1. Department of Chemical Engineering; Federal University of Pernambuco; Rua Professor Artur de Sá, S/N; Cidade Universitária; CEP: 50740-521 Recife Pernambuco Brazil
2. Federal Rural University of Pernambuco; Recife Pernambuco Brazil
3. Materials Laboratory; Technological Institute of Pernambuco; Recife Pernambuco Brazil