文章基本信息

标题：Estudo termodinamico do equilíbrio líquido-líquido para o sistema acetato de etila + ácido acético + água
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作者：Jefferson Jeremias Silva ; Daniel Marcondes de Mello ; Ricardo Francisco Pires 等
期刊名称：Research, Society and Development
电子版ISSN：2525-3409
出版年度：2022
卷号：11
期号：7
页码：1-15
DOI：10.33448/rsd-v11i7.29685
语种：English
出版社：Grupo de Pesquisa Metodologias em Ensino e Aprendizagem em Ciências
摘要：When pairs of liquid chemical species are mixed, biphasic regions may appear in the system instead of a monophasic region. When these phases are in equilibrium, it tells you which system is in liquid-liquid equilibrium. This phenomenon has great relevance in the industrial environment and in unit operations, such as liquid-liquid extraction. In this work, the thermodynamic modeling of a ternary system composed of water + acetic acid + ethyl acetate was carried out at two temperatures, 10 and 30oC. The thermodynamic consistency of the experimental data was verified from the correlations of Othmer-Tobias and Hand, obtaining a correlation coefficient greater than 0.99, showing good consistency. The solvent extraction capacity (ethyl acetate) to separate the solute (acetic acid) was evaluated from the distribution coefficient and the separation factor. Thermodynamic modeling was used to predict the liquid-liquid equilibrium from the Non-Random Two-Liquids (NRTL) models and the Universal Quasi-Chemical (UNIQUAC) method using the gamma-gamma approach to compare with the results obtained experimentally. The global mean deviations were 1.63% and 2.39 for the UNIQUAC and NRTL models respectively, thus showing that they are effective in predicting the liquid-liquid equilibrium.
关键词：Thermodynamics Teaching;NRTL;UNIQUAC;Gamma-gamma approach;Thermodynamic modelling.