New Cordierite Diesel Particulate Filters for Catalyzed and Non-Catalyzed Applications.

Merkel, G. A. ; Cutler, W. A. ; Tao, T.

Technical Information Center Oak Ridge Tennessee

关键词: Diesel engines;    Filters;    Particulates;    Catalysts;    Performance;   

RP-ID  :  DE2004829860

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

Cordierite diesel particulate filters provide an economical approach to diesel emissions control. However, further reduction in the pressure drop of catalyzed and non-catalyzed cordierite filters is desirable. In order to derive a fundamental understanding of the relationship between clean and sootloaded pressure drop and the pore microstructure of the ceramic, and to optimize the microstructure for filter performance, cordierite filters have been fabricated spanning an extended range in porosity, pore size distribution, and pore connectivity. Analysis of the results has been applied to the development of several new cordierite diesel particulate filters that possess a unique combination of high filtration efficiency, high strength, and very low clean and soot-loaded pressure drop. Furthermore, catalyst systems have been developed that result in a minimal pressure drop increase of the catalyzed filter. Optimization of porosity and cell geometry has enabled fabrication of filters with either high or low thermal mass appropriate to the regeneration strategy employed for a given engine management system.