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Hydrodesulfurization of dibenzothiophene over CoMo/HMS and CoMo/Ti-HMS catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
53184 46921 2006 9 PDF Available
Title
Hydrodesulfurization of dibenzothiophene over CoMo/HMS and CoMo/Ti-HMS catalysts
Abstract

Hexagonal mesoporous materials (HMS) with and without titanium were used as supports for preparation of CoMo HDS catalysts. The supports and the catalysts were characterized by adsorption–desorption of nitrogen, XRD, DRS UV–vis, TPR and DRIFTS in the OH region. The catalytic activity of the samples was evaluated in the reaction of hydrodesulfurization of dibenzothiophene. The activity of the CoMo/HMS and CoMo/Ti-HMS catalysts was compared to that of a conventional industrial CoMo/Al2O3 catalyst. The CoMo/Ti-HMS catalyst demonstrated to be more activate than Ti-free catalysts. The presence of Ti ions into the HMS framework impedes the formation of Co2SiO4 and of β-CoMoO4 inactive phases. It is suggested that the higher activity of the Ti-containing catalysts is related to the better dispersion of the supported CoMo phase, the higher concentration of octahedral Co2+ species, larger pore size diameter and lower reduction-sulfidation temperature of the supported species.

Keywords
HMS and Ti-HMS supports; CoMo catalyst; HDS of DBT; Support effect; Physical characterization
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Hydrodesulfurization of dibenzothiophene over CoMo/HMS and CoMo/Ti-HMS catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 7, Issue 1, January 2006, Pages 33–41
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
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