Saline extractive distillation process for ethanol purification

The aim of this work is to simulate and to optimize a saline extractive distillation process for purification of ethanol from the ethanol—water binary system. All the work was developed using ASPEN PLUS simulator, version 10.1-0, and the NRTL thermodynamic model developed for calculating activity co...

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Bibliographic Details
Published inComputers & chemical engineering Vol. 24; no. 2; pp. 1689 - 1694
Main Authors Pinto, R.T.P., Wolf-Maciel, M.R., Lintomen, L.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 15.07.2000
Subjects
Azeotropic systems
Distillation
Electrolyte systems
Optimization
Simulation
Distillation
Azeotropic systems
Electrolyte systems
Simulation
Optimization
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Summary:The aim of this work is to simulate and to optimize a saline extractive distillation process for purification of ethanol from the ethanol—water binary system. All the work was developed using ASPEN PLUS simulator, version 10.1-0, and the NRTL thermodynamic model developed for calculating activity coefficients of electrolytic systems, having as goal to get the anhydride ethanol (99.7 wt.%). In the development of this study, four saline agents were tested (NaCl, KCl, KI, CaCl 2). The complete process and a methodology to optimize it were established in the simulator in such a way all variables were optimized. It was verified that using only the saline extractive distillation process, it is possible to purify the ethanol from the fermentation broth composition obtaining a product with high purity. Finally, a comparative study using electrolyte distillation process and the integrated distillation process (simple and extractive distillation) was carried out.
ISSN:0098-1354
1873-4375
DOI:10.1016/S0098-1354(00)00455-5