Effect of pressure on heat duties in pressure swing distillation: A simulation study

Acetone-methanol mixture is a typical minimum-boiling azeotropic system which cannot be separated in its constituent liquids using conventional techniques. At the same time, pressure swing distillation (PSD) is a separation technique which does not put the requirement of an additional third componen...

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Bibliographic Details
Main Authors: Koteswari M., D. S. V. J. P., Kumar, Vivek
Format: Conference Proceeding
Language:English
Subjects:
Acetone
Azeotropes
Boiling
Distillation
Energy consumption
Methanol
Pressure effects
Separation
Simulation
Software
Thermodynamic models
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Summary:Acetone-methanol mixture is a typical minimum-boiling azeotropic system which cannot be separated in its constituent liquids using conventional techniques. At the same time, pressure swing distillation (PSD) is a separation technique which does not put the requirement of an additional third component to drive the separation process. The current work is based on the application of PSD for the minimum boiling azeotropes. The current study presents a theoretical investigation done over pressure sensitivity for the PSD of acetone-methanol mixture. Various thermodynamic models have been used. The azeotrope composition shift showed a direct effect on reboiler duty. This study also presented the optimum best operating pressure which targeted total energy consumption. DWSIM, the open source simulation software, has been used for all the simulations and it matched well with the results obtained using commercial software PRO II. The study presents the relation between high pressure column pressure and heat duty. It also discusses the possibility of heat integration and capital cost to decide the range of operating pressure.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0068631