Heat integration and dynamic control for separating the ternary azeotrope of butanone/isopropanol/n-heptane via pressure-swing distillation

Zhang, Fangkun; Sun, Defeng; Li, Yanan; Shan, Baoming; Ma, Yixin; Wang, Yinglong; Li, Xin; Zhu, Zhaoyou

doi:10.1016/j.cep.2021.108657

Cited by 33 publications

(12 citation statements)

References 28 publications

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“…The optimal solution needs to balance operation cost and equipment cost. Compared with previous data, 26 NHIPSD-B1 and NHIPSD-B2 can reduce the TAC by 27.20% and 29.10%, respectively. The technological process and parameters of PSD-A2 are re-optimized based on the PSD-A1, including process parameters such as the number of stages, reflux ratios, column diameter and feed positions.…”

Section: Wileyonlinelibrarycom/jctbcontrasting

confidence: 71%

“…The optimized NHIPSD-A2 process can greatly reduce the TAC by 31.11% by optimization compared with the NHIPSD-A1, as studied in the reference. 26 The PHIPSD and FHIPSD have been designed for these two separation sequences. The results demonstrated that the economically optimal process is FHIPSD-A2, which can reduce TAC by 40.96%.…”

Section: Discussionmentioning

confidence: 99%

“…In this work, the PSD process for separating the ternary mixture of MEK/ n ‐heptane/IPA was simulated using the NRTL model in Aspen Plus software. The feed flowrate was set to 1000 kg h −1 , and the mixture consists of 80 wt% MEK, 10 wt% n ‐heptane and 10 wt% IPA, as adopted previously 26 . The purity of the MEK, n ‐heptane and IPA were required to be ≥99.9 wt%.…”

Section: Process Flowsheet Optimizationmentioning

confidence: 99%

“…Isothermal VLE data for the MEK/ n‐ heptane binary system were surveyed by Liebergesell et al 25 . Zhang et al 26 . analyzed VLE data of the MEK/ n ‐heptane/IPA ternary mixture and compared several thermodynamic models.…”

Section: Introductionmentioning

confidence: 99%

“…Results indicated that the mutual diffusion coefficient increases with the increasing temperature. Isothermal VLE data for the MEK/n-heptane binary system were surveyed by Liebergesell et al 25 Zhang et al 26 analyzed VLE data of the MEK/n-heptane/IPA ternary mixture and compared several thermodynamic models. The NRTL model was found to be able to more accurately perform the VLLE of the ternary mixture.…”

Section: Introductionmentioning

confidence: 99%

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Economic optimization and dynamic control of pressure‐swing distillation for separating the ternary azeotrope of butanone/n‐heptane/isopropanol

Sun

Zhang

et al. 2022

J of Chemical Tech & Biotech

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BACKGROUND Economic optimization and dynamic control of the separation process for recovering the ternary mixture of butanone (MEK)/n‐heptane/isopropanol (IPA) from industrial wastewater is a significant topic. In this work, the optimal pressure‐swing distillation (PSD) sequence, heat integration and dynamic control for separating MEK/n‐heptane/IPA were investigated systematically. The optimal separation sequence was determined by combining the minimum total annual cost (TAC) with the residual curves map (RCM). Pressure‐swing distillation with non‐heat integration, partial heat integration or full heat integration was compared in terms of TAC. Dynamic control schemes were designed for optimal processes of two separation sequences with and without heat integration. RESULTS The results demonstrate that the TAC of optimal PSD with non‐heat integration process can be reduced by 31.11%, whereas the TAC of optimal partial heat integration and full heat integration schemes can be reduced by 39.73% and 40.96%, respectively. The dynamic performance of all control schemes that can resist ±20% feed flow disturbances and composition disturbances are compared with the integral of squared error. CONCLUSION It is demonstrated that PSD with full integration process (FHIPSD) for separating MEK/n‐heptane/IPA has optimal economic performance, whereas PSD with non‐heat integration process (NTIPSD) has the optimal dynamic performance and robust stability. This work provides a significant reference for industrial separation of MEK/n‐heptane/IPA. © 2022 Society of Chemical Industry (SCI).

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Section: Wileyonlinelibrarycom/jctbcontrasting

confidence: 71%

Section: Discussionmentioning

confidence: 99%

Section: Process Flowsheet Optimizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Economic optimization and dynamic control of pressure‐swing distillation for separating the ternary azeotrope of butanone/n‐heptane/isopropanol

Sun

Zhang

et al. 2022

J of Chemical Tech & Biotech

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Evaluation and control of energy‐efficient processes for separating epichlorohydrin‐oriented quaternary system

Qi,

Yang,

Zhang

et al. 2024

J of Chemical Tech & Biotech

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BACKGROUNDThe direct epoxidation of allyl chloride is a clean and efficient synthesis method for producing Epichlorohydrin (ECH), which is a crucial organic intermediate widely used in the fields of renewable energy and aerospace. However, the presence of multiple azeotropes in the synthesized product using this method complicates the separation process and results in high energy consumption. To efficiently separate high‐purity ECH, this paper investigates and analyzes three separation schemes based on the phase‐equilibrium analysis, including hybrid extractive distillation (HED), pressure swing distillation (PSD), and three‐column batch distillation (TCBD).RESULTSThe operating parameters of the three separation processes are optimized by the sequential iterative optimization method that the minimum total annual cost (TAC) can reach 493 491 $/y. The thermal integration method is used for process energy‐saving optimization, and the TAC can be further reduced by 6.9%. In addition, a comprehensive evaluation based on economic, energy, environmental, and exergy analysis is conducted, and reveals that TCBD process with thermal integration is optimal. A control structure is designed for the TCBD process to enhance its robustness that the purity of ECH remains above 99.9 mol% under ±10% disturbances in feed flowrate and composition.CONCLUSIONSCompared with HED and PSD processes, the TCBD process has better economic and environmental benefits, and its control structure can effectively resist disturbances. It is reasonable to believe that the TCBD process can be an excellent solution for the industrial production of ECH.This article is protected by copyright. All rights reserved.

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Product composition control based on backpropagation neural network in pressure-swing distillation processes

Sun

Zhang

et al. 2023

Chemical Engineering and Processing - Process Intensification

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Heat integration and dynamic control for separating the ternary azeotrope of butanone/isopropanol/n-heptane via pressure-swing distillation

Cited by 33 publications

References 28 publications

Economic optimization and dynamic control of pressure‐swing distillation for separating the ternary azeotrope of butanone/n‐heptane/isopropanol

Economic optimization and dynamic control of pressure‐swing distillation for separating the ternary azeotrope of butanone/n‐heptane/isopropanol

Evaluation and control of energy‐efficient processes for separating epichlorohydrin‐oriented quaternary system

Product composition control based on backpropagation neural network in pressure-swing distillation processes

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