Experimental Investigation on Reduction in Exhaust Emissions of CI Engine by Mixed treatment of EGR, Catalytic Converter and Air-Dilution System using Blends of Jatropha Biodiesel

Today world faces two major crises, depletion of fossil fuel and environmental degradation. So for solve both problems, renewable alternative fuel should be necessary with minimum impact on environment. There are many alternative fuels in the world likes biodiesel, alcohols, pyrolysis oil, CNG, LPG etc. But among all of them biodiesel is a most one. In this content, Biodiesel was used as an alternative fuel. But with the use of biodiesel increasing in NOx emission so to comply with upcoming stringent emissions pre and post treatment are necessary to reduce emissions. In these experiment blends of biodiesel are used such as B0, B5, B10, B15, B20, B25 and B30. In these experimental performance parameters such as brake thermal efficiency, brake specific fuel consumption was measured and emission parameters like CO, HC, CO2, NOx, smoke and odour are measured. With used of EGR NOx is reduced but HC, CO and smoke are increased so to reduced exhaust emission, three combined systems were used such as Air Dilution system for smoke and odour, EGR for NOx and Catalytic Converter for HC and CO emissions. It has been noticed that emissions such as CO, HC, smokes, odour and NOx significantly decreased by use of three combined system such as air dilution system, EGR and catalytic converter. Highest brake thermal efficiency observed with B30 blend and lowest NOx emissions observed for B20.