1. Department of Chemical Engineering, UFSCar-Federal University of São Carlos, Via Washington Luiz, km 235, C. Postal 676, CEP 13565-905 São Carlos, SP, Brazil, and Department of Chemical Engineering, UNAERP-University of Ribeirão Preto, Avenida Costábile Romano 2201, C. Postal 98, CEP 14096-380 Ribeirão Preto, SP, Brazil