Effect of injection timing on performance and emission characteristics of single cylinder diesel engine running on blends of diesel and waste plastic fuels

Environmental concern, increasing fossil fuel demands and depleting fossil fuel reserves have caused interests in the search for alternate fuels for internal combustion engines. Waste plastics are indispensable materials in the modern world and application in the industrial field is continually increasing. In this context, waste plastic solid is currently receiving renewed interest. the recycling of the waste plastic for renewable energy generation is receiving more attention nowadays. The present study deals with utilization of waste plastic pyrolysed oil in single cylinder diesel engine with varying injection timing. The pyrolysis of mixed waste plastic was carried out at 400oC-550oC in a fixed bed reactor. The physic chemical properties such as calorific value density, viscosity, cloud point, pour point, flash point of the plastic fuel and its blends with diesel (PF10,PF20,PF30) was analysed using standard methods and found under ASTM standards. To see the effect of injection timing on performance and emission, a single cylinder diesel engine was run on plastic fuel blends at the two different angles (10o retard and the 8o advance before the TDC). The results showed that at advanced condition BTE, CO, UHC, CO2 and smoke increased while BSFC and NOx decreased with the increasing load.