CO2 absorption using a hybrid 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide/titanium dioxide/polyethylene glycol absorbent

Chen, Yifeng; Dai, Zhengxing; Ji, Xiaoyan; Lü, Xiaohua

doi:10.1016/j.fluid.2021.113011

Cited by 6 publications

(2 citation statements)

References 35 publications

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“…The increase in carbon dioxide (CO 2 ) in the atmosphere is mainly due to the release of flue gas, the burning of natural gas, etc. [1][2][3][4]. Meanwhile, the existence of CO 2 reduces the exploitation value of natural gas, affects the combustion efficiency of methane, increases cost, and leads to pipeline corrosion [5,6].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Polyimide/Ionic Liquid Hybrid Membrane for CO2/CH4 Separation

Du,

Zhao,

et al. 2024

Polymers

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Imidazole ionic liquids (ILs) have good affinity and good solubility for carbon dioxide (CO2). Such ionic liquids, combined with polyimide membrane materials, can solve the problem that, today, CO2 is difficult to separate and recover. In this study, the ionic liquid (IL) of 1-ethyl-3-methylimidazolium tetrafluoroborate (IL1), 1-pentyl-3-methylimidazolium tetrafluoroborate (IL2), 1-octyl-3-methylimidazolium tetrafluoroborate (IL3), and 1-dodecylimidazolium tetrafluoroborate (IL4) with different contents were added to a polyimide matrix, and a series of polyimide membranes blended with ionic liquid were prepared using a high-speed mixer. The mechanical properties and gas separation permeability of the membranes were investigated. Among them, the selectivity of the PI/IL3 membrane for CO2/CH4 was 180.55, which was 2.5 times higher than the PI membrane, and its CO2 permeability was 16.25 Barrer, which exceeded the Robeson curve in 2008; the separation performance of the membrane was the best in this work.

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Section: Introductionmentioning

confidence: 99%

Preparation of Polyimide/Ionic Liquid Hybrid Membrane for CO2/CH4 Separation

Du,

Zhao,

et al. 2024

Polymers

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“…The methods and theories for obtaining the standard thermodynamic properties of bulk fluids have been very well established. Taking the Henry's constant as an example (Kazarina et al, 2023), the infinitely dilute state is set as the reference and standard states, and the Henry's constant is obtained from the experimental data by taking the limit of zero composition (Ivanov, 2018) based on the law of colligative properties of solutions (Aghaie et al, 2019;Chen et al, 2021). Principally, such a method can be used to determine the thermodynamic properties of the interfacial fluids, for example, the ILs immobilized on the solid surface.…”

Section: Introductionmentioning

confidence: 99%

Determination of standard molar volume of 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide on titanium dioxide surface

Ye,

Dai,

Chen

et al. 2024

Front. Chem.

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The fluids near the solid substrate display different properties compared to the bulk fluids owing to the asymmetric interaction between the fluid and substrate; however, to the best of our knowledge, no work has been conducted to determine the interfacial properties of fluids experimentally. In this work, we combined a pycnometer with experimental measurements and data processing to determine the standard thermodynamic properties of interfacial fluids for the first time. In the study, 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([Hmim][NTf2]) and titanium dioxide (P25) were chosen as the probes to prove the concept. It was found that, with the combination of the Gay-Lussac pycnometer and the colligative law, together with selecting a suitable solvent, it is possible and reliable to determine the standard molar volume of the immobilized [Hmim][NTf2]. Compared to the bulk phase, the molar volumes of [Hmim][NTf2] on the P25 surface reduce by 20.8%–23.7% at temperatures from 293.15 to 323.15 K, and the reduction degrees decrease with increasing temperatures. The newly determined standard thermodynamic data was used to obtain the model parameters of hybrid electrolyte perturbed-chain statistical associating fluid theory density functional theory (ePC-SAFT-DFT), and further predictions of the density of interfacial ionic liquids with different film thicknesses were proved to be reliable in comparison with the experiment results.

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Developing hybrid 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide/titanium dioxide/water absorbent for CO2 separation

Chen

Song

et al. 2022

Applied Energy

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CO2 absorption using a hybrid 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide/titanium dioxide/polyethylene glycol absorbent

Cited by 6 publications

References 35 publications

Preparation of Polyimide/Ionic Liquid Hybrid Membrane for CO2/CH4 Separation

Preparation of Polyimide/Ionic Liquid Hybrid Membrane for CO2/CH4 Separation

Determination of standard molar volume of 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide on titanium dioxide surface

Developing hybrid 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide/titanium dioxide/water absorbent for CO2 separation

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