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Global warming with stringent emission legislation along with the depletion of fossil fuel has given us an opportunity to find biodiesel as alternative to diesel fuel. Biodiesel has been widely accepted as comparable fuel to diesel in diesel engine. This is due to its renewable property, better lubricity, along with lesser gaseous emission as compared to diesel fuel. However, there is a major disadvantage in the use of biodiesel as it increases NOx emission. Fuel additive becomes one of the essential tools to overcome the drawback of biodiesel required to meet the international standard of performance and emission. In this study, the performance, combustion, and gaseous emission of CO, CO2, HC, NOx and PM including particle size number distribution characteristics, were compared for diesel, Karanja oil biodiesel, and Karanja oil biodiesel with Cerium Oxide Nano particles fuel additive, in a 12 cylinder, 585 kW, CIDI military diesel engine.

Rapid depletion of petroleum reserves, stringent emission legislations and global warming has given us an opportunity to find biodiesel as an alternative to diesel fuel. Biodiesel is a biogradable, renewable, sulphur free, non-toxic, and oxygenated green fuel. Recent emission legislations have also restricted the nano particles emission in addition to particulate matter, due to their adverse impact on health. Karanja and Jatropha oils are non-edible vegetable oils. Karanja and Jatropha oil methyl ester biodiesel are prepared by the process of transesterification. Biodiesel emits lesser gaseous emission as compared to diesel fuel. However, the only major concern in the use of biodiesel is that it increases NOx emission. Nano particle fuel additive is one of the essential techniques to overcome the NOx emission drawback of biodiesel.