Comparative study of biodiesel production from Jatropha curcas and waste cooking oil as a substitute for fossil (mineral diesel) in Nepal.
Biodiesel has become the most important and demanding source of energy all around the world. In context of Nepal it plays an important role due to dependency of fossil fuels to foreign countries. Biodiesel itself is a replacement to fossil diesel which minimizes environmental effects by emitting comparatively lower quantity of pollutants than diesel. The main objective of this research work was based on the production of biodiesel from Jatropha curcas plant from Okhaldhunga district and waste non-reusable cooking oil obtained from local restaurants in Kathmandu Valley. Biodiesel was produced by two step processes: 1) Esterification of oils with methanol and acid catalyst (H2SO4) at 600C in water bath shaking for 3 hours 2) Transesterification with methanol and base catalyst (NaOH) at 600C for an hour. These two reactions were optimized and optimized condition for esterification was done at 35% w/w of methanol and 1.5% w/w of H2SO4 and transesterification was done at 0.5% w/w NaOH and 30% methanol which gave about 90% product recovery of biodiesel. Similar conditions were used for production of biodiesel from the waste cooking oil. Thus, biodiesel from both sources were produced and they were compared based on purity, cost effective, physical parameters with the fossil diesel.
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