A oxidação direta do glicerol com o uso de catalisadores macrocíclicos porfirínicos

Abstract

In an attempt to reduce dependence on non-renewable resources, we have researched a lot about alternative sources of biofuel production in the world. Biodiesel is a renewable source and its production is in rapid growth in Brazil. The glycerol is a byproduct of biodiesel production process and consequently an increase of its supply on the market causing a decrease in its commercial value. To add greater economic value to its production is necessary to transform it into other chemicals. One of the main routes of its transformation occurs through chemical oxidation. Due to the ability of organometallic porphyrin complexes to mimic the catalytic activity of cytochrome P-450, the synthesis of these complexes may provide an alternative that maximizes the incorporation of the atoms of these raw materials in the final product, with efficient oxidation reaction. This study aimed to synthesize the catalysts Fe (TPP) Cl, CuTPP and Mn (TPP) Cl and observe the behavior of the most active complex (Fe (III) and Mn (II)) in the reaction of direct oxidation of glycerol, observing the best reaction conditions and the formation of chemicals derived from glycerol. Among which the Mn (TPP) Cl was the most active catalyst, checking total conversion in the oxidation of glycerol with hydrogen peroxide oxidation and solvent chloroform. As products formed can observe 1,3-dihidróxicetona (DHA) as the major product, in addition to observe the formation of acetaldehyde, pyruvic acid, and acetic acid.