Investigation about energy-saving for the isobutyl acetate synthesis in a reactive divided-wall column via vapor recompression heat pump

Chen, Lijuan; Ye, Qing; Feng, Shenyao; Zhang, Haoxiang; Wang, Naigen; Cen, Hao; Fan, Yufeng

doi:10.1016/j.cep.2019.107783

Cited by 17 publications

(2 citation statements)

References 16 publications

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“…Currently, there are numerous studies on DWC, including its design, optimization, and control, and it has been widely used in industrial applications. − The reactive dividing wall column results from the further coupling of the reactive distillation and the dividing wall column. It has both advantages and has been widely studied by scholars. − However, due to the lack of experimental support, it has not yet been industrially applied . Although the boiling point order of the solketal synthesis system is theoretically unfavorable for the reactive distillation process since acetone and glycerol are the lightest and heaviest substances as reactants, our previous research successfully realized the process of reactive distillation for the synthesis of solketal in a pilot plant using seepage catalytic packing internal, and the inspiring results illustrate the feasibility of the synthesis process in reactive distillation.…”

Section: Introductionmentioning

confidence: 98%

Experimental Investigation, Process Design, and Optimization Analysis on the Production of Solketal in the Reactive Dividing Wall Column

Liu

Cong

et al. 2021

Ind. Eng. Chem. Res.

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This paper aims at intensifying the synthesis process of solketal by the reactive dividing wall column (RDWC) through experiments and simulation optimization and proposes a high-efficiency production process of solketal. A lab-scale RDWC was set up to verify the feasibility of synthesizing solketal in the RDWC. The effects of different operating parameters, such as reflux ratio, liquid split ratio, molar ratio of acetone to glycerol, feeding method, and the mass flow rate of side stream, on the experimental process have also been demonstrated and analyzed. Furthermore, an equilibrium-stage model developed by Aspen Plus and verified through comparison with experiments was used for the following simulation to optimize and analyze the solketal synthesis process. The response surface methodology (RSM) was employed to optimize the multiobjective problem in RDWC. As a result, a novel competitive solketal synthesis process with an upper partition position RDWC was put forward, which could obtain 99.78% conversion and 99.22 wt % solketal product purity at a 2:1 molar ratio of acetone to glycerol and had a lower energy consumption per unit mass product of 2509.2 J·g–1 compared with other processes. The achievements of this research provide a new way to produce solketal and a significant guideline for the industrial applications of solketal synthesis in the reactive dividing wall column.

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Section: Introductionmentioning

confidence: 98%

Experimental Investigation, Process Design, and Optimization Analysis on the Production of Solketal in the Reactive Dividing Wall Column

Liu

Cong

et al. 2021

Ind. Eng. Chem. Res.

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“…Thus, several researches have been proposed about optimization of heat pump distillation coupled heat exchange network system (MVRHP‐HEN). For example, Yang et al 9 and Chen et al 10 optimized the separation process of industrial wastewater, and the results show that the MVRHP‐HEN technology has good energy saving and emission reduction effect. Wang et al 11 proposed a new type of heat pump distillation structure, by adding a preheater to the compressor to avoid the liquid in the compressor, and the heat exchanger in the system was integrated and optimized.…”

Section: Introductionmentioning

confidence: 99%

Multi‐objective optimization and dynamic control of heat exchanger network for heat pump distillation of acetic acid/acetic anhydride binary system

Ming

Fan

2022

Asia-Pacific J Chem Eng

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In this paper, the heat pump distillation coupled heat exchange network system (MVRHP‐HEN) for acetic acid/acetic anhydride separation is optimized with the minimum total annual cost (TAC) and CO2 emissions as objective functions, meanwhile, the optimized process is simulated dynamically. Firstly, we proposed two optimization schemes: (a) the single objective and multi‐objective optimizations of the MVRHP system over the acetic acid separation column are firstly carried out and then constructed the heat exchange network, namely, MVRHP‐HEN‐1; (b) the heat exchange network is first constructed and then the single objective and multi‐objective optimization of MVRHP‐HEN is carried out, that is, MVRHP‐HEN‐2. The results show that MVRHP‐HEN‐2 obtains lower TAC and CO2 emissions compared with MVRHP‐HEN and MVRHP‐HEN‐1 and has better economic and environmental benefits. Then, the two‐point temperature control structure is built for the dynamic simulation of the optimized separation process. The results show that the proposed control structure has a strong anti‐interference ability. The research is expected to provide guidance for the development and design of advanced heat pump distillation technology.

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Optimal design of reduced vapor transfer dividing wall structures with and without heat integration

Duanmu,

Sorensen

2024

AIChE Journal

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A dividing wall column (DWC) is a prime example of process intensification, whereby significant energy and cost savings can be achieved for some systems compared to operation in conventional design of two columns in series. It has been theorized that the vapor and liquid thermal coupling streams in the DWC could be replaced by liquid‐only transfer streams, making the DWC unit less complex. The ultimate structure is the liquid‐liquid (LL) structure with all thermal coupling streams replaced and a dividing wall extending from the top to the bottom. This article compares the separation and economic performances of the regular DWC and the LL structure, and further investigates the benefits of heat‐integrated alternatives of both (combined condenser and reboiler, double‐effect, vapor recompression assisted). Optimization uncovered that vapor recompression assisted structures exhibit substantial energy savings and lowered total annualized cost but that the savings depend on electricity and utility costs.

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Investigation about energy-saving for the isobutyl acetate synthesis in a reactive divided-wall column via vapor recompression heat pump

Cited by 17 publications

References 16 publications

Experimental Investigation, Process Design, and Optimization Analysis on the Production of Solketal in the Reactive Dividing Wall Column

Experimental Investigation, Process Design, and Optimization Analysis on the Production of Solketal in the Reactive Dividing Wall Column

Multi‐objective optimization and dynamic control of heat exchanger network for heat pump distillation of acetic acid/acetic anhydride binary system

Optimal design of reduced vapor transfer dividing wall structures with and without heat integration

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