Combined plasma-catalytic processing of nitrous oxide

被引：61

作者：

Krawczyk, K ^{[1
]}

Mlotek, M ^{[1
]}

机构：

[1] Warsaw Univ Technol, Dept Chem, PL-00662 Warsaw, Poland

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2001年 / 30卷 / 3-4期

关键词：

gliding arc discharge; plasma; gas purification; heterogeneous catalysis; nitrous oxide; nitric oxide;

D O I：

10.1016/S0926-3373(00)00243-5

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 gliding are discharge, combined with a catalytic bed, has been applied for nitrous oxide processing in oxygen containing gases. It has been found that under conditions of the gliding are, nitrous oxide in mixtures with oxygen or air not only decomposes to oxygen and nitrogen, but is also oxidised to nitric oxide. The overall conversion of nitrous oxide, as well as the degree of N2O oxidation to NO were studied as a function of its initial concentration, flow rate, and discharge power. The overall N2O conversion and degree of oxidation to NO decreased with increasing flow rate and initial N2O concentration, and increased with increasing discharge power. The degree of N2O oxidation to NO varied within 20-37%. The overall conversion and degree of N2O oxidation increased when granular dielectric materials (TiO2, SiO2 (quartz glass), and gamma -Al2O3) were introduced into the reaction zone. The energy efficiency and the overall conversion of N2O were still further increased due to catalytic effects of a number of metal oxides (CuO, NiO, MnO2, Fe2O3, Co3O4, ZrO2) deposited on gamma -Al2O3. The activity of the oxide catalysts within the active power range of 300-360 W decreased in the order: CuO > Fe2O3 > NiO > MnO2 > Co3O4 > ZrO2. It has been concluded that the combined plasma-catalytic processing may be an efficient way for the reduction of N2O emissions. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：233 / 245

页数：13

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