Reactive dividing wall column for hydrolysis of methyl acetate: Design and control

Li, Lumin; Sun, Lanyi; Yang, Delian; Wei, Zhong; Zhu, Yi; Tian, Yuanyu

doi:10.1016/j.cjche.2016.05.023

Cited by 23 publications

(12 citation statements)

References 29 publications

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“…In addition to the RDWC arrangement proposed for formic acid production, a similar intensified process has been developed and simulated for n-propyl acetate synthesis, 7 hydrolysis of methyl acetate, 8 diethyl carbonate synthesis, 9 transesterification of 1-hexanol and n-butyl acetate, 10 and toluene diisocyanate synthesis. 11 Despite the various advantages mentioned in the literature, the obstacle hindering the application of RDWC is that the uncontrollable vapor split increases the difficulty for optimal operation.…”

Section: Introductionmentioning

confidence: 99%

Optimal Design, Proportional-Integral, and Model Predictive Control of Intensified Process for Formic Acid Production II: Reactive Dividing Wall Column without Uncontrollable Vapor Split

Han

Yang

et al. 2021

Ind. Eng. Chem. Res.

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A reactive dividing wall column (RDWC) integrates reactive distillation and multiproduct separation together, leading to the realization of process intensification. However, the reluctance to use it is due to the uncontrollable vapor split, which is self-regulated according to the flow resistance on each side of the partition wall. For some cases, the pressure of reaction and multicomponent separation is different, which results in an energy penalty if we directly integrate these units together, for example, formic acid (FA) production through methyl formate (MF) as presented in the part I of this series (Ind. Eng. Chem. Res. 2020, 59, 22215). To tackle these obstacles, a new reactive dividing wall column without the uncontrollable vapor split (NV-RDWC) by converting the bidirectional vapor–liquid thermal coupling to liquid-only transfer stream is proposed in this work. Optimization was first carried out by coupling the genetic algorithm (GA) and rigorous simulation. On the basis of the optimal solution, a detailed comparison was conducted between the conventional reactive distillation process, RDWC, and NV-RDWC, and the results show the superiority of NV-RDWC. Then two multiloop proportional-integral (PI) control structures and a model predictive control (MPC) for NV-RDWC were developed, respectively, to investigate their control performance. The dynamic response in the face of feed disturbance shows that MPC could give superior control performance for this complex coupled process.

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Section: Introductionmentioning

confidence: 99%

Optimal Design, Proportional-Integral, and Model Predictive Control of Intensified Process for Formic Acid Production II: Reactive Dividing Wall Column without Uncontrollable Vapor Split

Han

Yang

et al. 2021

Ind. Eng. Chem. Res.

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show abstract

“…Also, Ye et al 18 developed a multiloop proportional− integral (PI) control structure of RDWC for n-propyl propionate production, which demonstrates that overshoot and settling time could be significantly reduced by employing a control strategy with pressure and temperature cascade control of the common stripping section. The multiloop PI control structures were also adopted for various intensified processes such as hydrolysis of methyl acetate by RDWC, 19 RDWC coupled with a heat pump for n-propyl acetate synthesis, 9 a heat-integrated RD process for dimethyl carbonate production, 20 RDWC for butyl acetate synthesis through esterification, 21 n-hexyl acetate and 1-butanol transesterification, 22 and diethyl carbonate synthesis. 23 According to the dynamic response, the multiloop PI control schemes could tackle persistent feed disturbance to some extent.…”

Section: Introductionmentioning

confidence: 99%

Optimal Design, Proportional–Integral Control, and Model Predictive Control of Intensified Process for Formic Acid Production. 1. Reactive Distillation and Reactive Dividing Wall Column

Yang

Han

et al. 2020

Ind. Eng. Chem. Res.

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Formic acid production through methyl formate hydrolysis has been shown to be energy and capital cost intensive, and its performance could be significantly promoted by process intensification. However, integration of reaction and separation exhibits a complex nonlinear behavior, which requires corresponding optimization and control to be effectively addressed before further industrial implementation. In the present work, optimization was first performed for a conventional reactive distillation (RD) process and reactive dividing wall column (RDWC) by coupling genetic algorithm and rigorous simulations, in which a user-defined model was incorporated to take kinetics into account. Although the results demonstrate that RDWC is inferior to RD in terms of economic criteria, it provides the basis for proposing new easy-to-operate configurations in the subsequent part 2 of this series. Then multiloop proportional–integral (PI) control structures and linear model predictive control (MPC) schemes were designed for the conventional RD process and RDWC, respectively. The performances of two control structures were compared subject to feed disturbance, by using quantitative indexes such as oscillation, settling time, overshoot, and integral of the squared error (ISE). The dynamic response validates that MPC outperforms classical multiloop control schemes and could tackle the excessive overshoot deficiency in PI control for both the conventional RD process and RDWC.

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“…While control concepts are available for reactive distillation [13,14] and non-reactive dividingwall columns [2,15,16], only little information is existing on the control of RDWCs. Most of the published works on RDWC control investigate the closed-loop behavior with mathematical models built in Aspen Dynamics [17][18][19][20][21][22][23][24]. Experimental data on the column's dynamic behavior are still scarce.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Decentralized Process Control for Reactive Dividing‐Wall Columns

Egger

Fieg

2020

Chem Eng & Technol

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The reactive dividing-wall column (RDWC) presents a highly integrated process that enables significant reductions in investment costs and energy consumption. However, the high degree of integration of this apparatus causes numerous interactions between kinetics, vapor-liquid equilibrium, and mass transfer. To ensure a reliable operation of the RDWC, suitable control schemes need to be developed and experimentally validated. A decentralized control scheme for the RDWC is presented and for the first time experimentally investigated on an RDWC pilot plant. A comparison of experimental and simulated data is carried out and shows good agreement.The transesterification of n-butyl acetate with 1-hexanol (Eq. (1)), catalyzed by the immobilized enzyme Novozym 435, is selected as reference system. A detailed investigation of the

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Reactive dividing wall column for hydrolysis of methyl acetate: Design and control

Cited by 23 publications

References 29 publications

Optimal Design, Proportional-Integral, and Model Predictive Control of Intensified Process for Formic Acid Production II: Reactive Dividing Wall Column without Uncontrollable Vapor Split

Optimal Design, Proportional-Integral, and Model Predictive Control of Intensified Process for Formic Acid Production II: Reactive Dividing Wall Column without Uncontrollable Vapor Split

Optimal Design, Proportional–Integral Control, and Model Predictive Control of Intensified Process for Formic Acid Production. 1. Reactive Distillation and Reactive Dividing Wall Column

Experimental Investigation of Decentralized Process Control for Reactive Dividing‐Wall Columns

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