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Effect of TiO2 on the hydrodesulfurization performance of bulk Ni2P

Paper ID Volume ID Publish Year Pages File Format Full-Text
41156 45879 2012 7 PDF Available
Title
Effect of TiO2 on the hydrodesulfurization performance of bulk Ni2P
Abstract

The bulk Ni2P and TiO2-doped bulk Ni2P (Ti–Ni2P(x), x represents the Ti/Ni atomic ratio) were prepared by a co-precipitation method followed by an in-situ H2 temperature-programmed reduction procedure. The passivated catalysts were characterized by N2 adsorption–desorption method and X-ray absorption spectroscopy (XAS). Their hydrodesulfurization (HDS) performances were studied using dibenzothiophene (DBT) as the model molecule. The XAS results indicated that Ti–Ni2P(0.01) and Ti–Ni2P(0.03) were more oxidized than the other samples during passivation. The EXAFS analysis showed that Ni was formed in the presence of TiO2. The coordination number of NiNi shell of Ni in Ti–Ni2P(x) reached its maximum at a Ti/Ni atomic ratio = 0.05. The HDS activity of Ni2P was substantially improved by the introduction of TiO2. TiO2 had different promoting effects on the direct desulfurization pathway and the hydrogenation pathway activities of Ni2P. The promoting effect of TiO2 is discussed by considering the electronic interactions between surface TiO2 and Ni2P species and the variations in the active site distributions.

Graphical abstract.Figure optionsDownload full-size imageDownload high-quality image (113 K)Download as PowerPoint slideHighlights► Preparation of TiO2-doped bulk Ni2P hydrodesulfurization catalysts. ► The catalytic activity of Ni2P was substantially improved by the addition of TiO2. ► The oxidability of Ni2P was affected by TiO2. ► Ni was formed in the presence of TiO2.

Keywords
Nickel phosphide; TiO2; Hydrodesulfurization; Dibenzothiophene; Promoting
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Effect of TiO2 on the hydrodesulfurization performance of bulk Ni2P
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 417–418, 29 February 2012, Pages 19–25
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
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