Of Technology
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Suzuki Sadao
Research Laboratory of Resources Utilization, Tokyo Institute of Technology
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