1. Graduate Chemical Engineering Program, Federal University of Rio Grande do Norte (UFRN), Natal, RN 59078-970, Brazil
2. Department of Petroleum Engineering, Federal University of Rio Grande do Norte (UFRN), Natal, RN 59078-970, Brazil
3. Departament of Chemical Engineering, Federal University of Rio Grande do Norte (UFRN), Natal, RN 59078-970, Brazil