Effects of Acetic Acid on Product Selectivity in Gas Phase Oxidative Dehydrogenation of Cyclohexane

Chem. J. Chinese Universities

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Effects of Acetic Acid on Product Selectivity in Gas Phase Oxidative Dehydrogenation of Cyclohexane

ZHU Yu-Jun^1,2, LI Jing¹, YANG Xiang-Guang^1*, WU Yue¹

1. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;
2. College of Chemistry and Chemical Engineering, Heilongjiang University, Harbin 150080, China

Received:2005-05-17 Revised:1900-01-01 Online:2006-06-10 Published:2006-06-10
Contact: YANG Xiang-Guang

Abstract

Abstract: The effect of adding acetic acid on the product distribution in gas phase oxidative dehydrogenation of cyclohexane over α₁-VOPO₄ catalyst was investigated. The role of acetic acid in the reaction process was put forward. The proposed mechanism is that acetic acid take precedence of cyclohexane adsorbing on the active sites of α₁-VOPO₄ catalyst to form isolated active site. Thus, cyclohexene species can desorb quickly from the active sites, avoiding its deep oxidation dehydrogenation. Almost 100% selectivity to cyclohexene could be obtained when the molar ratio of acetic acid to cyclohexane was 12.9∶1 at 450 ℃, the conversion of cyclohexane was 6.9%.

Key words: α₁-VOPO₄ catalyst, Cyclohexane, Cyclohexene, Acetic acid, Gas phase oxidative dehydrogenation

CLC Number:

O643

TrendMD:

ZHU Yu-Jun^1,2, LI Jing¹, YANG Xiang-Guang^1*, WU Yue¹. Effects of Acetic Acid on Product Selectivity in Gas Phase Oxidative Dehydrogenation of Cyclohexane[J]. Chem. J. Chinese Universities, doi: .

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Effects of Acetic Acid on Product Selectivity in Gas Phase Oxidative Dehydrogenation of Cyclohexane

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