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Phosphorus effect on Co//Mo and Ni//Mo synergism in hydrodesulphurization catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
42864 45944 2009 5 PDF Available
Title
Phosphorus effect on Co//Mo and Ni//Mo synergism in hydrodesulphurization catalysts
Abstract

The influence of P concentration on the synergism between Co/γ-Al2O3 or Ni/γ-Al2O3 and Mo/γ-Al2O3 stacked beds separated by a 3-mm stack of Px/γ-Al2O3 is studied in the hydrodesulphurization of gasoil under operating conditions similar to those of industry. The results shown increased Co//Mo and Ni//Mo synergism related to changes in zero point of charge (ZPC), acid strength, and band intensities of diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy due to the incorporation of P into the γ-Al2O3 used as separator.

Graphical abstractIn the conventional hydrodesulphurization (HDS) catalysts type Co(or Ni)Mo/γ-Al2O3, including commercial catalysts, the effect of phosphorus on HDS activity can be well explained by an increase of synergism (Fso) Co//Mo and Ni//Mo caused by the increased mobility of spillover hydrogen on the OH phosphorus surface structure separating the crystallites CoSx or NiSx and MoS2 sulphides.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Hydrodesulphurization; Phosphorus; Hydrogen spillover; Synergism CoMo and NiMo
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Phosphorus effect on Co//Mo and Ni//Mo synergism in hydrodesulphurization catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 364, Issues 1–2, 31 July 2009, Pages 75–79
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
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