Paper Title
Study on the Combustion Characteristics of a Diesel Engine With EGR Using Dee and Biofuel Blends

The combustion and emission characteristics of compression-ignition engine with EGR using diethyl ether and biofuel blends are studied. A four-stroke single cylinder compression ignition engine is used for the experiment. The experiment is carried out at bothconstant and variable enginespeed conditions. The alternative fuels used for the study are DEE and butanol.Butanol isa biofuel that can be produced by alcoholic fermentation of the biomass feedstocks. Itis highly miscible in diesel than other alcohol based fuels and also a high energy density. Diethyl Ether(DEE) also has high miscibility in diesel. DEE has a high cetane number and oxygen content and hence a superior combustion quality. The blends used are neat diesel(D100), Diesel-90% Butanol-10%(D90B10) and Diesel-80% butanol-15% DEE-5%(D80B15DEE5). EGR system is also used in the simulations for studying the effects on emissions. The exhaust emission levelsof HC, CO and NOxare observed. Other engine parameters such as indicated power, brake power, indicated specific fuel consumption and brake specific fuel consumption are analyzed. The D80B15DEE5 blend showed significantly lower emissions with minimal compromise of performance of the engine. Keywords - Combustion, Butanol-diesel blend, Exhaust Gas Recirculation, Emissions.