Resumen

LAFONT, Jennifer J; PAEZ, Manuel S  y  TORRES, Yudi C. Chemical Analysis of Mixtures of Biodiesel from Used Cooking Oil and Diesel by Infrared Spectroscopy . Inf. tecnol. [online]. 2011, vol.22, n.4, pp. 35-42. ISSN 0718-0764.  http://dx.doi.org/10.4067/S0718-07642011000400005.

An efficient method to determine the optimum percentages of blends biodiesel from used oil and diesel for automotive use, is proposed. The procedure consists of recollection of used frying oil, residue cleaning and synthesis of biodiesel by a transesterification reaction with different molar proportions of methanol/oil. The samples were analyzed by infrared spectroscopy. It was found that a ratio methanol/oil of 1:8 showed higher performance in the production of biodiesel. The infrared spectra showed an increase in the carbonyl peak of the methyl esters with the increase of the concentration of biodiesel in the mixtures biodiesel+diesel. It is concluded that proposed technique complies with the Beer-Lambert law and it is a good method to quantify these types of mixtures.

Palabras llave : blends biodiesel/diesel; Infrared spectroscopy; frying oil; physicochemical properties.