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Copper and nickel catalysts supported on praseodymium-doped ceria (PDC) for the water-gas shift reaction

Paper ID Volume ID Publish Year Pages File Format Full-Text
40212 45846 2013 6 PDF Available
Title
Copper and nickel catalysts supported on praseodymium-doped ceria (PDC) for the water-gas shift reaction
Abstract

•Doping ceria catalyst support with 5 wt% of Pr increased the reducibilty of sample.•The OSC and catalytic results in WGS reaction showed the same trend for CePr supports.•Ni catalysts showed higher activity (due to WGS and methanation) than Cu ones.•Cu in bimetallic catalysts lowered the reduction temperature of nickel (II).•Cu-Ni catalysts presented a good selectivity towards WGS.

The aim of this work is to study the behavior of Cu and Ni catalysts supported on praseodymium-doped ceria (PDC) for the WGS reaction. Samples were prepared by impregnation of several PDC supports (praseodymium content in the range 0–50 wt%) synthesized by the urea thermal decomposition method. Bare support and catalysts were characterized by BET, XRD, oxygen storage capacity and TPR. The activity tests were carried out in an atmospheric fixed bed reactor, using a CO/H2O/H2/N2 mixture as the feed stream. Doping of ceria with small loading of Pr increases the surface reducibility and the oxygen storage capacity of ceria. Nickel catalysts are more active than copper ones. In both cases, catalysts supported on PDC with 5 Pr wt% are more active than samples supported on pure ceria. Methanation, which is likely to occur on Ni catalysts, is moderated in samples supported on praseodymium-doped ceria.

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Keywords
CO removal; Hydrogen; Ceria support; Praseodymium; Cu-Ni catalysts
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Copper and nickel catalysts supported on praseodymium-doped ceria (PDC) for the water-gas shift reaction
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 460–461, 10 June 2013, Pages 15–20
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