*Dr J.O. Babajide & Dr (Mrs) O.O. Babajide
*Chemistry Department, Adeyemi College of Education, Ondo
Integrated Science Department, Adeyemi College of Education, Ondo.
Energy plays a vital role in the socio-economic development and national security. However, current patterns of energy supply and energy use are unsustainable because of the high environmental issues such as global warming arises from energy consumption and pollution. There is a big concern on the availability of recoverable fossil fuel energy reserves and the environmental problems and challenges caused by the use those fossil fuels, considerable attention has been diverted to biodiesel production as an alternative to fossil diesel. Another impending danger is the production of biodiesel from vegetable oils and animal fats as feedstock which is competing with food supply. Hence, the recent focus is to find oil bearing plants that produce non-edible oils as the feedstock for biodiesel production. A large variety of plants that produce non-edible oils were already considered for biodiesel production such as Madhuca Indica (Mahua), Jatropha curcas, Pongamia pinnata (Karanja) etc. but with their own limitations and defects. In this paper, four plant species, are discussed as newer sources of oil for biodiesel production. The non-edible plant oils of Moringa oleifera, Dialium indium, Chrysophyllum albidum and Dacryodes edulis were investigated for their use as biodiesel feedstock. A two-step transesterification process was used to produce biodiesel from high free fatty acid (FFA) of the non-edible oils. This process gives yields of 97.5 – 98.9 % of biodiesel using potassium hydroxide (KOH) as a catalyst. The fuel properties of biodiesel produced were compared with fossil diesel. The properties of the oils analysed showed that biodiesel from these non-edible oils are comparable with ASTM biodiesel standards and is quiet suitable as an alternative to fossil diesel. Experimental results showed that all the oils have great potential to be used as feedstock for biodiesel production with minimal limitations and defects.