Hydrodesulfurization of__ dibenzothiophene catalyzed by Ni-Mo sulfides supported on a mixture of__ M.pdfVIP

Hydrodesulfurization of dibenzothiophene catalyzed by Ni-Mo sulfides supported on a mixture of MCM-41 and HY zeolite Jing Ren a, Anjie Wang a,b,*, Xiang Li a,b, Yongying Chen a,b, Haiou Liu a, Yongkang Hu b a State Key Laboratory of Fine Chemicals, Dalian University of Technology, 158 Zhongshan Road, Dalian 116012, PR China b Liaoning Key Laboratory of Petrochemical Technology and Equipments, Dalian University of Technology, Dalian 116012, PR China Applied Catalysis A: General 344 (2008) 175–182 A R T I C L E I N F O Article history: Received 9 November 2007 Received in revised form 8 April 2008 Accepted 14 April 2008 Available online 22 April 2008 Keywords: Hydrodesulfurization Mixed support MCM-41 HY zeolite Dibenzothiophene A B S T R A C T High-performance hydrodesulfurization (HDS) catalysts were prepared by supporting Ni-Mo sulfides on a mixture of mesoporous MCM-41 and microporous HY zeolite. The mixed support was obtained either by physically mixing [MCM-41-HY(M)] or by overgrowing MCM-41 over HY zeolite particles [MCM-41- HY(C)]. Their HDS activities were tested in a trickle bed reactor at 280–340 8C, total pressure 5.0 MPa, H2/ feed ratio 1200 Nm3 m3 and WHSV 27 h1, using a solution of 0.8 wt% DBT (dibenzothiophene) in decalin as the feed. A synergetic effect of the components in the mixed supports was observed on the supported Ni-Mo sulfides. NiMo/MCM-41-HY(M) exhibited both high HDS activity and hydrocracking activity, whereas NiMo/MCM-41-HY(C) showed a comparable HDS activity but a much lower hydrocracking activity. Moreover, the increase in HDS activity of either catalyst was accompanied by an enhancement in the hydrogenation pathway. The large difference betweenNiMo/MCM-41-HY(M) and NiMo/MCM-41-HY(C) in the hydrocracking activity may result from their different pore structures.  2008 Elsevier B.V. All rights reserved. Contents lists available at ScienceDirect Applied Catalysis A: General journal homepage: /locate/apcata1. Introduction The production