Jatropha oil methyl ester and its blends used as an alternative fuel in diesel engine

Abstract

Biomass derived vegetable oils are quite promising alternative fuels for agricultural diesel engines. Use of vegetable oils in diesel engines leads to slightly inferior performance and higher smoke emissions due to their high viscosity. The performance of vegetable oils can be improved by modifying them through the transesterification process. In this present work, the erformance of single cylinder water-cooled diesel engine using methyl-ester of Jatropha oil as the fuel was evaluated for its performance and exhaust emissions. The fuel properties of biodiesel such as kinematic viscosity, calorific value, flash point, carbon residue and specific gravity were found. Results indicate that B25 has closer performance to diesel and B100 has lower brake thermal efficiency mainly due to its high viscosity compared to diesel. The brake thermal efficiency for biodiesel and its blends was found to be slightly higher than that of diesel fuel at tested load conditions and there was no difference of efficiency between the biodiesel and its blended fuels. For Jatropha biodiesel and its blended fuels, the exhaust gas temperature increased with the increase of power and amount of biodiesel. However, its diesel blends showed reasonable efficiencies, lower smoke, CO2, CO and HC emissions. Keywords: Jatropha oil, bio-fuels, transesterification, performance and emission characteristics DOI: 10.3965/j.issn.1934-6344.2008.02.032-038 Citation: Hanumantha Rao Y V, Ram Sudheer Voleti, Hariharan V S, Sitarama Raju A V. Jatropha oil methyl ester and its blends used as an alternative fuel in diesel engine. Int J Agric & Biol Eng. 2008; 1(2): 32