Separating an azeotropic mixture of toluene and ethanol via heat integration pressure swing distillation

Zhu, Zhaoyou; Wang, Lili; Ma, Yixin; Wang, Wanling; Wang, Yinglong

doi:10.1016/j.compchemeng.2015.02.016

Cited by 108 publications

(45 citation statements)

References 27 publications

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“…(Chemical Engineering Plant Cost Index). Other additional costs such as pumps, valves and pipelines may be ignored for calculations because their costs are much lower than those described above and would not significantly impact the TAC (Zhu et al, 2015). The economic assessments and the sizing relations were provided by Douglas (1988) and may be written as follows.…”

Section: Economic Analysismentioning

confidence: 99%

“…The separation of azeotropic mixtures is of great industrial interest and numerous special distillation processes have been developed and optimized, including extractive distillation (Kiss and Suszwalak, 2012;Luo et al, 2014;Muñoz et al, 2006;Quijada-Maldonado et al, 2014), azeotropic distillation (Kunnakorn et al, 2013;Luyben, 2008a;Pla-Franco et al, 2014), membrane distillation (Tsuyumoto et al, 1997) and pressure-swing distillation (PSD) (Li et al, 2015;Luo et al, 2014;Luyben, 2008b;Zhu et al, 2015). There are also studies showing the possibility of using a combination of different configurations to obtain an optimal flowsheet.…”

Section: Introductionmentioning

confidence: 99%

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Optimization of Pressure-Swing Distillation for Anhydrous Ethanol Purification by the Simulated Annealing Algorithm

Battisti

Claumann

Marangoni

et al. 2019

Braz. J. Chem. Eng.

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The present study addresses the novel application of the simulated annealing algorithm (SAA) to optimize the pressure-swing distillation (PSD) process for anhydrous ethanol purification. Three different softwares (Aspen Plus ® , Excel ® and Matlab ®) were integrated to simultaneously optimize seven design and operational variables. The configuration with the best TAC represented a 40.2% saving per year in comparison to the non-optimized PSD. Such reduction was achieved by using the higher acceptance probability and the slower temperature decrement. This saving is mainly related to operational cost reductions, a fact that evidences the viability of using the herein described optimization methodology to improve the PSD design.

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Section: Economic Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimization of Pressure-Swing Distillation for Anhydrous Ethanol Purification by the Simulated Annealing Algorithm

Battisti

Claumann

Marangoni

et al. 2019

Braz. J. Chem. Eng.

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show abstract

“…Level control structures (LCS) have been studied in batch distillation (Fanaei et al, 2012;Luyben, 2015) and continuous distillation processes, such as pressure swing distillation (Wei et al, 2013;Zhu et al, 2015), reactive distillation (Xu et al, 2014), and extractive distillation (Wang et al, 2015). In this paper, three level controllers named LCtop, LCbase, and LCmid, a temperature controller called TCLS and a pressure controller called PC were added to stabilize the separation system.…”

Section: Brazilian Journal Of Chemical Engineeringmentioning

confidence: 99%

Operational Design and Improvement of Conventional Batch Distillation and Middle-Vessel Batch Distillation

Zhao

Wang

et al. 2018

Braz. J. Chem. Eng.

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Conventional batch distillation and middle-vessel batch distillation were studied for the separation of the ternary system of cyclohexane/n-heptane/toluene, which has low relative volatilities. The modified variable and constant reflux operations were applied in the conventional batch distillation. Two control structures were used: one of which was referred to as the composition control structure with a modified level-set point, and the other was referred to as the flowrate-limiting control structure. Thus, the middle-vessel batch distillation was able to simultaneously separate the components of the ternary mixture. Comparing the two control structures showed that the flowrate-limiting control structure was better than the composition control structure with a modified level-set point in terms of their applicability. Disturbances were introduced to assess the controllability of the flowrate-limiting control structure. The dynamic responses demonstrated that the control structure performed well. The results showed that the modified conventional batch distillation and middle-vessel batch distillation increased the purity of the separated components compared to previous studies.

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“…The optimization of double column PSD via the sequential iterative optimization procedure was studied by researchers [39,[51][52][53][54]. There is no literature on the optimization procedure of TCPSD because a lot of parameters need to be determined.…”

Section: Optimizationmentioning

confidence: 99%

Separation of acetonitrile/methanol/benzene ternary azeotrope via triple column pressure-swing distillation

Zhu

Liu

et al. 2016

Separation and Purification Technology

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130

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Separating an azeotropic mixture of toluene and ethanol via heat integration pressure swing distillation

Cited by 108 publications

References 27 publications

Optimization of Pressure-Swing Distillation for Anhydrous Ethanol Purification by the Simulated Annealing Algorithm

Optimization of Pressure-Swing Distillation for Anhydrous Ethanol Purification by the Simulated Annealing Algorithm

Operational Design and Improvement of Conventional Batch Distillation and Middle-Vessel Batch Distillation

Separation of acetonitrile/methanol/benzene ternary azeotrope via triple column pressure-swing distillation

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