Steam effects over Pd/Ce0.67Zr0.33O2-Al2O3 three-way catalyst

Ceria-zirconia-alumina （CZA） solid solution was prepared by sol-gel method in the present study. 0.5 wt.% Pd supported on CZA was prepared by incipient wetness impregnation. The steam effects for CO and C3H8 oxidation, three-way catalytic activity and stoichiometric window property were studied. The...

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Bibliographic Details
Published inJournal of rare earths Vol. 30; no. 8; pp. 748 - 752
Main Author 王建强 沈美庆 王军 高继东 马杰 刘双喜
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.08.2012
Subjects
Carbon monoxide
Catalysts
Oxidation
Palladium
Pd/Ce0.67Zr0.33O2-Al2O3
Rare earth metals
rare earths
Solid solutions
steam reforming
stoichiometric window
Streams
three-way catalytic activity
water-gas shift
Wetness
三效催化剂
催化活性
化学计量
氧化反应
氧化铈
水煤气变换
水蒸气重整
蒸汽
three-way catalytic activity
water-gas shift
Pd/Ce0.67Zr0.33O2-Al2O3
steam reforming
stoichiometric window
rare earths
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ISSN1002-0721
2509-4963
DOI10.1016/S1002-0721(12)60123-9

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Summary:Ceria-zirconia-alumina （CZA） solid solution was prepared by sol-gel method in the present study. 0.5 wt.% Pd supported on CZA was prepared by incipient wetness impregnation. The steam effects for CO and C3H8 oxidation, three-way catalytic activity and stoichiometric window property were studied. The light-off temperature of the CO oxidation reaction shifted to a lower temperature due to the water-gas shift （WGS） reactions. The oxidation of C3H8 was enhanced due to the steam reforming （SR） reactions. The steam promoted the C3H8 oxidation and NO reduction in three-way catalytic reaction. The amplitude of stoichiometric window was amplified by the addition of water to the feed stream.
Bibliography:11-2788/TF
Ceria-zirconia-alumina （CZA） solid solution was prepared by sol-gel method in the present study. 0.5 wt.% Pd supported on CZA was prepared by incipient wetness impregnation. The steam effects for CO and C3H8 oxidation, three-way catalytic activity and stoichiometric window property were studied. The light-off temperature of the CO oxidation reaction shifted to a lower temperature due to the water-gas shift （WGS） reactions. The oxidation of C3H8 was enhanced due to the steam reforming （SR） reactions. The steam promoted the C3H8 oxidation and NO reduction in three-way catalytic reaction. The amplitude of stoichiometric window was amplified by the addition of water to the feed stream.
Pd/Ce0.67Zr0.33O2-Al2O3; three-way catalytic activity; water-gas shift; steam reforming; stoichiometric window; rare earths
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ISSN:1002-0721
2509-4963
DOI:10.1016/S1002-0721(12)60123-9