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Influence of the activation atmosphere on the hydrodesulfurization of Co-Mo/SBA-15 catalysts prepared from sulfur-containing precursors

Paper ID Volume ID Publish Year Pages File Format Full-Text
41031 45875 2012 7 PDF Available
Title
Influence of the activation atmosphere on the hydrodesulfurization of Co-Mo/SBA-15 catalysts prepared from sulfur-containing precursors
Abstract

Mesoporous SBA-15 material was used as support of binary Co-Mo hydrodesulfurization (HDS) catalysts prepared using a novel approach based on the use of already sulfided precursors (ammonium tetrathiomolybdate and cobalt diethyldithiocarbamate). The effects of atmosphere and activation temperature were studied to optimize the preparation of highly active CoMo/SBA-15 hydrodesulfurization catalysts. Two sets of catalysts were synthesized using either a N2/H2 (10% H2) or a H2/H2S (15% H2S) atmosphere at three different temperatures of activation (723, 773 and 823 K). The catalysts were tested in the HDS of dibenzothiophene (DBT) and the catalysts were characterized by N2 physisorption, X-ray diffraction (XRD), scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM). The use of already sulfided precursors leads to a homogeneous dispersion of the active phase inside the SBA-15 channels. Moreover, the N2/H2 activation procedure at 723 K allows obtaining optimized HDS active catalysts. Finally, a confinement effect of MoS2 slabs inside the SBA-15 channels leads to a high selectivity along the direct desulfurization pathway.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (192 K)Download as PowerPoint slideHighlights► Mesoporous SBA-15 material support of binary Co-Mo hydrodesulfurization catalysts. ► The effects of atmosphere and activation temperature for active CoMo/SBA-15 catalysts. ► Confinement effect of MoS2 slabs inside the SBA-15 channels.

Keywords
Hydrodesulfurization; SBA-15; Activation; ATM; Dithiocarbamate; Confinement effect
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Influence of the activation atmosphere on the hydrodesulfurization of Co-Mo/SBA-15 catalysts prepared from sulfur-containing precursors
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 419–420, 29 March 2012, Pages 95–101
Authors
, , , , , , , , , ,
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