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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
关键词Adsorption No-o-2 Co-adsorption In Situ Ft-ir Nitrates Deno(x) Ch4 Scr Pd
刊名APPLIED CATALYSIS B-ENVIRONMENTAL
2011-11-02
DOI10.1016/j.apcatb.2011.08.040
110页:171-177
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]PROMOTED TUNGSTATED ZIRCONIA ; SULFATED ZIRCONIA ; NITRIC-OXIDE ; EXCESS O-2 ; WATER-VAPOR ; SPECTROSCOPIC CHARACTERIZATION ; PALLADIUM CATALYSTS ; SURFACE-REACTION ; CARBON-MONOXIDE ; NITROGEN-OXIDES
英文摘要In 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.
语种英语
WOS记录号WOS:000297093500021
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被引频次:5[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/321008/142609
专题中国科学院大连化学物理研究所
作者单位1.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
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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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