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NO reduction by CH4 in the presence of excess O-2 over Mn/sulfated zirconia catalysts
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
2004-04-08
DOI10.1016/j.apcatb.2003.11.002
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
关键词[WOS]SELECTIVE REDUCTION ; NITROGEN-OXIDES ; NITRIC-OXIDE ; MICROWAVE-DISCHARGE ; ENHANCED ACTIVITY ; WATER-VAPOR ; METHANE ; OXYGEN ; SCR ; HYDROCARBONS
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.
语种英语
WOS记录号WOS:000220640800004
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被引频次:7[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/139591
专题中国科学院大连化学物理研究所
作者单位Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
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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.
APA Ning, L,Wang, AQ,Wang, XD,Zheng, MY,Cheng, RH,&Zhang, T.(2004).NO reduction by CH4 in the presence of excess O-2 over Mn/sulfated zirconia catalysts.APPLIED CATALYSIS B-ENVIRONMENTAL,48(4),259-265.
MLA Ning, L,et al."NO reduction by CH4 in the presence of excess O-2 over Mn/sulfated zirconia catalysts".APPLIED CATALYSIS B-ENVIRONMENTAL 48.4(2004):259-265.
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