Improvement of performance and emission characteristic of waste plastic pyrolytic oil blended diesel fuel in variable compression diesel engine using graphene nano additive

Abstract

A growing interest in extracting oil from waste plastics has converged with rising demand for petro-fuels and issues in disposing of waste plastics. The characteristics of pyrolytic oil produced from plastic wastes were compared to diesel and found to be sufficiently similar to be used as an alternative fuel. In this paper, an attempt has been taken to enhance the combustion properties of waste plastic oil blended diesel following dispersion of nanographene particles. The performance and emissions of a single-cylinder direct injection compression ignition engine with compression ratios ranging from 16:1 to 18:1 was evaluated using 50, 70, and 100 ppm by using 50, 70, and 100 ppm by mass of nanographene dispersed in 20% waste plastic oil blended diesel without any engine modification. By supercharging the engine with nanographene at various compression ratios, the performance of a 20% plastic oil blended diesel is compared to that of a neat diesel. The brake thermal efficiency of 20% plastic oil blended 100 ppm graphene dispersed diesel fuel increased by 1.16% at a compression ratio of 17:1 when compared to diesel. The CO, HC, NOx emissions also dropped significantly by adding 100 ppm nanographene to WPO as compared to the other combinations of fuels.