Simultaneous PM and NOx Reduction System for Diesel Engines

A new after-treatment system called DPNR (Diesel Particulate-NOx Reduction System) has been developed for simultaneous and continuous reduction of particulate matter (PM) and nitrogen oxides (NOx) in diesel exhaust gas. This system consists of both a new catalytic technology and a new diesel combust...

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Bibliographic Details
Main Authors: Nakatani, Koichiro, Hirota, Shinya, Takeshima, Shinichi, Itoh, Kazuhiro, Tanaka, Toshiaki, Dohmae, Kazuhiko
Format: Report
Language:English
Online Access:Request full text
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Summary:A new after-treatment system called DPNR (Diesel Particulate-NOx Reduction System) has been developed for simultaneous and continuous reduction of particulate matter (PM) and nitrogen oxides (NOx) in diesel exhaust gas. This system consists of both a new catalytic technology and a new diesel combustion technology which enables rich operating conditions in diesel engines. The catalytic converter for the DPNR has a newly developed porous ceramic structure coated with a NOx storage reduction catalyst. A fresh DPNR catalyst reduced more than 80 % of both PM and NOx. This paper describes the concept and performance of the system in detail. Especially, the details of the PM oxidation mechanism in DPNR are described.
ISSN:0148-7191
2688-3627
DOI:10.4271/2002-01-0957