Influence of support and kind of VOx species on isobutene selectivity and coke deposition in non-oxidative dehydrogenation of isobutane
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- 作者：Uwe Rodemerck ; uwe.rodemerck@catalysis.de" class="auth_mail" title="E-mail the corresponding author ; Sergey Sokolov ; Mariana Stoyanova ; Ursula Bentrup ; David Linke ; Evgenii V. Kondratenko ; evgenii.kondratenko@catalysis.de" class="auth_mail" title="E-mail the corresponding author
- 关键词：Isobutane dehydrogenation ; Supported vanadia catalysts ; Surface acidity ; Isomerization ; Deactivation ; Coke formation
- 刊名：Journal of Catalysis
- 出版年：2016
- 出版时间：June 2016
- 年：2016
- 卷：338
- 期：Complete
- 页码：174-183
- 全文大小：1041 K
文摘
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VOx on SiO2, Al2O3, and SiO2-Al2O3 were tested in dehydrogenation of isobutane.
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VOx on Al2O3 showed much higher selectivity than VOx on SiO2 or SiO2–Al2O3.
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Selectivity is determined by activity for isobutene isomerization to n-butenes.
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Isomerization is catalyzed by acidic sites of support and by VOx bound to silica.
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Coke can be formed via isobutene or via n-butene–butadiene.