versión impresa ISSN 0100-4042
GAMA, Paola Ervatti; GIL, Rosane Aguiar da Silva San y LACHTER, Elizabeth Roditi. Biodiesel production by in situ transesterification of sunflower seeds by homogeneous and heterogeneous catalysis. Quím. Nova [online]. 2010, vol.33, n.9, pp. 1859-1862. ISSN 0100-4042. http://dx.doi.org/10.1590/S0100-40422010000900007.
The objective of this work is to show the results of the in situ transesterification of sunflower seed oil with methanol on basic homogeneous and heterogeneous catalysis for the production of biodiesel. In homogeneous catalysis, the activity of KOH and K2CO3 were evaluated using the same oil:methanol ratio of 1:90. KOH showed to be more active than K2CO3, leading to total conversion in biodiesel after 1h reaction time. In the heterogeneous catalysis the activity of K2CO3/Al2O3 was comparable to the activity of K2CO3 bulk: 53.0 and 66.6% resp. The properties of samples of biodiesel produced by homogeneous and heterogeneous catalysis were evaluated and are in accordance with the recommended fuel properties.
Palabras llave : biodiesel; in situ transesterification; basic catalysis.