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Hydrodesulfurization of dibenzothiophene catalyzed by Ni-Mo sulfides supported on a mixture of MCM-41 and HY zeolite

Paper ID Volume ID Publish Year Pages File Format Full-Text
43114 45955 2008 8 PDF Available
Title
Hydrodesulfurization of dibenzothiophene catalyzed by Ni-Mo sulfides supported on a mixture of MCM-41 and HY zeolite
Abstract

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 °C, total pressure 5.0 MPa, H2/feed ratio 1200 Nm3 m−3 and WHSV 27 h−1, 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 between NiMo/MCM-41-HY(M) and NiMo/MCM-41-HY(C) in the hydrocracking activity may result from their different pore structures.

Graphical abstractA combination of microporous HY and mesoporous MCM-41, physically mixed or MCM-41 overgrown over HY crystals, was used to support Ni-Mo sulfides, which exhibited substantially higher performance in the hydrodesulfurization (HDS) of dibenzothiophene (DBT) than the HY or MCM-41-supported counterparts.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Hydrodesulfurization; Mixed support; MCM-41; HY zeolite; Dibenzothiophene
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Hydrodesulfurization of dibenzothiophene catalyzed by Ni-Mo sulfides supported on a mixture of MCM-41 and HY zeolite
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 344, Issues 1–2, 15 July 2008, Pages 175–182
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us