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	Promotional Mechanism of Sulfation on Selective Catalytic Reduction of NO by Methane in Excess Oxygen: A Comparative Study of Rh/Al2O3 and Rh/Al2O3/SO42-
	Xu, Shicheng ; Li, Junhua ; Yang, Dong ; Hao, Jiming
	2010-05-10 ; 2010-05-10
关键词	FOURIER-TRANSFORM IR ALUMINA-SUPPORTED RH IN-SITU DRIFT NITRIC-OXIDE TUNGSTATED ZIRCONIA ZEOLITE CATALYSTS RHODIUM CATALYSTS DENO(X) CATALYST CARBON-MONOXIDE NITROGEN-OXIDES Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary
中文摘要	The catalytic performance and reaction mechanism for selective catalytic reduction of NOx by methane in excess oxygen over Rh-loaded sulfated alumina were investigated. Sulfation was observed to influence the properties of catalysts in two aspects: (i) modify the dispersion and electronic state of surface rhodium species and (ii) deten-nine the surface NOy groups. Differences in Surface nitrates and their behaviors lead to different mechanisms for CH4-SCR of NO. On Rh/Al2O3, the adsorbed monodentate nitrates (1558 cm(-1)) could react with methane in the absence of oxygen, while remaining almost inert to the mixture of methane and an excess amount of oxygen. However, nitrates on Rh/Al2O3/SO42-, most probably bidentate nitrates (1600-1598 cm(-1)), were able to react with methane in the presence of oxygen. Moreover, a proportional relationship between NO conversion rates and intensities of nitrosyl (1936 cm(-1)) bands was found on Rh/Al2O3/SO42- and the rate-determining step of NO conversion was probably the reduction of nitrosyl.
语种	英语 ; 英语
出版者	AMER CHEMICAL SOC ; WASHINGTON ; 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/23349]
专题	清华大学
推荐引用方式 GB/T 7714	Xu, Shicheng,Li, Junhua,Yang, Dong,et al. Promotional Mechanism of Sulfation on Selective Catalytic Reduction of NO by Methane in Excess Oxygen: A Comparative Study of Rh/Al2O3 and Rh/Al2O3/SO42-[J],2010, 2010.
APA	Xu, Shicheng,Li, Junhua,Yang, Dong,&Hao, Jiming.(2010).Promotional Mechanism of Sulfation on Selective Catalytic Reduction of NO by Methane in Excess Oxygen: A Comparative Study of Rh/Al2O3 and Rh/Al2O3/SO42-..
MLA	Xu, Shicheng,et al."Promotional Mechanism of Sulfation on Selective Catalytic Reduction of NO by Methane in Excess Oxygen: A Comparative Study of Rh/Al2O3 and Rh/Al2O3/SO42-".(2010).

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