Production of Paraffinic Fuel by Hydrotreatment of Waste Sunflower Cooking Oil Using Nobel Catalyst

The work reported here is about the combustion characteristics, performance, and emission analysis of the hydrotreated waste cooking oil as fuel in vertical, 4.3 kW, DI 4S diesel engine with compression ratio of 17.5:1, at a constant speed of 1500 rpm. The waste sunflower cooking oil was hydrotreated in the high-pressured trickle bed reactor. The HR538 type of (Ni-Mo/Al2O3) was used as catalyst. The waste sunflower cooking oil was treated with catalyst at 6 MPa and at a temperature of 633 K. The two fuels prepared for testing are 25% hydrotreated waste cooking oil fuel blended with petro diesel (B25) and (B100) which is 100% neat hydrotreated fuel. At different loading conditions, these fuels were tested in the diesel engine. The emission and performance of the hydrotreated waste cooking oil showed significant decrease in CO, HC, NOx, smoke, brake specific fuel consumption and increase in brake thermal efficiency when compared with petro diesel.