Goncalves, Cintia B.
Coutinho, Joao A. P.
Total Authors: 3
 Univ Estadual Campinas, Dept Proc Quim, Fac Engn Quim, BR-13083852 Campinas, SP - Brazil
 Univ Sao Paulo, Fac Zootecnia & Engn Alimentos, BR-13635900 Pirassununga - Brazil
 Univ Aveiro, Dept Quim, Ctr Invest Mat Ceram & Compositos CICECO, P-3810193 Aveiro - Portugal
Total Affiliations: 3
ENERGY & FUELS;
Web of Science Citations:
In the present work, a group contribution method is proposed for the estimation of viscosity of fatty compounds and biodiesel esters as a function of the temperature. The databank used for regression of the group contribution parameters (1070 values for 65 types of substances) included fatty compounds, such as fatty acids, methyl and ethyl esters and alcohols, tri- and diacylglycerols, and glycerol. The inclusion of new experimental data for fatty esters, a partial acylglycerol, and glycerol allowed for a further refinement in the performance of this methodology in comparison to a prior group contribution equation (Ceriani, R.; Goncalves, C. B.; Rabelo, J.; Caruso, M.; Cunha, A. C. C.; Cavaleri, F. W.; Batista, E. A. C.; Meirelles, A. J. A. Group contribution model for predicting viscosity of fatty compounds. J. Chem. Eng. Data 2007, 52, 965-972) for all classes of fatty compounds. Besides, the influence of small concentrations of partial acylglycerols, intermediate compounds in the transesterification reaction, in the viscosity of biodiesels was also investigated. (AU)