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Química Nova

Print version ISSN 0100-4042On-line version ISSN 1678-7064


SANTOS, Frances R.; FERREIRA, José Carlos Netto  and  COSTA, Stella R. Reis da. Catalytic decomposition of soybean oil in the presence of different zeolites. Quím. Nova [online]. 1998, vol.21, n.5, pp.560-563. ISSN 0100-4042.

The catalytic decomposition of soybean oil was studied in a fix bed reactor at 673 and 773 K and using amorphous silica-alumina and the zeolites USY, H-Mordenite and H-ZSM-5 as catalysts. Both the selectivity and the catalytic activity were determined by studying the product composition resulting from the chemical reactions. Physicochemical characteristics of the catalysts were obtained by X-ray fluorescence, Fourier Transform infrared spectroscopy, 29Si and 27Al Nuclear Magnetic Ressonance and textural analysis. The zeolites USY and H-ZSM-5, showing higher Brönsted acidity, yielded products with higher concentration in aromatic hydrocarbons, whereas with both H-Mordenite and amorphous silica-alumina the main products were paraffins.

Keywords : soybean oil; zeolites; amorphous silica-alumina.

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