Absorption of Carbon Dioxide in Two Binary Mixtures of Ionic Liquids

Pinto, Alicia M.; Rodríguez, Héctor; Colón, Yamil J.; Arce, Alberto; Soto, Ana

doi:10.1021/ie303238h

Cited by 104 publications

(87 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The k H value decreased as the molar ratio of [C 2 MIM][Tf 2 N] increased, and thus the absorption capacity increased by increasing the content of the fluorinated IL. Almost the same behavior was observed for binary mixtures of imidazolium‐based ILs, such as [C 2 MIM][Tf 2 N]/[C 2 MIM][EtSO 4 ] and [C 2 MIM][Tf 2 N]/[C 4 MIM][EtSO 4 ] . The CO 2 solubility increased by increasing the content of [C 2 MIM][Tf 2 N].…”

Section: Ionic Liquidsmentioning

confidence: 99%

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

2016

View full text Add to dashboard Cite

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.

show abstract

Section: Ionic Liquidsmentioning

confidence: 99%

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

2016

View full text Add to dashboard Cite

show abstract

“…Therefore, ionic liquids (ILs) catch our attention due to their unique properties, such as high thermal and chemical stability, negligible vapor pressures and high designability as a result of nearly unlimited number of possible combinations of different anion-cation pairs. [43][44][45][46][47][48][49][50] A large number of ILs have been employed for the potential absorption separation of C 2 H 2 and C 2 H 4 . Zhao et al 51 have screened a new class of tetraalkylphosphonium ILs with high capacity and selectivity (0.476 mol/mol IL, selectivity up to 21.4) via a rapid screening method based on COSMO-RS.…”

Section: Introductionmentioning

confidence: 99%

Efficient adsorption separation of acetylene and ethylene via supported ionic liquid on metal‐organic framework

et al. 2016

View full text Add to dashboard Cite

Ionic liquid (IL) supported metal‐organic framework (MOF) was utilized to efficiently separate acetylene from ethylene. A common IL, 1‐butyl‐3‐methylimidazolium acetate ([Bmim][OAc]), was encapsulated into a hydrothermally stable MOF, namely MIL‐101(Cr). Characterization techniques including FTIR, Powder X‐ray diffraction, BET, and thermal gravimetric analysis were used to confirm successful encapsulation of the IL within MIL‐101(Cr). Adsorption isotherms of acetylene and ethylene in the IL‐encapsulated MOF were tested. From the results, the MOF composite retained a relatively high adsorption capacity. Remarkably, the adsorption selectivity of acetylene/ethylene has dramatically increased from 3.0 to 30 in comparison with the parent MIL‐101(Cr). Furthermore, the potential of industrial practice was examined by breakthrough and regeneration experiments. It not only satisfies the industrial production of removal of low level of acetylene from ethylene, but also is notably stable during the adsorption‐desorption process. The high designability of ILs combined with richness of MOFs’ structures exploits a novel blueprint for gas separation. © 2016 American Institute of Chemical Engineers AIChE J, 63: 2165–2175, 2017

show abstract

“…Moving beyond two‐ion ILs, several researchers have recently turned their attention to double salt ionic liquids (DSILs) which are composed of more than one cation and/or anion . As the most straightforward approach to obtain such DSILs is mixing two different ILs together, they are treated as “IL mixtures” in many studies (in the following all ILs refer to two‐ion ones if they are not particularly specified) .…”

Section: Introductionmentioning

confidence: 99%

Rational design of double salt ionic liquids as extraction solvents: Separation of thiophene/n‐octane as example

Song

Zhou

et al. 2019

AIChE Journal

View full text Add to dashboard Cite

Although double salt ionic liquids (DSILs) offer significant advantages over classical twoion ionic liquids as separation solvents, relevant studies are still scarce and a systematic DSIL selection method is thus highly desirable. In this contribution, a rational method for designing DSILs as extraction solvents is proposed and exemplified by the thiophene/ n-octane separation. The effects of additional degrees of freedom for DSIL design (i.e., double cations and/or anions and the ion ratio) on the thermodynamic properties are first analyzed by COSMO-RS. Then, a multilevel DSIL design method combining the prediction of infinite dilution thermodynamic properties, the estimation of physical properties, the evaluation of phase equilibrium behavior, and the experimental validation is proposed. By applying this method, [C 2 MIm][OAc] x [NO 3 ] 1-x (x = [0, 1]) and [C 2 MIm] [OAc] x [SCN] 1-x (x = [0.70, 1]) are identified as promising DSIL solvents for the thiophene/ n-octane separation. Correspondingly, the liquid-liquid equilibria of {DSILs + thiophene + n-octane} with the designed DSILs are experimentally studied. K E Y W O R D S COSMO-RS, double salt ionic liquids, liquid-liquid equilibrium, solvent design, thiophene/ n-octane separation 1 | INTRODUCTION During the past decades, ionic liquids (ILs) have sparked significant interest for application in various separation processes due to their overwhelming advantages over conventional organic solvents, such as negligible vapor pressure, broad liquid range, designable and tunable character, and so on. 1-10 However, as known to all, various cationanion combinations can lead to very different physical and thermodynamic properties, making the selection of ILs the most crucial task for the development of IL-based separation processes. 4-10 A large number of experimental and theoretical studies have been reported on the identification of suitable ILs for different separation processes. 7-25 Particularly, several research groups have employed COSMO-based activity coefficient models 12-19 or the UNIFAC-IL model 20-25 to perform computational screening and design of ILs as separation solvents. Because of the predictive character of these thermodynamic models, the separation performance of ILs that have not been experimentally covered can be estimated and thus the identification of suitable solvent candidates in a large range is possible. Despite the progress made, the selection of practically attractive IL for a specific process is still challenging as in many cases very few ILs can satisfy different desirable properties simultaneously. For instance, when screening ILs as extractive desulfurization solvent, Song et al found that only 831 of the initial 36,260 cation-anion combinations meet the thermodynamic property requirements, among which only 15 satisfy the physical property constraints. 16 Conceivably, if more restrictions such as easy preparation, commercial availability, low cost, and so on of ILs are considered, the number of feasible solvents will be further reduced...

show abstract

Absorption of Carbon Dioxide in Two Binary Mixtures of Ionic Liquids

Cited by 104 publications

References 54 publications

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

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

Efficient adsorption separation of acetylene and ethylene via supported ionic liquid on metal‐organic framework

Rational design of double salt ionic liquids as extraction solvents: Separation of thiophene/n‐octane as example

Contact Info

Product

Resources

About