HDS of dibenzothiophenes and hydrogenation of tetralin over a SiO2 supported Ni-Mo-S catalyst  

作　　者：Qiang Wei Jinwen Chen Chaojie Song Guangchun Li 

机构地区：[1]Natural Resources Canada, CanmetENERGY-Devon, One Oil Patch Drive, Devon, AB, T9G 1A8, Canada [2]Energy, Mining & Environment, National Research Council Canada, 4250 westbrook Mall, Vancouver, BC, V6J 1W5, Canada

出　　处：《Frontiers of Chemical Science and Engineering》2015年第3期336-348,共13页化学科学与工程前沿（英文版）

摘　　要：A one-step synthesized Ni-Mo-S catalyst supported on SiO2 was prepared and used for hydrodesulphurization （HDS） of dibenzothiophene （DBT）, and 4,6-dimethyl-dibenzothiophene （4,6-DMDBT）, and for hydrogenation of tetralin. The catalyst showed relatively high HDS activity with complete conversion of DBT and 4,6-DMDBT at temperature of 280℃ and a constant pressure of 435 psi. The HDS conversions of DBT and 4,6- DMDBT increased with increasing temperature and pressure, and decreasing liquid hourly space velocity （LHSV）. The HDS of DBT proceeded mostly through the direct desulphurization （DDS） pathway whereas that of 4,6-DMDBT occurred mainly through the hydrogenation- desulphurization （HYD） pathway. Although the catalyst showed up to 24% hydrogenation/dehydrogenation con- version oftetralin, it had low conversion and selectivity for ring opening and contraction due to the competitive adsorption of DBT and 4,6-DMDBT and insufficient acidic sites on the catalyst surface.A one-step synthesized Ni-Mo-S catalyst supported on SiO2 was prepared and used for hydrodesulphurization （HDS） of dibenzothiophene （DBT）, and 4,6-dimethyl-dibenzothiophene （4,6-DMDBT）, and for hydrogenation of tetralin. The catalyst showed relatively high HDS activity with complete conversion of DBT and 4,6-DMDBT at temperature of 280℃ and a constant pressure of 435 psi. The HDS conversions of DBT and 4,6- DMDBT increased with increasing temperature and pressure, and decreasing liquid hourly space velocity （LHSV）. The HDS of DBT proceeded mostly through the direct desulphurization （DDS） pathway whereas that of 4,6-DMDBT occurred mainly through the hydrogenation- desulphurization （HYD） pathway. Although the catalyst showed up to 24% hydrogenation/dehydrogenation con- version oftetralin, it had low conversion and selectivity for ring opening and contraction due to the competitive adsorption of DBT and 4,6-DMDBT and insufficient acidic sites on the catalyst surface.

关 键 词：hydrodesulphurization （HDS） HYDROGENATION dibenzothiophene （DBT） 4 6-dimethyldibenzothiophene （4 6-DMDBT） TETRALIN 

分 类 号：O643.36[理学—物理化学] TE624.1[理学—化学]