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Advantage of Ni/SBA-15 catalyst over Ni/MgO catalyst in terms of catalyst stability due to release of water during nitrobenzene hydrogenation to aniline

Paper ID Volume ID Publish Year Pages File Format Full-Text
50087 46779 2012 4 PDF Available
Title
Advantage of Ni/SBA-15 catalyst over Ni/MgO catalyst in terms of catalyst stability due to release of water during nitrobenzene hydrogenation to aniline
Abstract

Two catalysts, Ni/SBA-15 and Ni/MgO were prepared by wet impregnation technique with 5 wt.% Ni loading in each catalyst. These were tested for nitrobenzene hydrogenation to aniline reaction under vapor phase at atmospheric pressure. Ni/MgO suffered a huge loss in the activity (conversion) during time on stream study even though the Ni dispersion is larger compared to that in SBA-15 supported catalyst. TPR studies of used catalysts confirm coking of the catalysts. The superior catalytic activity in terms of conversion and selectivity during time on stream operation exhibited by Ni/SBA-15 catalyst is due to the hydrophobic nature of this catalyst (resistant to water generated during the reaction) and the effect of coking is not significant.

Graphical abstractHydrophobic nature of SBA-15 makes Ni/SBA-15 an ideal catalyst for nitrobenzene hydrogenation to aniline.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► The hydrophobic nature of SBA-15 makes Ni/SBA-15 a robust catalyst. ► Deactivation of Ni/MgO is due to adsorption of water generated during the reaction. ► The role of carbon deposition during the reaction is insignificant on the activity. ► Strong interaction between Ni and MgO favors higher Ni dispersion.

Keywords
Ni/SBA-15 catalyst; Ni/MgO catalyst; Nitrobenzene hydrogenation; Aniline; Hydrophobic nature
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Advantage of Ni/SBA-15 catalyst over Ni/MgO catalyst in terms of catalyst stability due to release of water during nitrobenzene hydrogenation to aniline
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 18, 10 February 2012, Pages 89–92
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