Effects of B20 Fuel and Catalyst Entrance Section Length on the Performance of UREA SCR in a Light-Duty Diesel Engine

摘要

The current study focused on the effects B20 fuel (20 % soybean-based biodiesel) and SCR entrance shapes on a light-duty, high-speed, 2.8L common-rail 4-cylinder diesel engine, at different exhaust temperatures. The results indicate that B20 has less deNO_x efficiency at low temperature than ULSD, and that N_2O emission need to be characterized as well as NH_3 slip. If a mixer and enough mixing length is used, longer divergence section does not improve the deNO_x efficiency significantly under the speed ranges tested.