Revisiting the binary azeotropic separation containing tetrahydrofuran and ethanol: Design and control of extractive distillation using dimethyl sulfoxide as alternative solvent

Kong, Zong Yang; Yang, Ao; Saptoro, Agus; Sunarso, Jaka

doi:10.1016/j.dche.2022.100060

Cited by 5 publications

(4 citation statements)

References 31 publications

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“…A ratio control was additionally installed to maintain the solvent to total fresh feed ratio. These controls applied to both CED and SSED and are commonly found in existing studies 16,41,46 . As indicated previously, an additional FC is present in SSED and a ratio control was employed to maintain the ratio of fresh feed flowrate and side‐stream flowrate, for the sake of overall material balance in system.…”

Section: Methodsmentioning

confidence: 99%

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Analyzing the sustainability of intensified side‐stream extractive distillation for binary azeotropic separation: a comparative study

Kong

Sánchez‐Ramírez

Yang

et al. 2023

J of Chemical Tech & Biotech

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BACKGROUND: The sustainability performance of extractive distillation (ED) that collectively considers energy efficiency, process safety, economic profitability, process control, and environmental emission has not been widely reported. Motivated by this lack of research, we analyzed and compared the sustainability performance of the intensified side-stream ED (SSED) with that of the conventional extractive distillation (CED) for the separation of binary azeotropic mixtures. Two different design approaches were analyzed; the first approach involves designing the intensified SSED by preserving the original CED column configuration, while the second approach involves optimizing the original column configuration to become a new intensified SSED configuration. RESULTS: We found that preserving the original configuration usually provides energy-savings, but this advantage is not guaranteed unless the process is optimized. Generally, the reduction in energy consumption improves economic and environmental performance. However, the optimized design has a higher risk index because it is usually larger in size, for the sake of lowering the energy consumption. In addition, the optimized design usually has a higher condition number, which signifies that a more complex control structure is required. CONCLUSION: Altogether, designing the intensified process via process optimization does not always guarantee significant improvement in all sustainability indicators.

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Section: Methodsmentioning

confidence: 99%

“…Figure 2 displays the process flow diagram for the separation of THF and ethanol using DMSO reproduced from the most recent study 41 . Aside from the difference in fresh feed mixtures, the process configuration for this case (Fig.…”

Section: Description Of Case Studiesmentioning

confidence: 99%

Analyzing the sustainability of intensified side‐stream extractive distillation for binary azeotropic separation: a comparative study

Kong

Sánchez‐Ramírez

Yang

et al. 2023

J of Chemical Tech & Biotech

Self Cite

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“…In this work, the binary azeotropic separation of tetrahydrofuran (THF) and ethanol from the work of Duan and Li 27 was used as a case study because it is the most recent study on the FS configuration. THF has been widely used as organic solvent in various chemical industries, such as in the production of adipic acid, while ethanol is commonly used in the pharmaceutical and health industries 30 . Although many studies have recently worked on the binary azeotropic separation of THF and ethanol, no studies have employed FS extractive distillation other than the work by Duan and Li, 27 thus highlighting the novelty of this work.…”

Section: Process Configurationsmentioning

confidence: 96%

“…THF has been widely used as organic solvent in various chemical industries, such as in the production of adipic acid, while ethanol is commonly used in the pharmaceutical and health industries. 30 Although many studies have recently worked on the binary azeotropic separation of THF and ethanol, no studies have employed FS extractive distillation other than the work by Duan and Li, 27 thus highlighting the novelty of this work. Both the conventional and FS configurations were reproduced and their process flow diagrams are displayed in Fig.…”

Section: Process Configurationsmentioning

confidence: 99%

Control of new energy‐intensified triple column extractive distillation using feed split technique

Kong

Wang

Yang

et al. 2023

J of Chemical Tech & Biotech

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BACKGROUND Here, we investigated the control performance of extractive distillation intensified with ‘feed split’ (FS) technique – a process intensification technique that has not been widely applied to extractive distillation. Today, only a handful of studies have been reported on this topic, with only one focusing on the control performance and reporting the significant trade‐off between the steady‐state and dynamic performances. Nonetheless, the previous control study was based on the complex double column FS configuration. Recently, a new triple column FS configuration was reported (Sep. Purif. Technol. 2022 (297) 121467), but its control performance was not investigated. Hypothetically, the triple column FS configuration is less complex and does not involve any column integration and thus, may demonstrate a better dynamic performance. This study analyzed the control performances of the triple column FS configuration and the conventional configuration for the binary azeotropic separation of tetrahydrofuran and ethanol. RESULTS Two types of control structures were examined for both configurations, i.e., the basic temperature control structure and the different feed forward temperature control schemes. The best control structure from each configuration is compared and findings showed that the conventional configuration provides better controllability performance. CONCLUSION Our results suggested that the conventional configuration can bring the product qualities closer to their setpoint, while providing a lower transient deviation. © 2023 Society of Chemical Industry (SCI).

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Process Safety and Environmental Protection for Extractive Distillation: A Guide to the Application of Inherent Risk and Eco-Indicator 99

Kong,

Heah,

Sánchez-Ramírez

et al. 2024

Contributions of Chemical Engineering to Sustainability

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Revisiting the binary azeotropic separation containing tetrahydrofuran and ethanol: Design and control of extractive distillation using dimethyl sulfoxide as alternative solvent

Cited by 5 publications

References 31 publications

Analyzing the sustainability of intensified side‐stream extractive distillation for binary azeotropic separation: a comparative study

Analyzing the sustainability of intensified side‐stream extractive distillation for binary azeotropic separation: a comparative study

Control of new energy‐intensified triple column extractive distillation using feed split technique

Process Safety and Environmental Protection for Extractive Distillation: A Guide to the Application of Inherent Risk and Eco-Indicator 99

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