EXPERIMENTAL STUDY OF RECYCLING LUBRICATING OIL TO BE USED AS A DIESEL ENGINE FUEL

Abstract

The comparative spray characteristics of petroleum diesel, RWLO (Recycled Waste Lubricating Oil)-diesel and RWLO-diesel-kerosene blends were reported by using diesel fuel injector and tested inside a pressurized injector chamber. Spray penetration increased by about 30 % and spray angle decreased by about 47 % when compared to W0 upon using 40 % by volume RWLO (W40). Using kerosene as an additive showed an opposite behaviour on the spray characteristics. The percentage by which kerosene was added as an additive was determined according to the spray behavior by adding kerosene gradually until reaching to the right mixture Using RWLO as a fuel up to 40 % of the mixture reduced the brake thermal efficiency by about 12 % while the brake specific fuel consumption, unburned hydrocarbons emissions and carbon monoxide emissions increased by about 21, 52 and 22 % respectively when compared to pure diesel.