%0 Journal Article %T The performance of simulated annealing in parameter estimation for vapor-liquid equilibrium modeling %A Bonilla-Petriciolet %A A. %A Bravo-S¨˘nchez %A U. I. %A Castillo-Borja %A F. %A Zapiain-Salinas %A J. G. %A Soto-Bernal %A J. J. %J Brazilian Journal of Chemical Engineering %D 2007 %I Brazilian Society of Chemical Engineering %R 10.1590/S0104-66322007000100014 %X in this paper we report the application and evaluation of the simulated annealing (sa) optimization method in parameter estimation for vapor-liquid equilibrium (vle) modeling. we tested this optimization method using the classical least squares and error-in-variable approaches. the reliability and efficiency of the data-fitting procedure are also considered using different values for algorithm parameters of the sa method. our results indicate that this method, when properly implemented, is a robust procedure for nonlinear parameter estimation in thermodynamic models. however, in difficult problems it still can converge to local optimums of the objective function. %K vapor-liquid equilibrium %K simulated annealing %K nonlinear parameter estimation %K error-in-variable method %K global optimization. %U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0104-66322007000100014&lng=en&nrm=iso&tlng=en