Optimization and control of energy saving side-stream extractive distillation with heat integration for separating ethyl acetate-ethanol azeotrope

Shi, Tao; Chun, Wei; Yang, Ao; Yang, Su; Jin, Saimeng; Ren, Jingzheng; Shen, Weifeng

doi:10.1016/j.ces.2019.115373

Cited by 95 publications

(28 citation statements)

References 57 publications

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“…Matlab can be employed for optimization calculations, as presented by Christopher [20] or Feng [21]. Most studies focus on economic or coupled economic-environmental optimization, in line with the current approach to industrial processes optimization described by Dai [22] and Sharon [23], selecting total annual cost (TAC), annual operation cost (AOC) and similar factors as economic indicators [24][25][26][27], while CO 2 emissions serve as environmental performance indicator [28][29][30]. Other issues such as material efficiency described by Parmar [31], thermal efficiency used by Feng [21], or process control designed by Shi [30] are not often included in the optimization scheme.…”

Section: Current Trends Of Heat Pump Application In Separation Processesmentioning

confidence: 99%

“…The inclusion of quantitative risk assessment into multi-objective optimization of industrial processes is a very recent topic (Ifaei [32]), and the effect of heat pump integration into a process is not well explored. [30] The main goal of this paper is to assess the possibility of including a heat pump (MVRHP) in selected ethyl acetate production processes as well as to assess the benefits of such integration. Multi-objective (energy-economics-safety) assessment of primary processes was performed in our previous work [5] and integration of a heat pump is expected to lead to process intensification, significant energy savings and utility cost reduction.…”

Section: Current Trends Of Heat Pump Application In Separation Processesmentioning

confidence: 99%

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Multi-Objective Assessment of Heat Pump-Assisted Ethyl Acetate Production

et al. 2021

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Multi-objective (energy–economic–safety) assessment of ethyl acetate production involving a heat pump is presented in this paper. The heat pump is designed to intensify ethyl acetate separation and to reduce the total operating cost. Two ethyl acetate production pathways are upgraded using a heat pump, conventional process and reactive distillation column with a separation unit. Detailed process models including the heat pump environment have been compiled and optimized in the Aspen Plus software. Both benefits and drawbacks of including the heat pump in the processes are evaluated using three different points of view: process energy, economics, and safety. As a result, using a heat pump is highly recommended in both conventional process and reactive distillation column with a separation unit. As a higher level of process integration is achieved using a heat pump, economic aspects are improved; however, safety aspects deteriorate. The final decision on the suitability of using a heat pump depends on whether it is proposed for an existing plant, or a completely new plant is designed. In a new plant, the concept of a thermally coupled process (reactive distillation column with a stripper column) has been proven to be the most promising.

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Section: Current Trends Of Heat Pump Application In Separation Processesmentioning

confidence: 99%

Section: Current Trends Of Heat Pump Application In Separation Processesmentioning

confidence: 99%

Multi-Objective Assessment of Heat Pump-Assisted Ethyl Acetate Production

et al. 2021

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“…The results showed that, compared with traditional extractive distillation, the VRHP-ED process reduced the total annual cost (TAC) by 7.07%, and improved thermal efficiency from 8.76% to 9.24%. Shi et al 14 proposed side stream extractive distillation with heat integration (EDSH) to separate EAC and ethanol. A multi-objective genetic algorithm was used to optimize side stream extractive distillation (EDS) and EDSH.…”

Section: Introductionmentioning

confidence: 99%

Dynamic control of heat pump assisted extractive distillation process for separation of ethyl acetate/isopropanol/water mixture

Shan

Niu

Meng

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND: Controlling the behavior of processes for the recovery of ethyl acetate and isopropanol from industrial wastewater is a hot topic. In this work, dynamic control structures of the extractive distillation process and heat pump combined with feeding preheating extractive distillation process are researched. The control performance of the proposed control structures is tested by adding feed flow and composition disturbance. In these two processes, two-point temperature control structure is first used. RESULTS:The results show that this structure can maintain product purity within a reasonable range under disturbance. Furthermore, the composition controller is used to improve control performance.CONCLUSION: The improved structure can effectively meet the requirements of product purity. The heat pump combined with feeding preheating extractive distillation process can use the same control structure as the extraction process and show good controllability. This study has a certain guiding value for the research of chemical dynamic control.

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“…Ma et al 25 investigated the control of an energy-saving SSED sequence with different disturbance conditions. Shi et al 26 investigated a multiobjective optimization and control strategy for energy saving SSED with heat integration to separate the binary azeotropic mixture (ethyl acetate + ethanol). Gutiérrez et al 27 developed an extractive dividing wall column (EDWC) process to separate the binary azeotropes (acetone + methanol), (tetrahydrofuran + water) and (n-heptane + toluene).…”

Section: Introductionmentioning

confidence: 99%

“…investigated the control of an energy‐saving SSED sequence with different disturbance conditions. Shi et al . investigated a multi‐objective optimization and control strategy for energy saving SSED with heat integration to separate the binary azeotropic mixture (ethyl acetate + ethanol).…”

Section: Introductionmentioning

confidence: 99%

Thermal coupled extractive distillation sequences with three entrainers for the separation of azeotrope isopropyl alcohol + diisopropyl ether

Zhang

Gao

et al. 2020

J of Chemical Tech & Biotech

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BACKGROUND During the synthesis of isopropyl alcohol (IPA) by hydration of propylene, diisopropyl ether (DIPE) is usually produced as a by‐product. Because IPA and DIPE can form a binary homogeneous azeotrope with the minimum boiling temperature at atmospheric pressure, it is difficult to separate the binary mixture by simple distillation. RESULT For separating the azeotrope IPA + DIPE, side‐stream extractive distillation column (SSED) and extractive dividing wall column (EDWC) processes with three entrainers [2‐methoxyethanol (2‐MEA), 2‐ethoxyethanol and propylene glycol ethyl ether (PGEE)] were simulated and optimized based on the minimal total annual cost (TAC). Moreover, CO2 emissions of the six sequences were calculated and the impact on the environment evaluated. CONCLUSIONS The sequence of SSED with PGEE as entrainer can reduce TAC by ≤34.48%, but EDWC with PGEE can offer TAC reduction of ≤52.46%. The results demonstrate that the EDWC sequence with PGEE as entrainer is favourable for separating the binary azeotrope IPA + DIPE. © 2020 Society of Chemical Industry

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Optimization and control of energy saving side-stream extractive distillation with heat integration for separating ethyl acetate-ethanol azeotrope

Cited by 95 publications

References 57 publications

Multi-Objective Assessment of Heat Pump-Assisted Ethyl Acetate Production

Multi-Objective Assessment of Heat Pump-Assisted Ethyl Acetate Production

Dynamic control of heat pump assisted extractive distillation process for separation of ethyl acetate/isopropanol/water mixture

Thermal coupled extractive distillation sequences with three entrainers for the separation of azeotrope isopropyl alcohol + diisopropyl ether

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