Molybdenum oxide catalysts for metathesis of higher 1-alkenes via supporting MoO₂(acetylacetonate)₂ and MoO₂(glycolate)₂ on SBA-15 mesoporous molecular siev

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• 作者：Hynek Balcar ; Diwa Mishra ; Eric Marceau ; Xavier Carrier ; Nadě ; ž ; da Ž ; ilková ; Zdeně ; k Bastl
• 关键词：1-Alkene metathesis ; Mo heterogeneous catalysts ; Molybdenum dioxide bis(acetylacetonate) ; Molybdenum dioxide bis(glycolate) ; Mesoporous molecular sieves
• 刊名：Applied Catalysis A: General
• 出版年：2009
• 出版时间：15 May 2009
• 年：2009
• 卷：359
• 期：1-2
• 页码：129-135
• 全文大小：504 K

文摘

New heterogeneous catalysts for alkene metathesis were prepared by immobilization of molybdenum dioxide bis(acetylacetonate) and molybdenum dioxide bis(glycolate) on mesoporous molecular sieve SBA-15. Thermal spreading (TS) method and wet impregnation (WI) followed by calcinations were employed as synthesis approaches. These new catalysts represent inexpensive, easy-to-prepare and highly active and selective heterogeneous catalysts for metathesis of higher linear 1-alkenes applicable under mild reaction conditions without the necessity of solvent or co-catalyst in the reaction mixture. In metathesis of 1-octene, these catalysts showed up to four times higher activity compared with MoO₃ supported on conventional silica as well as on SBA-15. This is probably due to the better dispersion of the molybdenum oxide phase on the mesoporous support surface. In metathesis of 1-dodecene and 1-tetradecene these catalysts based on SBA-15 exhibited a significantly higher activity than corresponding catalysts on MCM-41, probably due to the larger pores.