Novel control strategy of intensified hybrid reactive-extractive distillation process for the separation of water-containing ternary mixtures

Wu, Tsai-Wei; Chien, I‐Lung

doi:10.1016/j.seppur.2022.121159

Cited by 20 publications

(3 citation statements)

References 36 publications

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“…It is also essential to ensure that the TEG produced from side reactions does not form azeotropes with any mixture component, which can complicate the separation process. Further research can also explore the control performance or the flexibility of RED considering side reactions, as the existing studies have not addressed this aspect. , Another recommendation for future work is to investigate the impact of varying the EO to water ratio on the performance of RED. While this study focused on a specific approach that ensures complete water removal and results in a solvent primarily composed of TEG, it would be interesting to explore the effects of different EO flowrates.…”

Section: Discussionmentioning

confidence: 99%

Design and Optimization of Hybrid Reactive-Extractive Distillation for Ternary Azeotropic Separation: A Case Considering the Effect of Side Reactions

Kong

Yang

Tsai

et al. 2023

Ind. Eng. Chem. Res.

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Hybrid reactive-extractive distillation (RED) has been popular for separating azeotropic mixtures, as it combines the chemical reaction and physical azeotropic separation in a single unit operation. At least 18 studies have been published between 2020 and 2023, all of them relying on the hydration of ethylene oxide (EO) to form ethylene glycol (EG), without considering the potential side reactions that could impact the RED performance. This study shows one possible scenario where the formation of higher-level glycols during side reactions has led to significant increases in the total energy consumption and the total annual cost (TAC) by about 839 and 154%, respectively. These increases were due to the larger column size, low operating pressure, and more expensive cooling refrigerant. Hence, the performance of RED may not be as favorable as previously reported, and side reactions can significantly reduce its effectiveness. Future RED studies must consider the potential side reactions.

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Section: Discussionmentioning

confidence: 99%

Design and Optimization of Hybrid Reactive-Extractive Distillation for Ternary Azeotropic Separation: A Case Considering the Effect of Side Reactions

Kong

Yang

Tsai

et al. 2023

Ind. Eng. Chem. Res.

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“…Although the steady state design for the RED first appeared in 2020, it was not until recently (i.e. 2022) that Chien's group analysed the control performance of the RED by using only the temperature controller to handle various feed composition and throughput disturbances (Wu and Chien, 2022). Here, it is worth noting that the obstacle for developing a robust control structure for the RED lies in the complicated interaction between the reaction and the vapour-liquid equilibrium in the REDC.…”

Section: Control Performance Of Reactiveextractive Distillationmentioning

confidence: 99%

“…Further, the simultaneous control of the EO flowrate to avoid this highly flammable substance from escaping to the environment while maintaining the water impurity in the products stream is a challenging task. In the work of Wu and Chien (2022), several different control strategies were investigated, i.e. dual temperature control, triple-point temperature control, temperature-invariant control, and temperature-difference control.…”

Section: Control Performance Of Reactiveextractive Distillationmentioning

confidence: 99%

Recent progress on hybrid reactive-extractive distillation for azeotropic separation: A short review

2022

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The reactive-extractive distillation (RED) has the advantages of combining the beneficial features of both reaction and separation processes. Relative to the conventional reactive or extractive distillation-based processes, the RED is also less energy intensive as it relies on the reaction heat produced for the subsequent separation process. Therefore, the application of RED for ternary azeotropic separation has become the subject of popular interest, as evident by the increasing number of publications since 2020. This review paper is the first that puts together, in a chronological manner, all the existing studies on the RED to date, starting from the initial three column reactive-extractive distillation (TCRED) to the most recent dividing wall reactive-extractive distillation (DW-RED), for ternary azeotropic separation, so that the rapid progress in this area is summarised and any existing gaps in these studies become easier to identify for future work. The last part of this review provides three potential areas for future work, i.e. analysis of the sustainability of RED, combination of different process intensification strategies to improve the energy efficiency and separation performance, and further exploration on the control studies for the RED.

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Control of Hybrid Reactive–Extractive Distillation Systems for Ternary Azeotropic Mixtures

Kong,

Lee

2024

Control and Safety Analysis of Intensified Chemical Processes

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Novel control strategy of intensified hybrid reactive-extractive distillation process for the separation of water-containing ternary mixtures

Cited by 20 publications

References 36 publications

Design and Optimization of Hybrid Reactive-Extractive Distillation for Ternary Azeotropic Separation: A Case Considering the Effect of Side Reactions

Design and Optimization of Hybrid Reactive-Extractive Distillation for Ternary Azeotropic Separation: A Case Considering the Effect of Side Reactions

Recent progress on hybrid reactive-extractive distillation for azeotropic separation: A short review

Control of Hybrid Reactive–Extractive Distillation Systems for Ternary Azeotropic Mixtures

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