ICCAS OpenIR
Effect of doped metal oxides on performance of SnxZr1-xO2 solid solution catalysts for NO selective reduction
Wei, JY; Zhu, YX; Duan, LY; Xie, YC
2003-06-01
Source PublicationCHINESE JOURNAL OF CATALYSIS
ISSN0253-9837
Volume24Issue:6Pages:414-418
AbstractSeveral doped Sn0.55Zr0.45O2 Solid solution catalysts were prepared by impregnation of Sn-Zr hydrous oxide with aqueous solution of respective metal salts and their catalytic properties for the selective reduction of NO under lean-burn conditions were investigated. Among the samples tested, Sn0.55Zr0.45O2 doped with Y, La, Ba, or Zn by impregnation followed by calcination at 500 degreesC, and the mechanical mixture of Sn0.55Zr0.45O2 and alpha-Mn2O3 showed better activity than Sn0.55Zr0.45O2 for NO selective reduction under lean-burn conditions. Ga-doped Sn0.55Zr0.45O2 having strong B acid sites on the surface and the catalysts doped with transition metal elements such as Ce, Ag, Cu, Mn, and Ni showed poor catalytic performance. Further experiments found that Sn-Zr hydrous oxide prepared by homogeneous precipitation is a better precursor than that prepared by co-current precipitation. The best loading for each dopant is 6% Y, 3% La, 2% Ba, 1% Zn and 8% Mn2O3 respectively. Among these catalysts, 2% Ba-doped Sn0.55Zr0.45O2 showed the highest NO conversion with dry gas feed, and 1% Zn-doped Sn0.55Zr0.45O2 had the best NO reduction activity with steam. Studies on the reaction process of propene oxidation with O-2 indicated that the combustion of propene was restrained over the SnxZr1-xO2 solid solution catalysts doped with Y, La, Ba and Zn. Meanwhile, the oxidation of NO to NO2 can be enhanced over the Y- and La-doped samples or the mixture with alpha-Mn2O3. The suppressing of propene complete combustion and the enhancement of NO oxidation to NO2 may be beneficial to NO selective reduction.
KeywordNitric Oxide Selective Catalytic Reduction Tin Oxide Zirconia Solid Solution Metal Oxide Doping
Indexed BySCI
Language英语
WOS IDWOS:000184218500005
PublisherSCIENCE CHINA PRESS
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/79634
Collection中国科学院化学研究所
Corresponding AuthorXie, YC
AffiliationPeking Univ, Coll Chem & Mol Engn, State Key Lab Struct Chem Unstable & Stable Speci, Beijing 100871, Peoples R China
Recommended Citation
GB/T 7714
Wei, JY,Zhu, YX,Duan, LY,et al. Effect of doped metal oxides on performance of SnxZr1-xO2 solid solution catalysts for NO selective reduction[J]. CHINESE JOURNAL OF CATALYSIS,2003,24(6):414-418.
APA Wei, JY,Zhu, YX,Duan, LY,&Xie, YC.(2003).Effect of doped metal oxides on performance of SnxZr1-xO2 solid solution catalysts for NO selective reduction.CHINESE JOURNAL OF CATALYSIS,24(6),414-418.
MLA Wei, JY,et al."Effect of doped metal oxides on performance of SnxZr1-xO2 solid solution catalysts for NO selective reduction".CHINESE JOURNAL OF CATALYSIS 24.6(2003):414-418.
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