**Heterogeneous Catalysts Based on H3PW12O40 Heteropolyacid for Free Fatty Acids Esterification**

Marcio Jose da Silva1, Abiney Lemos Cardoso1, Fernanda de Lima Menezes1, Aline Mendes de Andrade1 and Manuel Gonzalo Hernandez Terrones2 *1Federal University of Viçosa/Chemistry Department, 2Federal University of Uberlândia/Chemistry Institute, Brazil* 
