The effects of waste engine oil and alcohol use as additional fuel in a diesel generator used in small-scale power generation on emission

In the study, the effect of utilizing waste motor oil and alcohol as an alternative fuel in a diesel generator used in small-scale energy production on emissions was investigated. In the experimental study, 20% of waste motor oil was added in diesel fuel, then 3 different proportions (5%, 10% and 15%) of ethanol, propanol, iso-propanol and butanol alcohols were added to this mixture. Experimental studies were carried out on a four-stroke, air-cooled diesel engine generator set. In the experiments, the fuel consumption and emission results were determined by drawing a constant power (5000 W) from the generator. In the results, it was found that the Specific Fuel Consumption (SFC) increased with the addition of alcohol to the diesel -waste engine oil mixture and the highest SFC was obtained in the fuel mixture where 15% ethanol was added. It was observed that butanol addition to the diesel-waste motor oil mixture decreased the SFC and the lowest SFC was obtained when compared to other alcohol type mixtures. In the emission results, the use of diesel -waste engine oil mixture increased the CO, HC, and soot emissions while alcohol addition to the diesel -waste engine oil mixture reduced these emission values.