The role of bio-diesel as an alternative fuel

In the present scenario, the depletion of world petroleum reserves results in two crisis that are raising prices of fuel and global warming. These fossil fuel reserves may exhaust by 2050. The combustion products of these fossil fuels are causing peak environmental pollution. Hence efforts are being made to find the alternatives. Among all the alternative energy sources, the potential for biofuel energy is numerous. The government is paying considerable attention for the utilization of renewable energy, especially biofuels. Biodiesel is made from vegetable oil, animal fats and non edible seeds. To understand the current scenario about biodiesel utility and its related issues an extensive literature survey has been carried out. The present review highlights the various issues related to biodiesel such as performance emission, and combustion characteristics of a compression ignition diesel engine when it is used as a substitute fuel for unmodified compression ignition engines.