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Catalytic performance of novel Sn(x)Zr(1-x)O(2) solid solution catalysts for NO selective reduction by propene under lean-burn conditions
Wei, JY; Zhu, YX; Xie, YC
2002-11-01
Source PublicationACTA CHIMICA SINICA
ISSN0567-7351
Volume60Issue:11Pages:1929-1935
AbstractA series of Sn(x)Zr(1=x)O(2) solid solution catalysts was prepared by co-current coprecipitation method using ammonia solution as precipitation agent and calcined at 500 degreesC for 4 It in air. Among them, the sample containing SnO(2) [w (SnO(2)) = 60%] showed the highest NO conversion of 71% at 350 degreesC, with 1.212 x 10(-3) NO, 1.095 x 10(-3) C(3)H(6) and 2.09% O(2) in He at a space velocity of 17000 h(-1). In comparison, the sample SZ160E2 comprising SnO(2) [w (SnO(2)) = 60%] was prepared by urea-based homogeneous precipitation method, which showed a higher NO conversion of 74% at 350 degreesC. Furthermore, the catalytic performance of SZ160E2 was examined thoroughly with different concentration of oxygen and propene, or at different temperature and space velocity, and the performance under steam was studied as well. The results illuminated that Sn(x)Zr(1-x)O(2) solid solution catalysts could sustain moderate activity after calcined at a temperature above 800 degreesC, at a high space velocity of 50000 h(-1), in the presence of excess O(2) content of 8.0% (lean-burn condition) or after steam treatment for 12 h. The best C(3)H(6)/NO molar ratio for SZ160E2 was from 1.24 to 1.65 and in this region about 80% NO could be reduced to the harmless N(2) at 350 degreesC. It was shown that Sn(x)Zr(1-x)O(2) solid solution catalysts had good thermal stability and hydrothermal stability, and could be used under lean-burn conditions and a high space velocity. According to the conversion of C(3)H(6) to CO(2) in NO-SCR reaction, we conclude that the combustion activity of propene was restrained and the activity for NO reduction was enhanced at the same time due to the insertion of zirconium ions into the crystal lattice of tin dioxide.
KeywordNo Selective Catalytic Reduction (No-scr) Sn(x)Zr(1-x)o(2) Solid Solution Catalyst Lean-burn
Indexed BySCI
Language英语
WOS IDWOS:000179416400005
PublisherSCIENCE CHINA PRESS
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/79428
Collection中国科学院化学研究所
Corresponding AuthorWei, JY
AffiliationPeking Univ, State Key Lab Struct Chem Unstable & Stable Speci, Coll Chem & Mol Engn, Beijing 100871, Peoples R China
Recommended Citation
GB/T 7714
Wei, JY,Zhu, YX,Xie, YC. Catalytic performance of novel Sn(x)Zr(1-x)O(2) solid solution catalysts for NO selective reduction by propene under lean-burn conditions[J]. ACTA CHIMICA SINICA,2002,60(11):1929-1935.
APA Wei, JY,Zhu, YX,&Xie, YC.(2002).Catalytic performance of novel Sn(x)Zr(1-x)O(2) solid solution catalysts for NO selective reduction by propene under lean-burn conditions.ACTA CHIMICA SINICA,60(11),1929-1935.
MLA Wei, JY,et al."Catalytic performance of novel Sn(x)Zr(1-x)O(2) solid solution catalysts for NO selective reduction by propene under lean-burn conditions".ACTA CHIMICA SINICA 60.11(2002):1929-1935.
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