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Open AccessArticle

Process Simulation of the Separation of Aqueous Acetonitrile Solution by Pressure Swing Distillation

1
College of Chemistry and Materials Engineering, Liupanshui Normal University, Liupanshui 553004, China
2
North China Company, China Petroleum Engineering Co., LTD., Renqiu 052100, China
*
Authors to whom correspondence should be addressed.
Processes 2019, 7(7), 409; https://doi.org/10.3390/pr7070409
Received: 24 May 2019 / Revised: 14 June 2019 / Accepted: 27 June 2019 / Published: 1 July 2019
The separation of aqueous acetonitrile solution by pressure swing distillation (PSD) was simulated and optimized through Aspen Plus software. The distillation sequence of the low pressure column (LPC) and high pressure column (HPC) was determined with a phase diagram. The pressures of the two columns were set to 1 and 4 atm, respectively. Total annual cost (TAC) was considered as the objective function, and design variables, such as the tray number, the reflux ratio, and the feeding position, were optimized. The optimum process parameters were obtained. For the reduction of energy consumption, the PSD with full-heat integration was designed. The TAC of this method is lower by 32.39% of that of the PSD without heat integration. Therefore, it is more economical to separate acetonitrile and water mixture by PSD with full-heat integration, which provides technical support for the separation design of such azeotropes. View Full-Text
Keywords: pressure swing distillation; full-heat integration; acetonitrile; water pressure swing distillation; full-heat integration; acetonitrile; water
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MDPI and ACS Style

Li, J.; Wang, K.; Lian, M.; Li, Z.; Du, T. Process Simulation of the Separation of Aqueous Acetonitrile Solution by Pressure Swing Distillation. Processes 2019, 7, 409.

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