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Type: Artigo de periódico
Title: Parameter estimation for VLE calculation by global minimization: The genetic algorithm
Author: Alvarez, VH
Larico, R
Ianos, Y
Aznar, M
Abstract: Vapor-liquid equilibrium calculations require global minimization of deviations in pressure and gas phase compositions. in this work, two versions of a stochastic global optimization technique, the genetic algorithm, the freeware MyGA program, and the modified mMyGA program, are evaluated and compared for vapor-liquid equilibrium problems. Reliable experimental data from the literature oil vapor liquid equilibrium for water + formic acid, tert-butanol + 1-butanol and water + 1,2-ethanediol systems were correlated using the Wilson equation for activity coefficients, considering acid association in both liquid and vapor phases. The results show that the modified mMyGA is generally more accurate and reliable than the original MyGA. Next, the mMyGA program is applied to the CO2 + ethanol and CO2 + 1-n-butyl-3-methylimidazolium hexafluorophosphate systems, and the results show a good fit for the data.
Subject: genetic algorithm
vapor-liquid equilibrium
activity coefficient
parameter estimation
global optimization
Country: Brasil
Editor: Brazilian Soc Chemical Eng
Rights: aberto
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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