The CO2/CH4 gas mixture solubility in ionic liquids [Bmim][Ac], [Bmim][BF4] and their binary mixtures

Shaahmadi, Fariborz; Shahraki, Bahram Hashemi; Farhadi, Asadollah

doi:10.1016/j.jct.2019.105922

Cited by 20 publications

(13 citation statements)

References 29 publications

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“…Tomé et al have reported that the CO 2 /N 2 separation of IL mixture-based SILMs is better than that of pure ILs . Recently, Shaahmadi et al found that the solubility of CO 2 has been enhanced in the presence of binary mixture of ILs such as [BMIM][OAc] and [BMIM][BF 4 ] . They found that CO 2 /CH 4 selectivity is significantly enhanced in the presence of excess [BMIM][BF 4 ] pairs.…”

Section: Resultsmentioning

confidence: 99%

The Role of Binary Mixtures of Ionic Liquids in ZIF-8 for Selective Gas Storage and Separation: A Perspective from Computational Approaches

Thomas

Prakash

2020

J. Phys. Chem. C

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Carbon dioxide is one of the major causes of global climatic changes. Efficient separation of CO 2 from different gaseous mixtures can be helpful in flue gas separation, gas sweetening, natural gas processing, and so forth. Adsorption in porous materials is emerging as one of the best techniques in this regard. Also CO 2 is easily soluble in ionic liquids (ILs). Hence, we have designed IL (designer solvent)-based composite materials by impregnating ILs into the pores of zeolitic imidazolate framework (ZIF)-8. In this study, we have computationally explored the properties of such composites. Mixture of different types of ILs can enhance composite material properties and leads to efficient gas separation. We studied both simple and binary mixtures of ILs in the nanopores of ZIF-8 using density functional theory (DFT) and grand canonical Monte Carlo (GCMC) methods. ZIF-8 retained its core structure even after IL incorporation, and also the ILs were well dispersed in the confinement. Gas adsorption studies were performed for gases such as CO 2 , N 2 , and CH 4 and their binary mixtures. Both singlecomponent and binary mixture adsorptions were similar at a pressure less than 1 bar. The selectivity calculated from the gas mixture adsorption elicited that our materials show good selective adsorption of CO 2 compared with the other two gases. The binary mixture of ILs enhanced the CO 2 selectivity by 3.5-fold higher than simple ILs@ZIF-8. Especially, the composite with hydrophobic− hydrophobic binary IL mixture has higher CO 2 selectivity than other materials, attributed to the strong interactions between CO 2 and IL anions. The like−like hydrophobic ion pair and the fluorine content in the IL enhanced the selective adsorption of CO 2 . The binary IL mixtures at the confinement can be a novel alternative to the prevailing materials in gas separation applications.

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Section: Resultsmentioning

confidence: 99%

The Role of Binary Mixtures of Ionic Liquids in ZIF-8 for Selective Gas Storage and Separation: A Perspective from Computational Approaches

Thomas

Prakash

2020

J. Phys. Chem. C

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“…The design of suitable solvent is important to separate CO2 from natural gas. In work, [53] the abilities of ILs 1-buthyl-3-methylimidazolium acetate, [bmim][Ac], 1-butyl-3-methylimidazolium tetrafluoroborate, [bmim][BF 4 ], and their binary mixtures are experimentally investigated for CO 2 separation from CH 4 .…”

Section: Co2 Capture In Ionic Liquidsmentioning

confidence: 99%

Imidazolium-Based Ionic Liquids: Some Research Methods, Applications and Physico-Chemical Properties

Tomaš

2021

Croat. Chem. Acta

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Imidazolium-based ionic liquids (ILs) represent a well-studied class of ILs. These compounds are characterized by many fascinating properties such as non-flammability, low vapor pressure, wide electrochemical window, and thermodynamic and kinetic stability. This review paper aims to provide an insight into some experimental methods of investigations and applications of these ILs. Additionally, some results on the topic of imidazolium-based ILs in various solvents are presented.

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“…This still involves, however, the in situ measurement of one system at the time after equilibrium is reached and generates the disturbance of said equilibrium. Naturally it then requires longer or a larger number of measurements. , …”

Section: Introductionmentioning

confidence: 99%

“…Naturally it then requires longer or a larger number of measurements. 17,18 Here we describe a new method that combines the pressure drop technique on samples contained in pressurized headspace GC (HS-GC) vials (between 500 and 2500 mbar) with quantitative GC analysis of the equilibrated headspace.…”

Section: ■ Introductionmentioning

confidence: 99%

A High-Throughput Experimental Approach to Screening Gas Sorption by Liquids and Solids

Young,

McCalmont,

Fourmentin

et al. 2023

ACS Sustainable Chem. Eng.

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High-precision measurement of gas uptake from single or mixed feeds in solid and liquid sorbents traditionally requires time-consuming experimental procedures and/or complex and costly equipment. A simple and cost-effective headspace gas chromatography (HS-GC) approach for the fast, universal experimental screening of sorbents for gas uptake and/or determination of their real gas separation selectivity has been developed and is demonstrated for pressures up to 2500 mbar and temperatures above 30 °C. This method allows screening of solids and both volatile and nonvolatile liquid materials, physisorbents, and chemisorbents using both single and mixed permanent gases that can include CO 2 , CH 4 , H 2 , and NH 3 , for gas uptakes as low as 0.04 mmol or 1.8 mg of CO 2 . We estimate that this method allows for the screening of at least 30–96 sorbents (in triplicate) or 90–264 sorbents (singles) per day, representing at least a 90–3000 times reduction in the time required for equivalent analysis.

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The CO2/CH4 gas mixture solubility in ionic liquids [Bmim][Ac], [Bmim][BF4] and their binary mixtures

Cited by 20 publications

References 29 publications

The Role of Binary Mixtures of Ionic Liquids in ZIF-8 for Selective Gas Storage and Separation: A Perspective from Computational Approaches

The Role of Binary Mixtures of Ionic Liquids in ZIF-8 for Selective Gas Storage and Separation: A Perspective from Computational Approaches

Imidazolium-Based Ionic Liquids: Some Research Methods, Applications and Physico-Chemical Properties

A High-Throughput Experimental Approach to Screening Gas Sorption by Liquids and Solids

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