Comparative study of extraction methods and properties of non edible oils for biodiesel production.

Due to the limited availability of fossil fuel and environmental problems, considerable attention has been given to biodiesel production as an alternative to petro diesel. In this connection the non-edible seeds of Caryota urens, Bassia longifolia and Saraca asoca were analysed for their oil properties and fatty acids. Four different methods are tried for oil extraction among them physical method is more suited compared to Bligh and Dyer, Folch et al. and Chemical solvent extraction method and among the three seeds B. longifolia yields more oil (40mg/g) compared to S. asoca (35gm/g) and C. urens (25gm/g) and the physico-chemical properties of the oil from B. longifolia seeds was found to be acid value 6.5mg KOH/g, Iodine value 114g/100g and viscosity mm2 /sec – 38.2 which perform better for biodiesel production compared to the other two and among fatty acids oleic acid is also higher in B. longifolia (69%); hence B. longifolia is a better non-edible oil seed for biodiesel production than C. urens and S. asoca.

Author(s): Sirangala Thimappa Girisha*, Krishnappa Ravikumar, Bangalore Radhakrishna Mrunalini and Venkatachalapathy Girish

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