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原文传递 Reducing Diesel NO(sup x) and PM Emissions of Diesel Buses and Trucks.

题名：	Reducing Diesel NO(sup x) and PM Emissions of Diesel Buses and Trucks.
作者：	rahai, h. r. lu, b.
关键词：	selective catalytic reduction,nitrogen oxides,particulates,emission,diesel engines/air pollution, trucks, buses, exhaust gases, fuel injection systems, asymmetry, investigations, research program/
摘要：	The objective of the present investigation was development of a high efficiency selective catalytic reduction (SCR) system for reducing diesel nitrogen oxides (NOx) and particulate matters of diesel trucks. The investigation was divided into two parts. First the flow characteristics of a coil-shaped injector were investigated using a turbulent jet facility at the Center for Energy and Environmental Research and Services (CEERS) laboratory. For this part of the investigation, air was used as both injection and exhaust gases. Results indicate that the coil injector enhances process between the axial flow and the injecting flow. However, due to the asymmetry of the injection process, the mixing is not uniform and may result in ammonia slippage during the exhaust after treatment process. In part two of the investigations, an SCR system with a separate injector and mixer was developed and the system was tested on the exhaust of a 3-cylinder diesel engine under a moderate load condition, using 36%by weight area as the reducing agent. Results show 81%reduction in NOx emissions. The present investigation provides information on a coil-shaped injector-mixer device as a part of the SCR system that can be scaled for different size diesel engines for significant reductions in NOx emissions. / NOTE: Final rept. / Supplementary Notes: Prepared in cooperation with California State Univ., Long Beach. Sponsored by Department of Transportation, Washington, DC. University Transportation Centers Program. and California State Dept. of Transportation, Sacramento. / Availability Note: Product reproduced from digital image. Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA.
报告类型：	科技报告