Resumo

HINCAPIE, GINA; MORENO, ANDRÉS  e  DIANA, LÓPEZ. TRANSESTERIFICATION OF CRUDE CASTOR OIL BY HETEROGENEOUS CATALYSTS - PRELIMINARY STUDY. Dyna rev.fac.nac.minas [online]. 2011, vol.78, n.169, pp.176-181. ISSN 0012-7353.

In the present study, biodiesel production through transesterification from crude castor oil with ethanol and methanol by heterogeneous catalysts was studied. Calcium oxide, sodium and potassium carbonate and a zinc silicate with a hemimorphite structure were used as catalysts. The formation of alkyl esters was quantified by gas chromatography. The highest conversions were obtained with potassium carbonate in ethanol and hemimorphite in methanol in a concentration of 3% wt. to oil weight, using a molar ratio of alcohol to oil of 60 and after pre-esterification of crude oil. Under these conditions the conversion with potassium carbonate was 74.9% and with hemimorphite was 66.2%.

Palavras-chave : Castor oil; heterogeneous catalysts; hemimorphite..

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