Resumen

SOTO-LEON, S. et al. Jatropha cinerea seed oil as a potential non-conventional feedstock for biodiesel produced by an ultrasonic process. Rev. Mex. Ing. Quím [online]. 2014, vol.13, n.3, pp.739-747. ISSN 1665-2738.

This work demonstrates that Jatropha cinerea (J. cinerea) seed oil has potential as a new, non-conventional, bio-energy resource. The physical and chemical properties of J. cinerea seeds, collected from its natural habit, were evaluated. The length-, diameter- and weight- of seeds were in the ranges of 8 to 12 mm, 7.5 to 11 mm, and 0.2 to 0.7 g, respectively. Additionally, the amount of oil in the seed kernel was 65.77 wt.%, and it contained 15*% saturated, 33% monounsaturated, and 51% polyunsaturated fatty acids. The major constituent (50 .8 wt%) of crude J. cinerea oil was linoleic acid. Based on its content of phorbol esters (0.22 mg g^-1), J. cinerea was considered to be a non-toxic Jatropha species. Iodine, saponification, and acid values of the J. cinerea seed oil were similar to those of the J. curcas seeds oil; therefore, it was suggested that J. cinerea oil had the quality required for biodiesel production from J. cinerea seeds oil was produced by a sonotransesterification process, evaluating the effect of the methanol: oil molar ratio (MOR), temperature, and reaction time. The best conditions for biodtesel production were 25°C, a MOR of 4:1, and a notably short reaction time of 20 s. These conditions were very advantageous as compared to those required by conventional processes, and very promising for the development of a low cost biodiesel production process using J. cinerea seed oil as a feedstock.

Palabras llave : biofuel; biodiesel; Jatropha; Jatropha cinerea; ultrasonic process; transesterification.

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