Gas phase propylene epoxidation over Au supported on titanosilicates with different Ti chemical environments
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- 作者：Xuan-Ye Chena ; Shi-Long Chenb ; Ai-Pin Jiab ; Ji-Qing Lua ; jiqinglu@zjnu.cn" class="auth_mail" title="E-mail the corresponding author ; Wei-Xin Huangb ; huangwx@ustc.edu.cn" class="auth_mail" title="E-mail the corresponding author
- 关键词：Propylene epoxidation ; Au catalysts ; Defective Ti sites ; Porous structure ; Kinetics
- 刊名：Applied Surface Science
- 出版年：2017
- 出版时间：30 January 2017
- 年：2017
- 卷：393
- 期：Complete
- 页码：11-22
- 全文大小：2289 K
文摘
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Au on a Ti-MCM-41 with hybrid meso/micropores had the highest propylene conversion.
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Kinetic results suggested competitive adsorption of propylene and PO on Ti sites.
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Defective Ti sites and mesopores in the support improved intrinsic activity.
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Mesopores resulted in fast desorption of propylene and oxidation of PO to CO2.
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Micropores stabilized adsorbed propylene and resulted in higher PO selectivity.