On the Product Formation in 1-Butene Metathesis over Supported Tungsten Catalysts
On the Product Formation in 1-Butene Metathesis over Supported Tungsten Catalysts
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DOI：
10.1007/s10562-010-0345-9
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发表时间：
2010-07-01
影响因子：
2.8
通讯作者：
van Steen, Eric
中科院分区：
文献类型：
--
作者：
Harmse, Liesel;van Schalkwyk, Charl;van Steen, Eric
在二氧化硅、二氧化硅-氧化铝和γ -al (2)O(3)负载的8wt %钨催化剂上进行了1-丁烯复分解。在应用的反应条件下，除预期的反应产物外，1-丁烯复分解还能产生选择性较大的异丁烯。对于活性较低的催化剂，异丁烯选择性高，随复分解活性的增加而降低。推测异丁烯的形成涉及到表面钨配合物，其形成抑制了复分解活性。
1-Butene metathesis was performed over 8 wt% tungsten catalysts supported on silica, silica-alumina and gamma-Al(2)O(3). Under the applied reaction conditions, 1-butene metathesis yields with a relatively large selectivity iso-butene in addition to the expected metathesis products. The isobutene selectivity is high for catalysts with a relative low activity and decreases with increasing metathesis activity. It is deduced that iso-butene formation involves surface tungsten complexes, whose formation inhibits the metathesis activity.