Journal of Fundamentals of Renewable Energy and Applications
Open Access

Studies of the catalytic properties of oxides doped with tungsten for the production of biodiesel ethyl

International Congress and Expo on Biofuels & Bioenergy

August 25- 27, 2015 Valencia, Spain

Passerine B F G, Mancini M, Coelho A, Rossi J S, Guebara P F, Perrone O M and Boscolo M

Posters-Accepted Abstracts: J Fundam Renewable Energy Appl

Abstract :

In an attempt to optimize the production of biodiesel by basic heterogenic catalysts, anionic clays of hydrotalcite type have
been prepared by co-precipitation method, with fixed molar ratio M+2 / M+3 (3: 1) doped with tungsten in two different
oxidation statesW (IV) and W (VI), with the percentage of 1 to 5% to improve its catalytic effect in the transesterification
reaction of ethyl biodiesel. The reaction was maintained for 12 hours / 120°C in a molar ratio of oil / ethane 1:20 to 20%
(w / w) of catalyst in relation to the oil. The characterization of oxides and hydrotalcites occurred by thermogravimetric
analysis (TG - isotherm for 90°C, heating ramp from 100 to 450 °C and 15°C/min, N2 flow 20 ml/min) and analysis of specific
surface area by the BET method, diffraction X-rays (DRX - CuK radiation (λ=1.54 Å) in an angular range of 3 to 70, 2е per
minute) and infrared spectroscopy (FTIR-ATR - the region of 400 to 4000 cm-1) and its activity catalytic was quantified by
gas chromatography with flame ionization detector (GC-FID). The maximum conversion achieved was 84.23%. Analyzing the
FTIR spectra, the diffraction patterns of Xray and thermal analysis were obtained characteristic properties of pure hydrotalcite,
featuring absence of secondary phase in hydroxides.

Biography :

Passerine B F G is a graduate student of Environmental Chemistry at the State University of São Paulo “Júlio de Mesquita Filho”, where she works at the Sucrochemistry
and Analytical Chemistry Laboratory in the bioenergy field.