Extraordinarily High Activity in the Hydrodesulfurization of 4,6-Dimethyldibenzothiophene over Pd Supported on Mesoporous Zeolite Y

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• 作者：Wenqian Fu ; Lei Zhang ; Tiandi Tang ; Qingping Ke ; Shun Wang ; Jianbo Hu ; Guoyong Fang ; Jixue Li ; Feng-Shou Xiao
• 刊名：Journal of the American Chemical Society
• 出版年：2011
• 出版时间：October 5, 2011
• 年：2011
• 卷：133
• 期：39
• 页码：15346-15349
• 全文大小：778K
• 年卷期：v.133,no.39(October 5, 2011)
• ISSN：1520-5126

文摘

Design and preparation of highly active hydrodesulfurization (HDS) catalysts is very important for the removal of air pollution. Herein, we report an extraordinarily active HDS catalyst, which is synthesized by loading of Pd on mesoporous zeolite Y (Pd/HY-M). The mesoporous zeolite Y is successfully synthesized using a water glass containing N,N-dimethyl-N-octadecyl-N-(3-triethoxysilylpropyl) ammonium [(C₂H₅O)₃SiC₃H₆N(CH₃)₂C₁₈H₃₇]⁺ cation as a mesoscale template. Compared with mesoporous Beta and ZSM-5 supported Pd catalysts (80.0% and 73.4% for Pd/HBeta-M and Pd/HZSM-5-M, respectively) as well as commercial catalyst of 纬-Al₂O₃ supported Pd catalyst (31.4%), Pd/HY-M catalyst exhibited very high activity in HDS of 4,6-dimethyldibenzothiophene (4,6-DM-DBT, 97.3%). The higher activity of Pd/HY-M than that of Pd/HBeta-M and Pd/HZSM-5-M is assigned to the larger micropore size of zeolite Y compared to that of Beta and ZSM-5. Theoretical simulation and adsorption experimental data show that 4,6-DM-DBT has difficulty entering the micropores of ZSM-5 and Beta zeolites, but the micropores of Y zeolite are accessible.