Simultaneous Reduction of NOx and Smoke Using Water Emulsion of Karanji Oil Methyl Ester In a DI Diesel Engine With Exhaust Gas Recirculation pp. 265-282
Authors: (Sukumar Puhan, A. Gopinath, K. Sairam, Department of Mechanical Engineering, Vel Tech Multi Tech Engineering College, Avadi, Chennai, India)
Abstract: Among the different possible sources, the methyl esters of vegetable oils, known as biodiesel is receiving increasing interest because of their low environmental impact. In addition biodiesel fuel may not require any significant modification of existing diesel engines. The present investigation focuses on the study on simultaneous reduction of NOx and smoke by water emulsion of Karanji oil methyl ester in a single cylinder, direct injection diesel engine with exhaust gas recirculation. The quantity of EGR was varied from 5 % (by vol.) to 15 % (by vol.) in steps of 5 % (by vol.). The quantity of water was varied from 5 % (by vol.) to 15 % (by vol.) in steps of 5% (by vol.). Water-emulsified diesel fuel with EGR technology has been proven to reduce nitrogen oxides (NOx) and smoke simultaneously at relatively low cost compared to other pollution-reducing strategies. From the test results, it is observed that water emulsion and EGR technology results in a substantial reduction of NOx by 66 % and smoke emissions by 50 % with a compromise of 2.5 % on thermal efficiency.