Role of cyanide species in the reduction of NO by CH4 over Co-ZSM-5

被引：94

作者：

Lobree, LJ ^{[1
]}

Aylor, AW ^{[1
]}

Reimer, JA ^{[1
]}

Bell, AT ^{[1
]}

机构：

[1] UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720

来源：

JOURNAL OF CATALYSIS | 1997年 / 169卷 / 01期

关键词：

D O I：

10.1006/jcat.1997.1699

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：

In situ infrared observation during the reduction of NO by CH4 over Co-ZSM-5 reveals the presence of CN species. The reactivity of these species has been probed by exposing them to NO2, O-2, or NO while monitoring their rate of disappearance. In a complementary set of experiments, mass spectrometry was used to identify the reaction products as N-2 and CO2. At 450 degrees C the rate coefficients for the consumption of CN are 8.5 x 10(-5), 1.9 x 10(-6), and 3.3 x 10(-7) s(-1) ppm(-1) for reaction in NO2, O-2, and NO, respectively. The reactivity of CN is sufficiently high for these species to be considered reaction intermediates in the formation of N-2 and CO2 during the reduction of NO by CH4 in the presence of O-2. (C) 1997 Academic Press.

引用

页码：188 / 193

页数：6

共 16 条

[1] Mechanistic cause of hydrocarbon specificity over Cu/ZSM-5 and Co/ZSM-5 catalysts in the selective catalytic reduction of NOx [J].