Study on the performance and emission characteristics of pyrolytic waste plastic oil operated CI engine using response surface methodology

Depletion of fossil fuels, strict pollution rules, and potential generation of waste plastics strive to focus another facet of value addition by conversion of plastic wastes into alternate fuel for a diesel engine. The current study is intended to optimize the combined influences of engine load, fuel blend, and compression ratio on the performance and emission of a normal diesel engine fueled with waste plastic oil diesel (WPO) blend by using response surface methodology (RSM). Optimum engine performance i.e.maximum brake thermal efficiency and minimum NOx emissions are established using the technique of response surface methodology concerning three different engine input parameters engine load, compression ratios, and fuel blend ratio. The compression ratio of 17, 10% of WPO-diesel blending at full load conditions are found to be optimum input parameters. And accordingly, the brake thermal efficiency of 28.8% and NOx emission of 162.45 ppm are obtained under multi-response optimization techniques. A sensitivity analysis has also been accomplished to clarify the significant contribution of different parameters and their orders of importance. The compression ratio has resulted as the most significant factor followed by load and % fuel blend.