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Química Nova

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BRUM, Sarah S; SANTOS, Valéria C.dos; DESTRO, Priscila  and  GUERREIRO, Mário César. Esterification of fatty acids using sulfated zirconia and composites activated carbon / sulfated zirconia catalysts. Quím. Nova [online]. 2011, vol.34, n.9, pp.1511-1516. ISSN 0100-4042.

In this work sulfated zirconia (SZr) and activated carbon/SZr composites produced by impregnation method with or without heating treatment step (CABC/SZr-I and CABC/SZr-I SC) and by the method of synthesis of SZr on the carbon (CABC/SZr-S) was used as catalysts in the esterification reactions of fatty acids. The SZr presented very active, conversions higher than 90% were obtained after 2 h of reaction. The activity of the composite CABC/SZr-I20%SC was up to 92%, however, this was directly related to time and temperature reactions. CABC/SZr-I and CABC/SZr-S were less active in esterification reactions, what could be attributed to its low acidity

Keywords : acid catalysis; esterification; biodiesel.

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