Plasma-assisted catalytic reduction of NO x
Plasma-assisted catalytic reduction of NO x
复制标题
等离子体辅助催化还原 NO x
DOI：
10.21236/ada379892
复制
发表时间：
1998
期刊：
影响因子：
--
通讯作者：
C. Wan
中科院分区：
文献类型：
--
作者：
K. Voss;R. Brusasco;H. Kung;M. Kung;B. Merritt;B. Penetrante;W. Pitz;G. Vogtlin;C. Wan
Many studies suggest that lean-NO x SCR proceeds via oxidation of NO to NO¬ by oxygen, followed by the reaction of the NO¬ with hydrocarbons. On catalysts that are not very effective in catalyzing the equilibration of NO+O¬ and NO¬, the rate of N¬ formation is substantially higher when the input NO x is NO¬ instead of NO. The apparent bifunctional mechanism in the SCR of NO x has prompted the use of mechanically mixed catalyst components, in which one component is used to accelerate the oxidation of NO to NO¬, and another component catalyzes the reaction between NO¬ and the hydrocarbon. Catalysts that previously were regarded as inactive for NO x reduction could therefore become efficient when mixed with an oxidation catalyst. Preconverting NO to NO¬ opens the opportunity for a wider range of SCR catalysts and perhaps improves the durability of these catalysts. This paper describes the use of a non-thermal plasma as an efficient means for selective partial oxidation of NO to NO¬. When combined with some types of SCR catalyst, the plasma can greatly enhance the NO x reduction and eliminate some of the deficiencies encountered in an entirely catalyst-based approach. efficiency for reduction of NO x
