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Effect of H2S on selective hydrogenation of diolefins using NiPdCe(x)/Si-Al-coated structured packing catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
40652 45861 2012 10 PDF Available
Title
Effect of H2S on selective hydrogenation of diolefins using NiPdCe(x)/Si-Al-coated structured packing catalyst
Abstract

The effect of Ce and H2S on selective hydrogenation of diolefins using NiPdCe(x)/Si-Al-coated structured packing catalyst was studied for the selective hydrogenation of butadiene in the presence of benzene. The structured packing was coated by a silico-aluminate in which Ce, Ni and Pd were incorporated during successive impregnations. The catalyst was activated in the presence of hydrogen containing 10 ppm of hydrogen sulfide and tested in a continuous stirred tank reactor (CSTR) under different operating conditions. The catalysts were characterized by XRD, 27Al- and 29Si-NMR, TPR(H2), IR, XPS, physical and chemical analysis. The results indicated that Ce and hydrogen sulfide affect the metal dispersion, the electronic configurations of the metals on surface and the acidity of the catalyst. Therefore the activity and selectivity is modified by both Ce and H2S at constant Ni and Pd contents. The results were interpreted using a previously developed kinetics model.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (265 K)Download as PowerPoint slideHighlights► Dienes are selectively hydrogenated in presence of benzene olefins and sulfur. ► Use of stainless steel structured packing coated by a silico-aluminate. ► Ce is added to the coating to provide thioresistance. ► Pd and Ni build the hydrogenation active phase in the mesoporous coating. ► Stable operation during the hydrogenation of steam cracking C4 feed.

Keywords
Catalytic packing; NiPdCe(x)/SiAl catalyst; Butadiene selective hydrogenation
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Effect of H2S on selective hydrogenation of diolefins using NiPdCe(x)/Si-Al-coated structured packing catalyst
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 439–440, 10 October 2012, Pages 125–134
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