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Effects of Ir content on selective hydrogenation of crotonaldehyde over Ir/ZrO2 catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
50666 46808 2012 4 PDF Available
Title
Effects of Ir content on selective hydrogenation of crotonaldehyde over Ir/ZrO2 catalysts
Abstract

A series of Ir/ZrO2 catalysts with different Ir contents were tested for gas phase selective hydrogenation of crotonaldehyde. It was found that the reactivity of the catalyst increased with increasing Ir content, but rapid deactivation was observed on all the catalysts during the reaction, which might be due to CO poisoning generated by decarbonylation reaction. The highest selectivity (82.2%) to crotyl alcohol was obtained over a catalyst with 3% Ir content, which was attributed to the proper Ir particle size and the highest amount of surface acid sites in the catalyst.

Graphical abstractThe carbonyl oxygen of crotonaldehyde is suggested to strongly interact with Lewis acid sites (σ2) and the Ir particle is the adsorption center of CC band (π) and carbonyl carbon (σ1).Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Ir/ZrO2 catalysts were used for selective hydrogenation of crotonaldehyde. ► 3% Ir catalyst has the highest selectivity (82.2%) to crotyl alcohol. ► The deactivation is due to CO molecules produced during the reaction.

Keywords
Ir/ZrO2 catalyst; Crotonaldehyde hydrogenation; Crotyl alcohol; Lewis acid sites
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Effects of Ir content on selective hydrogenation of crotonaldehyde over Ir/ZrO2 catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 21, 5 May 2012, Pages 5–8
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