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In situ FT-IR investigation on the selective catalytic reduction of NO with CH4 over Pd/sulfated alumina catalyst
Zhang, Hongyan1,2; Li, Lin1; Li, Ning1; Wang, Aiqin1; Wang, Xiaodong1; Zhang, Tao1
KeywordAdsorption No-o-2 Co-adsorption In Situ Ft-ir Nitrates Deno(x) Ch4 Scr Pd
Source PublicationAPPLIED CATALYSIS B-ENVIRONMENTAL
2011-11-02
DOI10.1016/j.apcatb.2011.08.040
Volume110Pages:171-177
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Physical ; Engineering, Environmental ; Engineering, Chemical
WOS Research AreaChemistry ; Engineering
WOS KeywordPROMOTED TUNGSTATED ZIRCONIA ; SULFATED ZIRCONIA ; NITRIC-OXIDE ; EXCESS O-2 ; WATER-VAPOR ; SPECTROSCOPIC CHARACTERIZATION ; PALLADIUM CATALYSTS ; SURFACE-REACTION ; CARBON-MONOXIDE ; NITROGEN-OXIDES
AbstractIn situ Fourier Transform Infrared (FT-IR) spectroscopy was applied to study the mechanism of the selective catalytic reduction (SCR) of NO with methane over 0.1 wt% Pd/sulfated alumina (SA) catalyst. Here, CO adsorption, NO adsorption, NO-O-2 co-adsorption and interaction of the intermediates after NO-O-2 adsorption with methane or methane/oxygen were investigated. The FT-IR results show that the Pd supported on Al2O3 mainly exists as oxide, such as PdO cluster. While, the Pd supported on SA mainly exists as isolated Pd2+ ions. The addition of Pd can promote the formation of nitro/nitrito and nitrate species on Al2O3 or SA at room temperature. At the same time, Pd also promotes the nitrates decomposition at high temperatures. Support sulfation further decreases the total concentration of the nitrates adsorbed on the surface of catalysts and lowers their thermal stability. Moreover, support sulfation can also stabilize isolated Pd2+ ions, which could catalyze the reaction between nitrate species and methane. Upon co-adsorption of NO and O-2 on 0.1 wt% Pd/SA catalyst, the intermediate Pd2+-NO was produced. This intermediate could readily react with CH4 and O-2, but almost not react with CH4 over 350 degrees C. (C) 2011 Elsevier B.V. All rights reserved.
Language英语
WOS IDWOS:000297093500021
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/142609
Collection中国科学院大连化学物理研究所
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Hongyan,Li, Lin,Li, Ning,et al. In situ FT-IR investigation on the selective catalytic reduction of NO with CH4 over Pd/sulfated alumina catalyst[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2011,110:171-177.
APA Zhang, Hongyan,Li, Lin,Li, Ning,Wang, Aiqin,Wang, Xiaodong,&Zhang, Tao.(2011).In situ FT-IR investigation on the selective catalytic reduction of NO with CH4 over Pd/sulfated alumina catalyst.APPLIED CATALYSIS B-ENVIRONMENTAL,110,171-177.
MLA Zhang, Hongyan,et al."In situ FT-IR investigation on the selective catalytic reduction of NO with CH4 over Pd/sulfated alumina catalyst".APPLIED CATALYSIS B-ENVIRONMENTAL 110(2011):171-177.
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