NOx Reduction Behavior of Alumina and Zeolite Catalysts in Combination with Non-Thermal Plasma.

Panov, A. G. ; Tonkyn, R. ; Yoon, S. ; Kolwaite, A. ; Barlow, S. ; Balmer, M. L.

Technical Information Center Oak Ridge Tennessee

关键词: Catalysts;    Non-thermal plasma;    Automobiles;    Catalysis;    Design;   

RP-ID  :  DE2004827866

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

Lean burn gasoline and diesel engines provide improved fuel economy when compared to engines operating under stoichiometric fuel/air conditions. At the same time, lean burn and diesel engines present a problem for emission control. Because they operate under oxidizing conditions, the conventional three-way catalyst is not effective in NOx reduction. In addition, the wide temperature range of automobile exhaust gases present a challenge for catalyst design. The temperature of exhaust gases from a light duty diesel engine can vary from 150 to 500 C, depending on the operating conditions. To date, a catalyst that operates with high NOx conversion efficiency over the entire operating range has not been found. Non-thermal plasma assisted catalysis has been shown to be a promising technology for NOx reduction in lean burn and diesel exhaust gases. The approach exploited in this paper is to use a plasma in combination with several catalysts, each of which are active over unique temperature ranges. It was reported in the literature, that the one of the essential roles of plasma treatment is to oxidize NO to easier reducible NO2. In this contribution, the other important function of plasma treatment, namely partial oxidation of propylene, will be demonstrated.