Screening ionic liquids for developing advanced immobilization technology for CO2 separation

Dai, Zhengxing; Chen, Yifeng; Sun, Yunhao; Zuo, Zhida; Lü, Xiaohua; Ji, Xiaoyan

doi:10.3389/fchem.2022.941352

Cited by 3 publications

(1 citation statement)

References 60 publications

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“…The models can be divided into two categories: COSMO-RS (COSMO for real solvents) and COSMO-SAC (COSMO segment activity coefficient) models. The former was first proposed by Klamt in 1995 − and has been widely used in the prediction of phase behavior, e.g., VLE, LLE, and solid–liquid equilibrium (SLE) activity coefficients, gas solubility, Henry’s coefficient, and even separation process design for IL systems. − The latter was first proposed by Lin and Sandler in 2002 to solve the strict thermodynamic consistency problem based on the framework of the COSMO-RS model and has received extensive attention among researchers in predicting the thermodynamic properties of IL systems. − …”

Section: Predictive Molecular Thermodynamic Modelsmentioning

confidence: 99%

Hydrocarbon Extraction with Ionic Liquids

Yu,

Dai,

Liu

et al. 2024

Chem. Rev.

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Separation and reaction processes are key components employed in the modern chemical industry, and the former accounts for the majority of the energy consumption therein. In particular, hydrocarbon separation and purification processes, such as aromatics extraction, desulfurization, and denitrification, are challenging in petroleum refinement, an industrial cornerstone that provides raw materials for products used in human activities. The major technical shortcomings in solvent extraction are volatile solvent loss, product entrainment leading to secondary pollution, low separation efficiency, and high regeneration energy consumption due to the use of traditional organic solvents with high boiling points as extraction agents. Ionic liquids (ILs), a class of designable functional solvents or materials, have been widely used in chemical separation processes to replace conventional organic solvents after nearly 30 years of rapid development. Herein, we provide a systematic and comprehensive review of the state-of-the-art progress in ILs in the field of extractive hydrocarbon separation (i.e., aromatics extraction, desulfurization, and denitrification) including (i) molecular thermodynamic models of IL systems that enable rapid large-scale screening of IL candidates and phase equilibrium prediction of extraction processes; (ii) structure–property relationships between anionic and cationic structures of ILs and their separation performance (i.e., selectivity and distribution coefficients); (iii) IL-related extractive separation mechanisms (e.g., the magnitude, strength, and sites of intermolecular interactions depending on the separation system and IL structure); and (iv) process simulation and design of IL-related extraction at the industrial scale based on validated thermodynamic models. In short, this Review provides an easy-to-read exhaustive reference on IL-related extractive separation of hydrocarbon mixtures from the multiscale perspective of molecules, thermodynamics, and processes. It also extends to progress in IL analogs, deep eutectic solvents (DESs) in this research area, and discusses the current challenges faced by ILs in related separation fields as well as future directions and opportunities.

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Section: Predictive Molecular Thermodynamic Modelsmentioning

confidence: 99%

Hydrocarbon Extraction with Ionic Liquids

Yu,

Dai,

Liu

et al. 2024

Chem. Rev.

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Novel Index to Screen and Evaluate Ionic Liquids for CO₂/CH₄ Separation

Chen,

Wang,

Wang

et al. 2024

Ind. Eng. Chem. Res.

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Efficient CO2/CH4 separation for biogas upgrading can be achieved by using ionic liquids (ILs) as absorbents. In this study, a novel index named “relative absorption ability” (RAA) was proposed for the first time to facilitate the screening and evaluation of potential absorbents based on their thermodynamic and kinetic properties for CO2/CH4 separation. Subsequently, the properties of 2009 ILs were predicted with the conductor-like screening model, and the top 10 ILs were screened. Finally, the cost of the screened top two ILs for CO2/CH4 separation was further estimated with process simulation. The results further prove the reliability of the new proposed RAA index in screening and evaluating, and the screened promising ILs can reduce the costs of CO2/CH4 separation by 53.9% and 51.9%, respectively, in comparison to the current commercial technology.

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Enhanced CO₂ Capture through SAPO-34 Impregnated with Ionic Liquid

Ye,

Shen,

Chen

et al. 2024

Langmuir

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The concurrent utilization of an adsorbent and absorbent for carbon dioxide (CO 2 ) adsorption with synergistic effects presents a promising technique for CO 2 capture. Here, 1-butyl-3-methylimidazole acetate ([Bmim][Ac]), with a high affinity for CO 2 , and the molecular sieve SAPO-34 were selected. The impregnation method was used to composite the hybrid samples of [Bmim][Ac]/ SAPO-34, and the pore structure and surface property of prepared samples were characterized. The quantity and kinetics of the sorbed CO 2 for loaded samples were measured using thermogravimetric analysis. The study revealed that SAPO-34 could retain its pristine structure after [Bmim][Ac] loading. The CO 2 uptake of the loaded sample was 1.879 mmol g −1 at 303 K and 1 bar, exhibiting a 20.6% rise compared to that of the pristine SAPO-34 recording 1.558 mmol g −1 . The CO 2 uptake kinetics of the loaded samples were also accelerated, and the apparent mass transfer resistance for CO 2 sorption was significantly reduced by 11.2% compared with that of the pure [Bmim][Ac]. The differential scanning calorimetry method revealed that the loaded sample had a lower CO 2 desorption heat than that of the pure [Bmim][Ac], and the CO 2 desorption heat of the loaded samples was between 30.6 and 40.8 kJ mol −1 . The samples exhibited good cyclic stability. This material displays great potential for CO 2 capture applications, facilitating the reduction of greenhouse gas emissions.

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Screening ionic liquids for developing advanced immobilization technology for CO2 separation

Cited by 3 publications

References 60 publications

Hydrocarbon Extraction with Ionic Liquids

Hydrocarbon Extraction with Ionic Liquids

Novel Index to Screen and Evaluate Ionic Liquids for CO₂/CH₄ Separation

Enhanced CO₂ Capture through SAPO-34 Impregnated with Ionic Liquid

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Screening ionic liquids for developing advanced immobilization technology for CO2 separation

Cited by 3 publications

References 60 publications

Hydrocarbon Extraction with Ionic Liquids

Hydrocarbon Extraction with Ionic Liquids

Novel Index to Screen and Evaluate Ionic Liquids for CO2/CH4 Separation

Enhanced CO2 Capture through SAPO-34 Impregnated with Ionic Liquid

Contact Info

Product

Resources

About

Novel Index to Screen and Evaluate Ionic Liquids for CO₂/CH₄ Separation

Enhanced CO₂ Capture through SAPO-34 Impregnated with Ionic Liquid