Separation of CO2/CH4 through alumina-supported geminal ionic liquid membranes

Shahkaramipour, Nima; Adibi, Mina; Seifkordi, Ali Akbar; Fazli, Yousef

doi:10.1016/j.memsci.2013.12.039

Cited by 53 publications

(27 citation statements)

References 29 publications

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“…,23 suggesting that these fluids could be useful for carrying out absorption-based CO 2 separations. [24][25][26][27][28][29] There are at least two major drawbacks to the use of ILs as solvents for gas separations. ILs tend to be much more viscous than organic solvents 30 and many of them are also more expensive than commodity solvents.…”

Section: Introductionmentioning

confidence: 99%

Molecular Simulation Study of the Solubility, Diffusivity and Permselectivity of Pure and Binary Mixtures of CO₂ and CH₄ in the Ionic Liquid 1-n-Butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide

Budhathoki

Shah

Maginn

2015

Ind. Eng. Chem. Res.

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The knowledge of the mixture solubility and diffusivity of gases in ILs is critical for the design of supported ionic liquid membranes (SILMs). Since mixed gas solubilities and diffusivities in ILs are much more difficult to measure than pure gas properties, pure gas solubility and diffusivity data are typically used along with an ideal solubility/diffusivity assumption to estimate permselectivities. It is not clear, however, if the ideal solubility and diffusivity assumptions are valid. In this work molecular dynamics (MD) and Gibbs ensemble Monte Carlo (GEMC) simulations were used to compute the diffusion selectivity and solubility selectivity of CO 2 and CH 4 in the ionic liquid (IL) 1-n-butyl-3-methylimidazolium bis(trifluoromethyl sulfonyl)imide ([C 4 mim] + [Tf 2 N] − ), along with the pure gas solubilities and diffusivities, in order to test the ideal permselectivity assumption. Pure gas solubilities of CO 2 and CH 4 in [C 4 mim] + [Tf 2 N] − at 333 K and pressures ranging from 1-100 bar were found to be in excellent agreement with literature values. Simulated CO 2 :CH 4 solubility selectivities in [C 4 mim] + [Tf 2 N] − at CO 2 :CH 4 gas phase mole ratios of 4:96, 8:92 and 16:84 were found tobe less than the ideal solubility selectivities computed from pure gas solubilities. Self-diffusion coefficients of pure CO 2 and CH 4 dissolved in the IL were independent of the concentration of the dissolved gases, within the studied pressure range. In CO 2 /CH 4 -[C 4 mim] + [Tf 2 N] − mixtures, self-diffusion coefficients of CO 2 and CH 4 were similar for all CO 2 :CH 4 mole ratios.Computed permselectivites were only slightly smaller than the ideal permselectivites computed from pure gas properties. Since the self-diffusion coefficients for CO 2 and CH 4 are similar, only solubility selectivity was found to influence the overall permselectivity of CO 2 over CH 4 in the IL.2

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Section: Introductionmentioning

confidence: 99%

Molecular Simulation Study of the Solubility, Diffusivity and Permselectivity of Pure and Binary Mixtures of CO₂ and CH₄ in the Ionic Liquid 1-n-Butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide

Budhathoki

Shah

Maginn

2015

Ind. Eng. Chem. Res.

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“…One technology that has attracted interest is the use of supported ionic liquid membranes (SILMs) for gas sweetening [19,20]. SILMs are produced by impregnating a porous membrane with a small amount of IL.…”

Section: Introductionmentioning

confidence: 99%

Natural gas purification using supported ionic liquid membrane

Althuluth

Overbeek

Wees

et al. 2015

Journal of Membrane Science

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“…There are several works available in the literatures where SILMs were studied for potential applications in gas separation [14,[39][40][41][42][43][44]. Gas separation research using SILMs dates back to at least 1995 [45].…”

Section: Silms In Gas Separationmentioning

confidence: 99%

A Review on Gas Separation Applications of Supported Ionic Liquid Membranes

2015

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The selection of the separation process is a critical issue in the chemical industries. Among different conventional methods for the separation processes, supported liquid membrane (SLM)-based separation processes have been predicted as a promising option. However, the industrial use of supported liquid membranes based on conventional liquids is limited by their relative instability and short lifetime. The use of ionic liquids as a liquid membrane phase results in the stabilization of the SLMs due to their negligible vapor pressure, possibility of minimizing their solubility in the surrounding phases and greater capillary force associated with their high viscosity, which can reduce the displacement of liquids from micron pores under pressure. In this review, recent advances in supported membranes based on ionic liquids including issues such as methods of synthesis IL, methods of preparation of supported ionic liquid membranes and application of supported ionic liquid membranes in gas separation are presented.

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Separation of CO2/CH4 through alumina-supported geminal ionic liquid membranes

Cited by 53 publications

References 29 publications

Molecular Simulation Study of the Solubility, Diffusivity and Permselectivity of Pure and Binary Mixtures of CO₂ and CH₄ in the Ionic Liquid 1-n-Butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide

Molecular Simulation Study of the Solubility, Diffusivity and Permselectivity of Pure and Binary Mixtures of CO₂ and CH₄ in the Ionic Liquid 1-n-Butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide

Natural gas purification using supported ionic liquid membrane

A Review on Gas Separation Applications of Supported Ionic Liquid Membranes

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Separation of CO2/CH4 through alumina-supported geminal ionic liquid membranes

Cited by 53 publications

References 29 publications

Molecular Simulation Study of the Solubility, Diffusivity and Permselectivity of Pure and Binary Mixtures of CO2 and CH4 in the Ionic Liquid 1-n-Butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide

Molecular Simulation Study of the Solubility, Diffusivity and Permselectivity of Pure and Binary Mixtures of CO2 and CH4 in the Ionic Liquid 1-n-Butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide

Natural gas purification using supported ionic liquid membrane

A Review on Gas Separation Applications of Supported Ionic Liquid Membranes

Contact Info

Product

Resources

About

Molecular Simulation Study of the Solubility, Diffusivity and Permselectivity of Pure and Binary Mixtures of CO₂ and CH₄ in the Ionic Liquid 1-n-Butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide

Molecular Simulation Study of the Solubility, Diffusivity and Permselectivity of Pure and Binary Mixtures of CO₂ and CH₄ in the Ionic Liquid 1-n-Butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide