Performance and Emission Studies in a Diesel Engine Using Bio Oil-Diesel Blends

Abstract

Bio oil from pyrolysis is considered as an alternate fuel for diesel engine. In recent years some pilot plants of pyrolysis process for the production of bio oil from biomass have been established in many countries. The main problems associated with the use of pyrolysis oil in diesel engines have to be removed in order to use the bio oil in a wide range of commercial applications. An attempt was made to use modified bio oil blended with diesel fuel in a single cylinder, four stroke, air cooled, DI diesel engine. The performance and exhaust emissions such as unburned hydrocarbons [UBHC], carbon monoxide [CO], carbon-di-oxide [CO2] and nitric oxide [NO] were measured from the diesel engine at different power outputs. The performance and exhaust emissions were studied from the engine with three different WPO based fuels such as WPO diesel emulsion, and two WPO diesel emulsions with addition of 2% and 4% Diethylether. The results were compared with the diesel fuel data, analysed and it is presented in this paper.It is observed from the results that 1.94%, 3.02% and 2.94% increase in the brake thermal efficiency was achieved with WPO10, WPO10 with 2%DEE and WPO10 with 4%DEE. The NO and HC emissions were lower with only WPO diesel emulsion.For the other emulsions the HC and NO emissions were higher than diesel fuel operation.