Waste oils as alternative fuel for diesel engine: A review

Increase in energy demand, stringent emission norms and depletion of oil resources have led the researchers to find alternative fuels for internal combustion engines. On the other hand, waste oils pose a very serious environment challenge because of their disposal problems all over the world. In this context, waste oils are currently receiving renewed interest. The properties of the oil derived from waste plastics, cooking and engines oils were analyzed and compared with the petroleum products and found that it has properties similar to that of diesel. This paper gives a brief review about using waste oil of these three types of oil as a fuel for diesel engines. The conversion process of each type of waste oil is presented. The results obtained from the experimental studies on a diesel engine are discussed.