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Modifying the acidity of H-MOR and its catalytic carbonylation of dimethyl ether

Chinese Journal of Catalysis 2016年第9期37卷 1530-1538页

作者： Meixia Wang Shouying Huang Jing Lü Zaizhe Cheng Ying Li Shengping Wang Xinbin Ma Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and Technology Tianjin UniversityCollaborative Innovation Center of Chemical Science and Engineering （Tianjin） Tianjin 300072 China

Among the reactions catalyzed by zeolites there are some that exhibit high selectivity due to the spatial confinement effect of the zeolite *** the acidity,particularly the distribution and location of the Bronsted acid sites in the zeolite is effective for making it a better catalyst for these *** prepared a series of H-mordenite（H-MOR） samples by varying the composition of the sol-gel,using different structure directing agents and ***3-TPD and IR characterization of adsorbed pyridine were employed to determine the amount of Bronsted acid sites in the 8-membered ring and 12-membered ring *** was shown that controlled synthesis was a promising approach to improve the concentration of Bronsted acid sites in MOR,even with a low Al *** an appropriate composition of Si and Al in the sol-gel favored a higher proportion of Bronsted acid sites in the 8-membered ring *** as a structure-direct agent gave an obvious enrichment of Bronsted acid sites in the 8-membered *** of dimethyl ether was used as a probe reaction to examine the modification of the acid properties,especially the Bronsted acid sites in the 8-membered ring *** was a linear relationship between methyl acetate formation and the number of Bronsted acid sites in the 8-membered ring channels,demonstrating the successful modification of acid *** results provide information for the rational design and modification of zeolites with spatial constraints.

关键词： Zeolite H-mordenite Modification of acidity Hydrothermal synthesis Structure-direct agent Post treatment carbonylation of dimethyl ether

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