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
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.
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.
