Investigation of Equilibrium and Thermodynamic Behavior Using an Entrainer for Azeotropic Mixture Separation

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Alemrajabi, Mahmood | 2013

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 44680 (06)
University: Sharif University of Technology
Department: Chemical and Petroleum Engineering
Advisor(s): Farhadi, Fatollah
Abstract:
Azeotropic separation has multiple difficulties. In order to remove the azeotropes, different solutions are recommended such as the use of entrainers, extractive distillation, and pervaporation. Based on initial condition of the mixture, a decision tree is proposed. As a sample, the Ethanol – Ethyl Acetate system is selected and a new solvent – entrainer is proposed with addition of different salts. The suitable concentrations of salt, entrainers or solvent are tested experimentally to draw the relevant RCM.
A suitable set up is designed and assembled, and then samples are taken to analyze in order to provide T-XY diagram. The pressure also is taken into account to correct its effect. Amoung 8 types of entrainers, salts and solvents, the best is proposed, considering the safety, cost and difficulty of solvents or entrainers recovery. Process simulator predictions are compared against experimental results to evaluate suitable thermodynamic system for highly polar and electrolyte components
Keywords:
Azeotrope ; Entrainer ; Residue Curve Map ; Extractive Distillation Method ; Salt Effect

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