Exhaust emissions and Performance of Diesel Engine Operating on Biomass-based Oil Blends and their Water-fuel Emulsions

摘要

We experimentally evaluate a performance and exhaust emissions of a single cylinder, four stroke direct injection diesel engine operating on diesel fuel containing 50 percent volume waste soybean oil (Blend 50), waste soybean oil containing 50 percent waste polystyrene pyrolysis oil (Blend PS), soybean oil methyl ester (VDF) and their water-fuel emulsions. The combustion characteristics and emissions such as NOx, CO, HC, HCHO, O_2, CO_2, smoke degree and particle size distribution of exhaust particulate are compared with the case of JIS # 2 diesel fuel. Fuel consumption and indicator diagram in cylinder were measured, and carbon deposit on cylinder head were observed after 400 hours operating on Blend 50. Based upon evaluation of engine performance and emissions, biomass blends and water emulsified fuels appear to be renewable, ecologically acceptable fuels of diesel engine. Diesel engine/Generator can be operated on biomass fuels such as Blend PS and Blend 50 to produce electric power as the distributed power system. Also discussed are the usability of biomass-based fuels as alternative fuel, as well as availability for treatment processes of the waste plant oil and waste plastics.