Optimization of performance and exhaust emissions of single-cylinder diesel engines fueled by blending diesel-like fuel from Yang-hard resin with waste cooking oil biodiesel via response surface methodology

Abstract

The objective of this research was to examine the optimization of performance and exhaust emission of a single-cylinder diesel engine in terms of blending diesel-like fuel (DLF) with waste cooking oil biodiesel (WCOB) and engine speed. This is the first study on the use of pyrolytic oil from Yang hard resin (HY) to investigate the performance of diesel engines. Different mixing ratios of WCOB in diesel-like fuel (DLF) from HY (6–34% Vol) and engine speed (1034–2166 rpm) were used as input factors in the response surface methodology (RSM) model. The experiment was designed using an RSM model with a rotatable central composite design (RCCD). All models obtained from engine performance and emission variables were statistically significant at a 95% level. The interactive results were presented between variables and responses. The DLF-WCOB blends showed a positive impact on both engine performance and exhaust emissions. The desirability approach-based RSM was used to predict the optimal conditions of engine operation whose parameters were predicted to be 23% waste cooking oil biodiesel and 1700 rpm engine speed. The results of brake torque, brake power, BSFC, BTE, CO, CO2, and NOX at optimal parameters were 28.4 Nm, 5.0 kW, 253 g/kWh, 32.99%, 0.48%, 12.53% and 133.4 ppm, respectively. RSM was powerful enough to predict the intended response parameters of this study. The DLF-WCOB (~20%) blend can be used as an alternative diesel engine fuel.