Organo-NOx formation-decomposition as the origin of the changes in the low temperature NO-TPD profile in the presence of n-decane on Ag/γ-Al2O3

被引：3
作者：
Malinger, Kinga [1 ,2 ]
Blanchard, Juliette [1 ,2 ]
Doherty, Rachel P. [1 ,2 ]
Thomas, Cyril [1 ,2 ]
机构：
[1] UPMC, UMR 7197, Lab Reactivite Surface, F-75005 Paris, France
[2] CNRS, UMR 7197, Lab Reactivite Surface, F-75005 Paris, France
来源：
CATALYSIS COMMUNICATIONS | 2014年 / 46卷
关键词：
Lean deNO(x); Selective catalytic reduction; n-C-10-SCR; Catalysts; NOx-TPD; SELECTIVE CATALYTIC-REDUCTION; SUPPORTED SILVER CATALYSTS; ALUMINA CATALYSTS; LEAN REDUCTION; NITRIC-OXIDE; PROPENE; SCR; AG; HYDROCARBONS; AL2O3;
D O I：
10.1016/j.catcom.2013.11.017
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The NOx desorption profiles obtained in O-2-He and n-C-10-O-2-He were compared on gamma-Al2O3 and Ag/gamma-Al2O3. On Ag/gamma-Al2O3, the low-temperature NOx desorption profiles obtained in n-C-10-O-2-He were significantly different from those obtained in O-2-He. In particular, at 190-220 degrees C excess release of NO, instead of NO2, was observed concomitantly with n-C-10 consumption. This is interpreted as the result of the formation-decomposition of organo-NOx species issued from the interaction of NO2 and hydrocarbons initially chemisorbed on Al2O3 and activated on Ag species, respectively. The occurrence of such a phenomenon at temperatures close to those at which the n-C-10-SCR reaction starts provides support for the involvement of the organo-NOx species as intermediates. (C) 2013 Elsevier By. All rights reserved.
引用
收藏
页码：81 / 85
页数：5
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