Optimization for catalytic performances of Hβ zeolite in the acylation of 2-methylfuran by surface modification and solvents effect

详细信息    查看全文

• 作者：Yuannan Xiong ; Wenqi Chen ; Aiwu Zeng
• 关键词：Acylation ; Hβ zeolite ; Surface modification ; Catalytic performances ; Solvents effect
• 刊名：Research on Chemical Intermediates
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：43
• 期：3
• 页码：1557-1574
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Catalysis; Physical Chemistry; Inorganic Chemistry;
• 出版者：Springer Netherlands
• ISSN：1568-5675
• 卷排序：43

文摘

The liquid phase acylation of 2-methylfuran with acetic anhydride over modified Hβ zeolite was first conducted in a continuous flow reactor. The deactivation of Hβ zeolites was attributed to strong adsorption of reactants or products and was verified by GC–MS and 13C MAS NMR. Deactivated zeolites can be regenerated to their original state by calcination. The acidic properties was adjusted by surface modification on Hβ, the maximum yield of 89.5 mol% and selectivity of 100 % were obtained over tartaric acid modified by Hβ. The deposition of tetraethoxysilane to silica on Hβ contributed to enhancing the catalytic stability. Combined with the results of NH₃-TPD and Py-FTIR, the amount of Broensted acids played a major role on catalytic activity. A close relationship between the catalytic stability and the ratio of the amount of strong to weak acids at 1:1 was highlighted here. The solvents' effect on the catalytic performances was examined, and 1,2-dichloroethane with moderate polarity exerted a positive effect on catalytic stability.