A simulation study on selection of optimized process for azeotropic separation of methanol and benzene: Internal heat integration and economic analysis
- 32 Downloads
This work provides an insight into the separation of azeotropic mixtures by using two different techniques: pressure swing distillation and extractive distillation. Both methods are used to separate an azeotropic mixture of methanol and benzene. This mixture exhibits a minimum boiling azeotrope at temperature 57.97 °C and pressure 1 bar with mole fractions of 0.61 and 0.39 for methanol and benzene, respectively. However, the azeotropic point in methanol and benzene mixture is pressure sensitive, which can be shifted by changing pressure with a process called pressure swing distillation. Extractive distillation with suitable solvent is another method to separate such kind of mixture. Both methods are rigorously simulated and optimized for minimum heat duties. Internal heat integration is applied too for increasing energy efficiency. New optimization techniques are carried out with process simulator Aspen HYSYS V8.4 and results reveal the best method for separation of methanol and benzene azeotropic mixture.
KeywordsAzeotrope Pressure Swing Distillation Extractive Distillation Internal Heat Integration Solvent
Unable to display preview. Download preview PDF.
- 10.M. F. Doherty and M. F. Malone, Conceptual design of distillation systems, McGraw-Hill Science/Engineering/Math (2001).Google Scholar
- 26.R. M and W. Wa, Ind. Eng. Chem., 31, 2079 (1939).Google Scholar
- 28.W. L. Luyben and I.-L. Chien, Design and control of distillation systems for separating azeotropes, John Wiley & Sons (2011).Google Scholar
- 34.Z. Zhang, L. Liu, W. Li and L. Chen, CIESC J., 9, 023 (2011).Google Scholar
- 38.C. Black and D. Ditsler, Dehydration of aqueous ethanol mixtures by extractive distillation (1972).Google Scholar
- 46.M.B. D'amore, L. E. Manzer, E. S. Miller Jr. and J.P. Knapp, Process for making isooctenes from dry 1-butanol, Google Patents (2015).Google Scholar
- 47.F. Michael and P. Jeffrey, Distillation, Azeotropic and Extractive, Ruthven, DM (Ed.) (1997).Google Scholar