Experimental investigation on performance and emission characteristics of single cylinder CI engine using waste cooking oil (WCO) with diethyl ether (DEE)

Abstract

The objective of this paper is to investigate the performance and emission characteristics of WCOME (waste cooking oil methyl ester) blended with DEE (diethyl ether). The present work deals with the utilization of waste cooking oil (WCO) as feedstock for biodiesel production via transesterification process by using an alkali catalyst (KOH – 1.5 wt. %) with alcohol (methanol) under molar ratio (1:6). The concluding properties of WCOME like viscosity, density, flash point and cv were fitured by ASTM/EN standard and were resulted to be equivalent to ASTM/EN standard for diesel. Various test fuels were prepared for the engine trials by blending 10%, 20% and 30% of WCO biodiesel in diesel on volumetric basis and cognominated as diesel-biodiesel blends (B10,B20&B30 respectively) and also added 5% DEE (as an additive) in same diesel-biodiesel blends on volumetric basis and designated as diesel-biodiesel-DEE blends (B10DEE5, B20DEE5 & B30DEE05 respectively). Among all the tested blends in this study, it was observed that addition of 20% WCO biodiesel (i.e. B20 & B20DEE5 blends) spectacle the best-improved results at the full load as compared to diesel fuel, with and without the addition of 5% DEE. For 20% biodiesel blends (i.e. B20 & B20DEE5 blends) at the full load, BTE was found to be increased by 3.50 % without DEE and 0.5 % with 5% DEE addition respectively, BSFC decreased by 20.83% & no change with 5% DEE, EGT decreased by 13.33% & 8.13% with 5% DEE, NOx decreased by 9.69% & 8.59% with 5% DEE, HC decreased by 27.59% but increased by 17.24% with 5% DEE, CO does not show any change at full load, SO decreased by 49.24% & 64.89% with 5% DEE & decreased by 98.04% using DPF with 5% DEE and the CO2 was increased by 1.89% & 3.77% with 5% DEE as compared to diesel fuel. Hence, 20% biodiesel blending shows the best performance and emissions results as compared to diesel fuel.