Environmental aspects and challenges of oilseed produced biodiesel in Southeast Asia

Research on alternative fuel for the vehemently growing number of automotivesis intensified due to\ud environmental reasons rather than turmoil in energy price and supply. From the policy and steps to\ud emphasis the use of biofuel by governments all around the world, this can be comprehended that biofuel\ud have placed itself as a number one substitute for fossil fuels. These phenomena made Southeast Asia a\ud prominent exporter of biodiesel. But thrust in biodiesel production from oilseeds of palm and Jatropha\ud curcas in Malaysia, Indonesia and Thailand is seriously threatening environmental harmony. This paper\ud focuses on this critical issue of biodiesels environmental impacts, policy, standardization of this region as\ud well as on the emission of biodiesel in automotive uses. To draw a bottom line on feasibilities of different\ud feedstock of biodiesel, a critical analysis on oilseed yield rate, land use, engine emissions and oxidation\ud stability is reviewed. Palm oil based biodiesel is clearly ahead in all these aspects of feasibility, except in\ud the case of NOx where it lags from conventional petro diesel