Dividing wall columns for heterogeneous azeotropic distillation

Le, Quang-Khoa; Halvorsen, Ivar J.; Pajalić, Oleg; Skogestad, Sigurd

doi:10.1016/j.cherd.2015.03.022

Cited by 75 publications

(47 citation statements)

References 4 publications

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“…Special distillation processes such as azeotropic distillation, pressure‐swing distillation, and extractive distillation are widely used for separating azeotropes. Extractive distillation (ED) can change the relative volatility between the light and heavy components by adding a third component called entrainer and has been widely and deeply studied for separating binary azeotropic mixtures.…”

Section: Introductionmentioning

confidence: 99%

Optimization of the composition of mixed entrainer for economic extractive distillation process in view of the separation of tetrahydrofuran/ethanol/water ternary azeotrope

Zhao

Jia

et al. 2017

J of Chemical Tech & Biotech

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BACKGROUND: There are three binary azeotropes in the tetrahydrofuran/ethanol/water ternary system at atmospheric pressure. Ternary extractive distillation (ED) processes were studied to separate the ternary azeotropic mixture using two single component solvents and a mixed solvent as entrainer.RESULT: Based on the sequential iterative optimization procedure, the minimal total annual costs (TACs) of the ternary extractive distillation process using ethylene glycol (EG), dimethyl sulfoxide (DMSO), and the mixture of DMSO and EG as entrainer were obtained. Compared with two single component entrainers DMSO and EG, the TAC of the extractive distillation process with mixed entrainer (60 mol% DMSO + 40 mol% EG) decreases by 6.55% and 31.88%, respectively. Furthermore, the reboiler heat duties of two extractive distillation columns (EDCs) with mixed entrainer were compared with two single component entrainers. CONCLUSION:The results show that the optimal ED process using mixed entrainer performs better than that using single component entrainers from the perspective of economics. Moreover, there is a tradeoff between the reboiler heat duties of two EDCs, which can be adjusted by changing the entrainer performance in two EDCs. The use of mixed entrainer enhances the flexibility of the tradeoff because it only needs to change the composition of the mixed entrainer.

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Section: Introductionmentioning

confidence: 99%

Optimization of the composition of mixed entrainer for economic extractive distillation process in view of the separation of tetrahydrofuran/ethanol/water ternary azeotrope

Zhao

Jia

et al. 2017

J of Chemical Tech & Biotech

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“…[100] In general, for continuous processes, structured catalytic units are best suited as they can be designed in modular, replaceable F I G U R E 5 Dividing-wall column (DWC) configurations: A, middle; B, top; and C, bottom. Reproduced with permissions from Le et al [97] components that can be substituted with new ones while they are being regenerated. Unstructured catalysts in combination with process-intensifying equipment or methods are easier to integrate when applying PI in the energy domain ( Figure 2).…”

Section: Process Intensification and Catalysismentioning

confidence: 99%

Process intensification connects scales and disciplines towards sustainability

Boffito

Rivas

2020

Can J Chem Eng

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Process intensification (PI) has been established as a cluster of technologies able to produce more with less. While scientists around the globe advocate for new semantics that are increasingly tied to the notion of sustainability, what does the literature data say about PI? A Vosviewer bibliometric map of PI displays it as closely linked to the subjects of design, optimization, gas-to-liquid technologies, mass transfer, catalysis, and kinetics. We analyze the relationship between PI and these subjects while identifying misconceptions about the intensifying potential of some of them, as is the case for process optimization. We provide examples and summarize the recent technological trends for all these cases. Finally, we provide an outlook on the future of PI in which we identify elements that will be key to accelerate the adoption of PI technologies at the commercial scale.

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“…The azeotropic distillation of the next-wall column process has more obvious advantages in energy saving and cost compared with the conventional two-tower process. For the ternary system, Quang-Khoa et al [39] designed a heterogeneous azeotropic distillation scheme for water, acetic acid and organic components using the Petlyuk dividing wall column, and found that compared with the original scheme, the scheme saves energy consumption. 20%.…”

Section: Dividing Wall Column Distillation Technologymentioning

confidence: 99%

Research Progress on Azeotropic Distillation Technology

Guo¹,

Wang²

2019

ACES

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Azeotropic distillation is a special distillation method for separating liquid mixtures, which has better distillation effect and obvious advantages of energy saving and consumption reduction compared with traditional distillation. In this paper, the latest research progress of azeotropic distillation technology in separation, synthesis and energy saving at home and abroad is reviewed. The research progress in separation is reflected in product separation and product purification, and the research progress in energy saving is reflected in heat pump distillation and dividing wall column distillation respectively. Existing studies have shown that azeotropic distillation technology can produce higher purity target products than conventional distillation for the separation and purification of azeotropic or near-boiling compounds. Heat pump distillation and dividing wall column distillation are used in azeotropic distillation field, resulting in obvious energy-saving effect for distillation equipment. The follow-up research direction of new separation technology with the goal of reducing energy consumption and exploring new materials as entraining agents should be studied in detail, which provides certain guidance for the development of distillation technology in China's chemical industry.

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Dividing wall columns for heterogeneous azeotropic distillation

Cited by 75 publications

References 4 publications

Optimization of the composition of mixed entrainer for economic extractive distillation process in view of the separation of tetrahydrofuran/ethanol/water ternary azeotrope

Optimization of the composition of mixed entrainer for economic extractive distillation process in view of the separation of tetrahydrofuran/ethanol/water ternary azeotrope

Process intensification connects scales and disciplines towards sustainability

Research Progress on Azeotropic Distillation Technology

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