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题名: NO reduction by CH4 in the presence of excess O-2 over Mn/sulfated zirconia catalysts
作者: Ning, L;  Wang, AQ;  Wang, XD;  Zheng, MY;  Cheng, RH;  Zhang, T
关键词: NO reduction ;  methane ;  sulfated zirconia ;  tolerance ;  water and SO2
刊名: APPLIED CATALYSIS B-ENVIRONMENTAL
发表日期: 2004-04-08
DOI: 10.1016/j.apcatb.2003.11.002
卷: 48, 期:4, 页:259-265
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Engineering, Environmental ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: Selective catalytic reduction (SCR) of NO with methane in the presence of excess oxygen has been investigated over a series of Mn-loaded sulfated zirconia (SZ) catalysts. It was found that the Mn/SZ with a metal loading of 2-3 wt.% exhibited high activity for the NO reduction, and the maximum NO conversion over the Mn/SZ catalyst was higher than that over Mn/HZSM-5. NH3-TPD results of the catalysts showed that the sulfation process of the supports resulted in the generation of strong acid sites, which is essential for the SCR of NO with methane. On the other hand, the N-2 adsorption and the H-2-TPR of the catalysts demonstrated that the presence of the SO42- species promoted the dispersion of the metal species and made the Mn species less reducible. Such an increased dispersion of metal species suppressed the combustion reaction of CH4 by O-2 and increased the selectivity towards NO. The Mn/SZ catalysts prepared by different methods exhibited similar activities in the SCR of NO with methane, indicating the importance of SO42-. The most attractive feature of the Mn/SZ catalysts was that they were more tolerant to water and SO2 poisoning than Mn/HZSM-5 catalysts and exhibited higher reversibility after removal of SO2. (C) 2003 Elsevier B.V. All rights reserved.
关键词[WOS]: SELECTIVE REDUCTION ;  NITROGEN-OXIDES ;  NITRIC-OXIDE ;  MICROWAVE-DISCHARGE ;  ENHANCED ACTIVITY ;  WATER-VAPOR ;  METHANE ;  OXYGEN ;  SCR ;  HYDROCARBONS
语种: 英语
WOS记录号: WOS:000220640800004
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139591
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, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Ning, L,Wang, AQ,Wang, XD,et al. NO reduction by CH4 in the presence of excess O-2 over Mn/sulfated zirconia catalysts[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2004,48(4):259-265.
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