Solubility and diffusivity of H2 and CO2 in the ionic liquid [bmim][PF6]

Barghi, Seyed Hamed; Tsotsis, Theodore T.; Sahimi, Muhammad

doi:10.1016/j.ijhydene.2015.05.037

Cited by 18 publications

(11 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As presented in Table , viscosities of the ILs are decreasing with increasing temperature, while diffusivity is increasing. This explanation is also given by Gonzalez-Miquel et al for CO 2 and Barghi et al for H 2 in ILs. Regarding the influence of the alkyl side-chain length in the imidazolium cation on diffusivity, longer chains tend to reduce diffusivity only for n = 8, as depicted in Figure .…”

Section: Resultssupporting

confidence: 79%

“…Hydrogen is still missing in this list. To the best of our knowledge, there is only one very recent report about hydrogen diffusivity in the ionic liquid [BMIM][PF 6 ] at this time . For a broad variety of possible IL–gas combinations, diffusion and solubility data are still not available.…”

Section: Introductionmentioning

confidence: 99%

“…To the best of our knowledge, there is only one very recent report about hydrogen diffusivity in the ionic liquid [BMIM]-[PF 6 ] at this time. 28 For a broad variety of possible IL−gas combinations, diffusion and solubility data are still not available. Particularly for slightly soluble gases like hydrogen, a simple and practicable determination method is lacking.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Measuring Diffusion and Solubility of Slightly Soluble Gases in [C_nMIM][NTf₂] Ionic Liquids

et al. 2016

View full text Add to dashboard Cite

We report an advanced experimental setup for the reliable determination of diffusion and solubility, especially for slightly soluble gases in ionic liquids. We were able to improve resolution and reproducibility of an isochoric saturation method by using differential pressure measurements. It was also possible to reduce the influence of wall adsorption, too. For the first time we present diffusion coefficients of hydrogen gas (H 2 ) in the ionic liquidsand [OMIM][NTf 2 ] at temperatures between 293.15 and 343.15 K. Henry's Law constants were determined simultaneously by fitting the experimental pressure decay to a one-dimensional diffusion model. With rising temperature, diffusion coefficients and solubility of H 2 were increased. Increasing the length of the alkyl side chain of the cation decreased diffusion, whereas solubility of H 2 was increased. An empirical correlation equation for H 2 diffusion in [C n MIM][NTf 2 ] ionic liquids is presented. Limitations are also pointed out. Furthermore, diffusion and solubility of carbon monoxide and carbon dioxide were investigated in [BMIM][NTf 2 ] and compared to that of H 2 .

show abstract

Section: Resultssupporting

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Measuring Diffusion and Solubility of Slightly Soluble Gases in [C_nMIM][NTf₂] Ionic Liquids

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Considering the low concentration of hydrogen in [Bmim][PF 6 ] at low pressures, this issue is aggravated. [39] The resulting power curve shows a maximum value of 0.7 μW cm À 2 at 1 μA cm À 2 . Compared to well-developed PEMFC devices, the obtained power is extremely low.…”

Section: Resultsmentioning

confidence: 94%

Conceptual Membraneless Fuel Cell Device Based On Ionic Liquid|Water Interface

et al. 2021

View full text Add to dashboard Cite

Ionic liquids (ILs) are considered as a new-generation electrolyte for electrochemical devices such as fuel cells. When in contact with water, ILs can form a liquid j liquid interface due to their hydrophobicity. This feature allows us to build a conceptual membraneless device for energy generation by combining the oxygen reduction and hydrogen oxidation reactions in acid aqueous electrolyte and in [Bmim][PF 6 ], respectively. The IL j water interface serves as an ion-exchange interface, allowing the proton transfer between the phases. The open circuit voltage (OCV) between the two half-cellsÞ achieves 1.34 V with a maximum power density of 0.7 μW cm À 2 at room temperature. Changes in the pH show no influence in the Galvani potential difference resulted from the IL j water interface and in the ðH 2 =H þ Þ ILÞ halfcell. Besides the relative low fuel cell power, the conceptual device has wide margin to improve, mainly in the cell design.

show abstract

“…He/CO 2 permeability and selectivity of SILPs based on hexyl methyl imidazolium were investigated at temperatures from 37 °C to 125 °C by Ilconich et al The results showed that the CO 2 /He ideal selectivity increased from 8.65 to 4.61 at studied temperature (72 -80 % selectivity). 24 Hanioka et al reported CO 2 separation from a CO 2 /CH 4 mixture using N-aminopropyl and methylimidazolium based ionic liquids from 25 °C to 75 °C, the selectivity increased from 7.33 to 9. 25 The permeability of groups of gases (CO 2 , SO 2 ) and (N 2 , O 2 , CO 2 , CH 4 ) has been investigated using different SILMs.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization, and Impregnation of Some Ionic Liquids on Polymer Membrane for Separation of Carbon Dioxide from Its Mixture with Methane

Bui

Uong

Nguyen

et al. 2018

Chem.Biochem.Eng.Q.

View full text Add to dashboard Cite

Some 1-alkyl-3-methylimidazolium-based ionic liquids were synthesized, characterized, and immobilized on membranes to form supported ionic liquid membranes. The supported ionic liquid membranes were characterized by SEM. The initial transmembrane pressures were investigated for each type of impregnated membrane. The CO 2 /CH 4 single gas and mixed gas permeability (CO 2 and CH 4) have been investigated. The results showed that the CO 2 /CH 4 ideal selectivities and mixed gas selectivities reached 15.45-23.9 and 13.91-22.82, respectively (equivalent to separation yields of 93.3-95.98 %). The 1-alkyl-3-methylimidazolium acetate impregnated membrane leads to a slightly lower CO 2 /CH 4 selectivity, however, this ionic liquid is stable, free of halogen and has a low price. The impregnated membranes prepared from polyvinylidene fluoride are more stable than those from polyethersulfone support, and have a higher affinity for CO 2 compared to other gas. The obtained high CO 2 /CH 4 selectivities indicate that immobilized membranes can be used for CO 2 separation processes.

show abstract

Solubility and diffusivity of H2 and CO2 in the ionic liquid [bmim][PF6]

Cited by 18 publications

References 40 publications

Measuring Diffusion and Solubility of Slightly Soluble Gases in [C_nMIM][NTf₂] Ionic Liquids

Measuring Diffusion and Solubility of Slightly Soluble Gases in [C_nMIM][NTf₂] Ionic Liquids

Conceptual Membraneless Fuel Cell Device Based On Ionic Liquid|Water Interface

Synthesis, Characterization, and Impregnation of Some Ionic Liquids on Polymer Membrane for Separation of Carbon Dioxide from Its Mixture with Methane

Contact Info

Product

Resources

About

Solubility and diffusivity of H2 and CO2 in the ionic liquid [bmim][PF6]

Cited by 18 publications

References 40 publications

Measuring Diffusion and Solubility of Slightly Soluble Gases in [CnMIM][NTf2] Ionic Liquids

Measuring Diffusion and Solubility of Slightly Soluble Gases in [CnMIM][NTf2] Ionic Liquids

Conceptual Membraneless Fuel Cell Device Based On Ionic Liquid|Water Interface

Synthesis, Characterization, and Impregnation of Some Ionic Liquids on Polymer Membrane for Separation of Carbon Dioxide from Its Mixture with Methane

Contact Info

Product

Resources

About

Measuring Diffusion and Solubility of Slightly Soluble Gases in [C_nMIM][NTf₂] Ionic Liquids

Measuring Diffusion and Solubility of Slightly Soluble Gases in [C_nMIM][NTf₂] Ionic Liquids