ABSTRACT
Worldwide biodiesel is being produced mainly from edible and nonedible vegetable oils. e choice of vegetable oils depends primarily on availability, price, and the policy adopted by governing agencies. Many countries are making their policies to produce nonedible vegetable oils on large scale. e economic aspects of biodiesel production are a barrier for its commercial success. Presently, the current prices of fossil fuels are lower than the cost of biodiesel. However, research on biodiesel production processes will result in multidirectional benets, namely, employment generation (particularly in rural areas), ecient usage of waste and fallow land, drought proong, energy security for country and promotion of organic farming, and less dependency on foreign exchange. e production of biodiesel from nonedible vegetables oils may oer solutions for various issues involved in the assessment of biomass-based industry for energy generation. Transesterication of nonedible vegetable oils using heterogeneous catalyst in an ultrasonic-assisted reactor could be an eective approach to produce a clean and renewable source of energy. Biodiesel can be used as a blend with mineral diesel in the existing engine to mitigate environment emissions.
