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题名: Tungsta promotion of selective catalytic reduction of NOx by NH3 over ceria-zirconia catalyst
作者: Li Ye1, 2;  Cheng Hao1;  Li Deyi1;  Qin Yongsheng1;  Wang Shudong1
关键词: tungsta ;  ceria ;  zirconia ;  nitrogen oxide ;  ammonia ;  selective catalytic reduction
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2008-06-01
卷: 29, 期:6, 页:547-552
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: CeO2-ZrO2 and 10%WO3/CeO2-ZrO2 catalysts were characterized by NH3 temperature-programmed desorption, H-2-temperature-programmed reduction, and X-ray photoelectron spectroscopy. Their activity in the selective catalytic reduction (SCR) of NO, with NH3 was compared. The results show that the promotion effect of WO3 may be related to the increase of acidity and redox properties of the catalyst. CeO2-ZrO2 shows less than 65% and 10% WO3/CeO2-ZrO2 shows more than 80% NOx conversion in the temperature range of 220-420 degrees C at NH3/NO=1 and space velocity of 90 000 h(-1). The addition of 10% H2O and 10%CO2 decreases the catalyst activity at low temperature by competitive adsorption on the catalyst surface and improves the NO, conversion at high temperature. The CeO2-ZrO2 catalyst shows less than 46% and the 10% WO3/CeO2-ZrO2 catalyst shows more than 80% NOx conversion in the temperature range of 230-500 degrees C.
关键词[WOS]: OXIDE CATALYSTS ;  DIESEL EXHAUST ;  NITRIC-OXIDE ;  AMMONIA ;  OXYGEN ;  MODEL
语种: 英语
WOS记录号: WOS:000257735100010
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141047
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Liaoning, Peoples R China
2.Chinese Acad Sci, Graduate Univ, Beijing 100049, Peoples R China

Recommended Citation:
Li Ye,Cheng Hao,Li Deyi,et al. Tungsta promotion of selective catalytic reduction of NOx by NH3 over ceria-zirconia catalyst[J]. CHINESE JOURNAL OF CATALYSIS,2008,29(6):547-552.
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