Ionic liquid extractive distillation for the recovery of diisopropyl ether and isopropanol from industrial effluent: Experiment and simulation

Qi, Jun; Zhu, Ruisong; Han, Xiaoyan; Zhao, Hongkang; Li, Qunsheng; Lei, Zhigang

doi:10.1016/j.jclepro.2020.120132

Cited by 57 publications

(29 citation statements)

References 47 publications

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“…Under the condition of meeting the design rule, tower’s parameters needed to be optimized, including the plate number of EDC ( N T1 ), the feeding position for the mixture in EDC ( N F1 ), the position for adding the entrainer ( N F2 ), the amount of the entrainer ( S ), the plate number of ERC ( N T2 ), and the feeding position in ERC ( N F ). The optimization method was as given in Figure − and the total annual cost (TAC) as the optimization goal.…”

Section: Simulationmentioning

confidence: 99%

Vapor–Liquid Equilibrium Experiment and Process Simulation for Methanol and Ethyl Formate at 101.3 kPa

Han

Wang

et al. 2021

J. Chem. Eng. Data

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As there is an azeotropic point between methanol and ethyl formate, they cannot be completely separated by ordinary distillation. In this paper, extractive distillation was applied and dimethyl sulfoxide (DMSO) and ethylene glycol (EG) were used as entrainers. Vapor−liquid equilibrium (VLE) data for methanol−ethyl formate, methanol−ethyl formate−DMSO, and methanol− ethyl formate−EG were measured at 101.3 kPa, and the NRTL model was applied for data fitting. It was found that the experimental value and the calculated value were accordant well through the deviation value. Then, the NRTL model was used for simulation by Aspen Plus to achieve the separation goal, and it verified the feasibility of the experimental scheme.

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Section: Simulationmentioning

confidence: 99%

Vapor–Liquid Equilibrium Experiment and Process Simulation for Methanol and Ethyl Formate at 101.3 kPa

Han

Wang

et al. 2021

J. Chem. Eng. Data

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“…7 The IL-based aromatic ED processes have also been investigated widely compared with other separation tasks. 8,9 Currently, similar to the case in other IL-based applications, most studies on ED processes focus on the experiments for screening potential ILs. 10,11 Nevertheless, in view of numerous feasible cation−anion combinations, the experiment is greatly time-consuming and cost-intensive to select the IL candidates.…”

Section: Introductionmentioning

confidence: 99%

Optimal Design of an Ionic Liquid (IL)-Based Aromatic Extractive Distillation Process Involving Energy and Economic Evaluation

Yang

Zhou

Wei

et al. 2021

Ind. Eng. Chem. Res.

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Extractive distillation (ED) can be used to separate mixtures with low relative volatilities that are even close to unity. It is widely adopted for the separation of aromatics and nonaromatics in the petrochemical industry. Selecting a suitable solvent is of paramount importance to ED processes. Ionic liquids (ILs) are increasingly being considered as potential options to replace organic solvents in ED processes due to their favorable properties including high boiling points and extremely low volatilities. In this work, a nonexperimental solvent screening approach, i.e., computer-aided ionic liquid design (CAILD), is employed to identify the optimal ILs. Using a novel design objective and several structural and property constraints on IL, we have identified 1,3-dimethylpyridinium tetrafluoroborate ([C1mPy][BF4]) as the best IL solvent by solving a formulated CAILD-based mixed-integer nonlinear programming problem. The separation performance of this IL is further evaluated with rigorous process simulation in Aspen Plus. Besides, process simulation of the aromatic ED process using sulfolane as the benchmark organic solvent is performed. Furthermore, a systematic analysis of the energy consumption and the process economy is conducted by investigating the optimized simulation results of the studied aromatic ED process. The [C1mPy][BF4]-based process with an assumed IL price of 50 $/kg can reduce the capital cost by 35.2%, the operating cost by 11.8%, and the total annual cost by 31.2%. The IL price at the break-even point of replacing sulfolane with [C1mPy][BF4] in the aromatic ED process is 91.03 $/kg.

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“…The calculation formula of

S_{ij}^{\infty}

is as follows [Eq. 1] 19:

true S_{normalij}^{\infty} = \frac{γ_{normali normal, normalIL}^{\infty}}{γ_{normalj normal, normalIL}^{\infty}}

…”

Section: Screening Of Ionic Liquids Based On the Cosmo‐sac Modelmentioning

confidence: 99%

“…The literature 19, 20, 22 gives the binary interaction parameters between the system and the ionic liquid, as shown in Tab. 3.…”

Section: Design Optimization Of the Azeotropic System For Separating ...mentioning

confidence: 99%

“…Compared with the experimental data, these values are accurate enough [18]. Qi et al recovered diisopropyl ether (DIPE) and isopropyl alcohol (IPA) from industrial wastewater through extractive distillation; the most suitable extractant, i.e., 1-ethyl-3-methylimidazolium acetate ([EMIM][AC]) was screened by comparing the selectivity of DIPE to IPA and IPA to water in ionic liquids composed of nine common cations and 12 common anions [19].…”

Section: Introductionmentioning

confidence: 99%

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Energy‐Saving Separation of the Ethanol‐tert‐Butanol‐Water Azeotrope System Based on an Ionic Liquid

et al. 2022

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The separation requirements of the ethanol‐tert‐butanol‐water system are difficult to meet due to the formation of azeotropes under normal pressure. After screening the four most important ionic liquids, i.e., [BMIM][BF4], [EMIM][Cl], [HMIM][Cl], and [EMIM][AC], ionic liquid [EMIM][AC] was selected as extractant, and quantum chemical calculations based on COSMO‐SAC theory were carried out to analyze the mechanism of the separation process. An ethanol‐tert‐butanol‐water extractive distillation process was designed, optimized with the goal of the lowest total annual economic cost, and the cost of carbon dioxide emissions was calculated. To further save energy, a heat pump distillation process was designed and compared with the conventional ionic liquid process. The annual total cost of the heat pump distillation process is reduced by 10.11 %, and carbon dioxide emission costs are reduced by 61.9 %. Comparison with the conventional extractive distillation process and its modified process revealed economic advantages for the ionic liquid extractive distillation process and its heat pump version.

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Ionic liquid extractive distillation for the recovery of diisopropyl ether and isopropanol from industrial effluent: Experiment and simulation

Cited by 57 publications

References 47 publications

Vapor–Liquid Equilibrium Experiment and Process Simulation for Methanol and Ethyl Formate at 101.3 kPa

Vapor–Liquid Equilibrium Experiment and Process Simulation for Methanol and Ethyl Formate at 101.3 kPa

Optimal Design of an Ionic Liquid (IL)-Based Aromatic Extractive Distillation Process Involving Energy and Economic Evaluation

Energy‐Saving Separation of the Ethanol‐tert‐Butanol‐Water Azeotrope System Based on an Ionic Liquid

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