N2O decomposition in the presence of ammonia on faujasite-supported metal catalysts

被引:25
作者
Mauvezin, M
Delahay, G [1 ]
Coq, B
Kieger, S
机构
[1] CNRS, UMR 5618, Lab Mat Catalyt & Catalyse Chim Organ, Montpellier, France
[2] ENSCM, F-34296 Montpellier, France
[3] Grande Paroisse SA, F-76121 Le Grand Quevilly, France
关键词
nitrous oxide; ammonia; reduction; zeolite FAU;
D O I
10.1016/S0926-3373(99)00072-7
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 reduction of N2O to N-2 was carried out by temperature programmed surface reaction (TPSR) from 473 to 873 K in He, He + 3% O-2, He + 0.02% NH3 and He + 3% O-2 + 0.02% NH3 on H-FAU supported transition metal catalysts. In the absence of oxygen, the addition of NH3 considerably shifts the N2O conversion profile towards lower temperatures. This is particularly true for the Ru- and Rh-FAU which exhibit the onset of N2O conversion around 500 K. The addition of O-2 inhibits this effect for most of the catalysts and NO formation due to NH3 oxidation is observed. However Fe-, Ni- and Co-FAU kept the best catalytic behaviour for N2O reduction to N-2 in the presence of O-2, when NH3 was added to the feed with respect to the decomposition reaction. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:L79 / L82
页数:4
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