Ethylbenzene Dehydrogenation in the Presence of CO2 over MCF-Supported Vanadium Oxide Catalysts

被引：17

作者：

Li Chunguang ^{[1
]}

Miao Changxi ^{[2
]}

Nie Yingying ^{[1
]}

Yue Yinghong ^{[1
]}

Gu Songyuan ^{[2
]}

Yang Weimin ^{[2
]}

Hua Weiming ^{[1
]}

Gao Zi ^{[1
]}

机构：

[1] Fudan Univ, Dept Chem, Shanghai Key Lab Mol Catalysis & Innovat Mat, Shanghai 200433, Peoples R China

[2] SINOPEC, Shanghai Res Inst Petrochem Technol, Shanghai 201208, Peoples R China

来源：

CHINESE JOURNAL OF CATALYSIS | 2010年 / 31卷 / 08期

基金：

中国国家自然科学基金;

关键词：

vanadia; mesocellular silica foam; supported catalyst; ethylbenzene dehydrogenation; styrene; carbon dioxide; CARBON-DIOXIDE; OXIDATIVE DEHYDROGENATION; SILICA FOAMS; STYRENE; PERFORMANCE;

D O I：

10.1016/S1872-2067(10)60099-X

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A series of vanadia catalysts supported on mesocellular silica foam (MCF) with a V content ranging from 2% to 10% were studied with respect to their performance in the dehydrogenation of ethylbenzene (EB) to styrene in the presence of CO2 The structural and textural characterization of these catalysts was done using N-2 adsorption, X-ray diffraction, and temperature-programmed reduction These catalysts were found to be effective for the dehydrogenation reaction and the 6%V/MCF catalyst showed the highest activity The MCF-supported vanadia catalysts exhibited far higher activity than their conventional V/MCM-41 counterparts, which can be attributed to the higher reducibility and better diffusion of reactants and products in the former catalysts A higher conversion was obtained during EB dehydrogenation with CO2 than with N-2 This is due to the oxidative dehydrogenation of EB with the help of oxygen that originates from CO2 as well as the coupling of EB simple dehydrogenation with the reverse water-gas shift reaction

引用

页码：993 / 998

页数：6

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