Solubility of CO2 and H2S in the ionic liquid 1-ethyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate

Jalili, Amir Hossein; Shokouhi, Mohammad; Maurer, Gerd; Hosseini-Jenab, Masih

doi:10.1016/j.jct.2013.07.022

Cited by 122 publications

(49 citation statements)

References 40 publications

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“…Tables S6 and S7 in the Supporting Information summarizes the Henry's constants of gases and ideal selectivities of gas pairs in other physical solvents reported in the literature, including normal ILs and traditional organic solvents . It is found that the solubilities of H 2 S and CO 2 in ChCl + urea mixtures are similar to those in PC but inferior to most other physical solvents.…”

Section: Resultsmentioning

confidence: 99%

Thermodynamic and molecular insights into the absorption of H₂S, CO₂, and CH₄ in choline chloride plus urea mixtures

et al. 2019

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Deep eutectic solvents (DESs) are a class of promising media for gas separation. In order to examine the potential application of DESs for natural gas upgrading, the solubilities of H2S, CO2, and CH4 in choline chloride (ChCl) plus urea mixtures were measured in this work. The solubility data were correlated with Henry's law equation to calculate the thermodynamic properties of gas absorption processes, such as Henry's constants and enthalpy changes. Grand‐canonical Monte Carlo simulations and quantum chemistry calculations were also performed to examine the mechanism of gas absorption processes. It is found that the absorption of H2S in ChCl + urea mixtures is governed by the hydrogen‐bond interaction between Cl of ChCl and H of H2S, whereas the absorption of CO2 and CH4 in ChCl+urea mixtures is governed by the free volume of solvents. Based on the different behavior of gas absorption, high H2S/CO2, H2S/CH4, and CO2/CH4 selectivities can be achieved by adjusting the ratio of ChCl/urea in mixtures.

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Section: Resultsmentioning

confidence: 99%

Thermodynamic and molecular insights into the absorption of H₂S, CO₂, and CH₄ in choline chloride plus urea mixtures

et al. 2019

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“…The typeo fs alt and the molar ratio of salt/HBD highly affects the CO 2 absorption capacity.F or example, the absorption capacityo fC hCl-diethanolamine( 1:6) and tetrabutylammonium bromide-diethanolamine (1:6) at 298 Ka nd 1MPa is 0.0408 and 0.0373 g CO 2 g À1 DES ), respectively. [199] Scheme5.Mechanism for superbase-promoted CO 2 capture using ataskspecific DES.A dapted with permission from Ref. [197].…”

Section: Discussionmentioning

confidence: 99%

Carbon Dioxide Capture with Ionic Liquids and Deep Eutectic Solvents: A New Generation of Sorbents

2016

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High cost and high energy penalty for CO uptake from flue gases are important obstacles in large-scale industrial applications, and developing efficient technology for CO capture from technical and economic points is crucial. Ionic liquids (ILs) show the potential for CO separation owing to their inherent advantages, and have been proposed as alternatives to overcome the drawbacks of conventional sorbents. Chemical modification of ILs to improve their performance in CO absorption has received more attention. Deep eutectic solvents (DESs) as a new generation of ILs are considered as more economical alternatives to cope with the deficiencies of high cost and high viscosity of conventional ILs. This Review discusses the potential of functionalized ILs and DESs as CO sorbents. Incorporation of CO -philic functional groups, such as amine, in cation and/or anion moiety of ILs can promot their absorption capacity. In general, the functionalization of the anion part of ILs is more effective than the cation part. DESs represent favorable solvent properties and are capable of capturing CO , but the research work is scarce and undeveloped compared to the studies conducted on ILs. It is possible to develop novel DESs with promising absorption capacity. However, more investigation needs to be carried out on the mechanism of CO sorption of DESs to clarify how these novel sorbents can be adjusted and fine-tuned to be best tailored as optimized media for CO capture.

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“…Furthermore, the low heat capacity of ILs (normally lower than 2 J·g −1 ·K −1 ) can potentially reduce the energy consumption of desorption process . A number of literature have reported the solubilities of H 2 S and CO 2 in various normal ILs as physical absorbents, showing that the Henry's law constants of H 2 S in normal ILs are generally in the range of 2∼4 MPa and the ideal selectivities of H 2 S/CO 2 are generally in the range of 2∼4 …”

Section: Introductionmentioning

confidence: 99%

Hydrophobic protic ionic liquids tethered with tertiary amine group for highly efficient and selective absorption of H₂S from CO₂

et al. 2016

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Developing absorbents with both high absorption capacity of H 2 S and large selectivity of H 2 S/CO 2 is very important for natural gas sweetening process. To this end, a class of novel hydrophobic protic ionic liquids (ILs) containing free tertiary amine group as functional site for the absorption of H 2 S were designed in this work. They were facilely synthesized through a simple neutralization-metathesis methodology by utilizing diamine compounds and bis(trifluoromethylsulfonyl)imide as the building blocks for cation and anion, respectively. Impressively, the solubility of H 2 S can reach 0.546 mol mol 21 (1 bar) and 0.225 mol mol 21 (0.1 bar), and the selectivity of H 2 S/CO 2 can reach 37.2 (H 2 S solubility at 1 bar vs. CO 2 solubility at 1 bar) and 15.4 (H 2 S solubility at 0.1 bar vs. CO 2 solubility at 1 bar) in the hydrophobic protic ILs at 298.2 K. Comparing the hydrophobic protic ILs with other absorbents justifies their superior performance in the selective absorption of H 2 S from CO 2 .

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Solubility of CO2 and H2S in the ionic liquid 1-ethyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate

Cited by 122 publications

References 40 publications

Thermodynamic and molecular insights into the absorption of H₂S, CO₂, and CH₄ in choline chloride plus urea mixtures

Thermodynamic and molecular insights into the absorption of H₂S, CO₂, and CH₄ in choline chloride plus urea mixtures

Carbon Dioxide Capture with Ionic Liquids and Deep Eutectic Solvents: A New Generation of Sorbents

Hydrophobic protic ionic liquids tethered with tertiary amine group for highly efficient and selective absorption of H₂S from CO₂

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Solubility of CO2 and H2S in the ionic liquid 1-ethyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate

Cited by 122 publications

References 40 publications

Thermodynamic and molecular insights into the absorption of H2S, CO2, and CH4 in choline chloride plus urea mixtures

Thermodynamic and molecular insights into the absorption of H2S, CO2, and CH4 in choline chloride plus urea mixtures

Carbon Dioxide Capture with Ionic Liquids and Deep Eutectic Solvents: A New Generation of Sorbents

Hydrophobic protic ionic liquids tethered with tertiary amine group for highly efficient and selective absorption of H2S from CO2

Contact Info

Product

Resources

About

Thermodynamic and molecular insights into the absorption of H₂S, CO₂, and CH₄ in choline chloride plus urea mixtures

Thermodynamic and molecular insights into the absorption of H₂S, CO₂, and CH₄ in choline chloride plus urea mixtures

Hydrophobic protic ionic liquids tethered with tertiary amine group for highly efficient and selective absorption of H₂S from CO₂