Influence of Pyrolised Waste Engine Oil into Bioethanol and Biobutanol on the Performance of a Variable Compression Ratio Engine on the Performance- An Experimental Study

Lubricating oil from the engines is not utilized properly and these oils are spoiling the land and groundwater significantly. This study is to utilize pyrolised waste engine oil as an additive into diesel, diesel-ethanol, and diesel-butanol blends for the enhancement of essential properties. The study was conducted in two stages: Initially various proportions of pyrolised waste engine oil were blended with diesel, diesel-ethanol (15% bioethanol) and diesel-butanol (20% biobutanol) blends followed by testing the properties to obtain three fuel blends consisting of one from each category (by comparing the base properties with diesel). Properties of these blends were tested and the performance in a compression ignition engine by varying the fuel injection timing 23, 26, and 29 °before top dead centre) was performed. Results of the property testing depicted that the blend containing 10% pyrolised engine oil and 90% diesel, 20% of pyrolised waste engine oil and 80% diesel-bioethanol blend and 15% of pyrolised waste engine oil with diesel-biobutanol blends were possessing closer properties with respect to diesel. Engine test results indicated that 29° before top dead centre of fuel injection timing was found suitable to the engine fuelled with these fuel blends with respect to the performance and emissions. However, the emissions of hydrocarbons and carbon monoxide produced by these blends at low load conditions were found to be marginally higher compared to diesel.