Optimization and model-based control of sustainable ethyl-methyl carbonate and diethyl carbonate synthesis through reactive distillation

Ge, Xiaolong; Han, Yicheng; Liu, Pengfei; Liu, Botan; Liu, Botong

doi:10.1016/j.jclepro.2022.133618

Cited by 9 publications

(2 citation statements)

References 37 publications

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“…In this study, two metrics are used to quantitatively evaluate the dynamic response performances of developed control structures. Integral of absolute error (IAE) [ 46 ] or integral of squared error (ISE) [ 47 ] are commonly used as dynamic performance evaluation indices in several control studies. They basically represent the area calculated based on the difference between dynamic and set point values of the controlled variables over time after the disturbance is given to the system.…”

Section: Resultsmentioning

confidence: 99%

Control structure selection of increased‐pressure extractive distillation process for DMC‐MeOH azeotropic mixture

Varyemez,

Kaymak

2023

Can J Chem Eng

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Producing dimethyl carbonate (DMC) as a green chemical with the desired purity is important in the industry. Although studies on the steady‐state design of energy‐efficient extractive distillation processes are important for the purification of DMC‐methanol (DMC‐MeOH) azeotropic mixtures, the dynamic controllability of these processes is also critical in the case of feed condition changes, and it should be investigated carefully. Results of the limited studies in the literature show that changing the operating pressures in extractive distillation processes might have different effects on the dynamic controllability of different systems. Thus, in this study, alternative control strategies are developed for a recently proposed increased‐pressure extractive distillation process to separate DMC‐MeOH mixture. All control structures are designed using inferential temperature controllers, which have a general acceptance in industrial applications. Effects of different ratio controllers are investigated by evaluating the dynamic responses of control structures for disturbances in feed flowrate and composition. Two metrics including integral absolute error and steady‐state deviation of purities are used in the evaluation of alternatives. Results of dynamic simulations show that a control structure including reflux ratio controller is not a suitable strategy for this process. It is demonstrated that a control structure including reflux to feed ratio controller for both distillation columns is necessary for the robust and efficient control of a pressure‐increased extractive distillation process. These efficient dynamic results support the economic advantage of increased‐pressure extractive distillation process separating DMC‐MeOH azeotropic mixtures.

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Section: Resultsmentioning

confidence: 99%

Control structure selection of increased‐pressure extractive distillation process for DMC‐MeOH azeotropic mixture

Varyemez,

Kaymak

2023

Can J Chem Eng

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“…7 In the effective synthesis of EMC via the transesterification of DMC with ethanol, it is crucial to use basic catalysts with appropriate Lewis basicity since there is a trade-off between catalytic activity and selectivity for EMC production due to the two-step consecutive reaction process with distinct active energy (Scheme 1(a), E 1 = 36.53 ± 3.74 kJ•mol −1 and E 2 = 54.62 ± 2.46 kJ•mol −1 ). 8,9 Specifically, the basic catalysts facilitate transesterification by deprotonating the hydroxyl group of ethanol, generating activated ethoxide intermediates that could then react with the carbonyl carbon atom of DMC to produce EMC and methanol. However, excessive Lewis basicity could result in further transesterification between the product EMC and ethanol, leading to the formation of diethyl carbonate (DEC) as a byproduct to reduce the selectivity of EMC.…”

Section: ■ Introductionmentioning

confidence: 99%

Fine-Tuning Electron–Donor Capability in the Basic Anion of Poly(ionic liquid) Frameworks for Revolutionizing Catalytic Synthesis of Ethyl Methyl Carbonate with Both Ultrahigh Catalytic Activity and Selectivity

Chen,

Huang,

Gong

et al. 2024

Langmuir

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Ethyl methyl carbonate (EMC) is a crucial solvent extensively utilized in lithium-ion battery electrolytes; the transesterification of dimethyl carbonate (DMC) with ethanol is a pivotal reaction for EMC production. However, this reaction faces challenges due to the trade-off between catalytic activity and selectivity from the basic catalysts. In this issue, we report an innovative strategy through fine-tuning the electron-donor capability of the basic phenolate anion ([PhO]) in a novel poly(ionic liquid) (PIL) framework, as synthesized via an alkylation reaction between 1,3,5-tris(bromomethyl)benzene, biphenyldiimidazole, and N,N′-carbonyldiimidazole (CDI) to trigger targeted basicity that can directionally catalyze the transesterification of DMC with ethanol, so as to achieve both ultrahigh catalytic activity and selectivity toward EMC. By varying the substituent groups with electron-withdrawing and electron-donating effects on the phenolate anion, the PILs show expected changes in the catalytic performance, following well with the trend of charge density on these substituted phenolate anions. The optimized catalyst [CPIL-CDI][MeOPhO], induced by p-methoxyphenolate anions, allows an extraordinary EMC yield of 72.19% and an EMC selectivity of 91.48% under mild conditions without any process intensifications, suppressing all of the reported catalysts reported to date. Outcomes and approaches shown in this work have the potential to expedite the systematic design of cations and anions within PILs for industrial-scale EMC production through environmentally friendly transesterification processes.

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Nitrogen-rich carbon nanosheets supported copper catalysts for oxidative carbonylation of ethanol

Peng,

Ren,

Zhao

et al. 2025

Applied Surface Science

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Optimization and model-based control of sustainable ethyl-methyl carbonate and diethyl carbonate synthesis through reactive distillation

Cited by 9 publications

References 37 publications

Control structure selection of increased‐pressure extractive distillation process for DMC‐MeOH azeotropic mixture

Control structure selection of increased‐pressure extractive distillation process for DMC‐MeOH azeotropic mixture

Fine-Tuning Electron–Donor Capability in the Basic Anion of Poly(ionic liquid) Frameworks for Revolutionizing Catalytic Synthesis of Ethyl Methyl Carbonate with Both Ultrahigh Catalytic Activity and Selectivity

Nitrogen-rich carbon nanosheets supported copper catalysts for oxidative carbonylation of ethanol

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