Improving NOx Emissions by Large Amount of Cooled EGR of DME Diesel Engine

DME (Dimethyl Ether) is a clean fuel, which does not produce toxic gases or particulate matters after burning process. JFE group develops a direct synthesis process of DME, which has advantage in economics. Construction of demonstration plant with 100t/day capacity had been finished in November 2003 and total trial operation was completed successfully during December 2003. JFE group has also been developing MW-class diesel generating system since 2002 as an application of DME fuel. This paper describes about the characteristic of NOx emissions by a large amount of cooled EGR of 50kW DME diesel engine bench.