Metathesis of C4 olefin over Mo-based heterogeneous catalysts: A novel route to propene and isopentene
Metathesis of C4 olefin over Mo-based heterogeneous catalysts: A novel route to propene and isopentene
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Mo基多相催化剂上C4烯烃的复分解：制备丙烯和异戊烯的新途径
DOI：
10.1016/j.apcata.2012.07.002
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发表时间：
2012-10
期刊：
影响因子：
--
通讯作者：
Longya Xu
中科院分区：
文献类型：
--
作者：
Dazhou Zhang;Xiujie Li;Shenglin Liu;Shengjun Huang;Xiangxue Zhu;Sujuan Xie;Longya Xu
提出了一种以1-丁烯和异丁烯连续复分解为基础的高产丙烯和异戊烯新路线。在固定床反应器上制备了γ- al2o3和hmo - al2o3复合材料负载的两种mo基催化剂，并对其性能进行了评价。实验结果表明，催化剂上发生了3个有趣的反应：1-C4=→2-C4=（异构化I）、2-C4=+1-C4=→C3=+2-C5=（异构化I）、2-C4=+ I - c4 =→C3=+ I - c5 =（异构化II）。异构化是接下来两个复分解反应的前提步骤。复分解I对酸度更敏感，只要催化剂的酸度足够，它就可以在低温下发生。结果表明，2-丁烯和异丁烯的甲基化反应对温度更敏感，较高的反应温度更适合甲基化反应。6Mo/ al2o3在1-丁烯和异丁烯的连续分解反应中表现出最好的催化性能。此外，通过对γ- al2o3载体进行蒸汽处理，可以大大提高异戊烯的选择性。氧化铝载体的修饰导致Mo物种的分布不同，在八面体状态下形成更多的Mo物种可能是复分解II优先活化的原因。
A novel route with high yields of propene and isopentene on the basis of consecutive metathesis of 1-butene and isobutene is proposed. Two series of Mo-based catalysts supported on γ-Al2O3and HMOR-Al2O3composite materials were prepared and evaluated in a fixed bed reactor. Experimental results revealed that three interesting reactions occurred on the catalysts, i.e. 1-C4=→2-C4=(Isomerization I), 2-C4=+1-C4=→C3=+2-C5=(Metathesis I), 2-C4=+i-C4=→C3=+i-C5=(Metathesis II). Isomerization I was the prerequisite step of the following two metathesis reactions. Metathesis I was more acidity-sensitive and it could happen at low temperatures provided that the catalyst acidity was sufficient. Metathesis II, as the targeted reaction, was proved to be more temperature-sensitive, and high reaction temperatures were preferable for the metathesis of 2-butene and isobutene. 6Mo/Al2O3exhibited the best catalytic metathesis performance among the candidate catalysts in the consecutive metathesis of 1-butene and isobutene. Furthermore, isopentene selectivity could be highly enhanced through the steam treatment of γ-Al2O3support. The modifications of alumina support led to the different distribution of Mo species and the formation of more Mo species in octahedral state may contribute to the preferential activation of Metathesis II.
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影响因子：
5.5
作者：
J. Handzlik;J. Ogonowski;J. Stoch;M. Mikołajczyk
通讯作者：
J. Handzlik;J. Ogonowski;J. Stoch;M. Mikołajczyk
影响因子：
3.7
作者：
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通讯作者：
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影响因子：
5.5
作者：
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通讯作者：
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DOI：
--
发表时间：
2003
期刊：
--
影响因子：
--
作者：
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通讯作者：
R. Thomas;E. M. V. Oers;V. H. J. D. Beer;J. Medema;J. A. Moulijn
影响因子：
5.3
作者：
Shenglin Liu;Shengjun Huang;Wenjie Xin;Bai Jie;Sujuan Xie;Longya Xu
通讯作者：
Shenglin Liu;Shengjun Huang;Wenjie Xin;Bai Jie;Sujuan Xie;Longya Xu