Intimate contact of enolic species with silver sites benefits the SCR of NOx by ethanol over Ag/Al2O3

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	Intimate contact of enolic species with silver sites benefits the SCR of NOx by ethanol over Ag/Al2O3
	Yan, Yong ; Yu, Yunbo ; He, Hong ; Zhao, Jiaojiao
刊名	Chemistry; Engineering
	2012
卷号	293 期号:1 页码:13-26
关键词	Selective catalytic reduction of NOx Enolic species Ag/Al2O3 Acetate Isocyanate
ISSN号	0021-9517
中文摘要	Alumina-supported silver (Ag/Al2O3) catalysts with different silver loadings were investigated for the selective catalytic reduction of NOx by ethanol. The catalytic role of silver in the formation of enolic species was studied by ultraviolet-visible spectroscopy, diffuse reflectance infrared Fourier transform spectroscopy combined with mass spectrometry, density functional theory calculations, and kinetic measurements. It was found that the enolic species originating from the partial oxidation of ethanol over Ag/Al2O3 prefer to adsorb on or close to silver sites, in intimate contact with the active phase. This adsorption behavior of this enolic species contributes to its high activity for the formation of isocyanate species (-NCO) and the final product N-2 during the NOx reduction by ethanol over Ag/Al2O3. Surface acetate also formed during this process, while only interacting with Al sites, resulting in a lower activity for -NCO formation. Meanwhile, the mechanism of the NOx reduction by ethanol was discussed. (C) 2012 Elsevier Inc. All rights reserved.
WOS记录号	WOS:000308836800002
公开日期	2014-11-26
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/8017]
专题	生态环境研究中心_大气环境科学实验室
推荐引用方式 GB/T 7714	Yan, Yong,Yu, Yunbo,He, Hong,et al. Intimate contact of enolic species with silver sites benefits the SCR of NOx by ethanol over Ag/Al2O3[J]. Chemistry; Engineering,2012,293(1):13-26.
APA	Yan, Yong,Yu, Yunbo,He, Hong,&Zhao, Jiaojiao.(2012).Intimate contact of enolic species with silver sites benefits the SCR of NOx by ethanol over Ag/Al2O3.Chemistry; Engineering,293(1),13-26.
MLA	Yan, Yong,et al."Intimate contact of enolic species with silver sites benefits the SCR of NOx by ethanol over Ag/Al2O3".Chemistry; Engineering 293.1(2012):13-26.