High-Pressure Phase Behavior of Carbon Dioxide with Ionic Liquids: 1-Alkyl-3-methylimidazolium Trifluoromethanesulfonate

Shin, Eun-kyoung; Lee, Byung‐Chul

doi:10.1021/je8000443

Cited by 122 publications

(71 citation statements)

References 21 publications

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“…The CO 2 mole fraction at which the cloud point behavior was observed depended on the system. This phenomenon can be explained in the following manner, as already discussed in our previous publication [13]. When the CO 2 solubility in ionic liquid is measured in our experiments, the pressure is slowly reduced until the phase separation occurs from the single-phase solution where CO 2 is dissolved in the ionic liquid phase.…”

Section: June 2015supporting

confidence: 61%

“…The rational design of the corresponding absorption system suitable for industrial scale-up purposes will require a precise knowledge of the physical equilibrium between CO 2 and the ionic liquid. A vast number of experimental works in the literature deal with CO 2 solubility in various kinds of ionic liquids at different temperature and pressure conditions [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27].…”

Section: June 2015mentioning

confidence: 99%

“…A schematic diagram of the experimental apparatus and a detailed description of the experimental procedure are given in our previous publications [12,13,[22][23][24]27]. The apparatus has a view cell equipped with a sapphire window and a movable piston, a pressure generator (High Pressure Equipment Co. model 50-6-15), a borescope (Olympus model R080-044-000-50), a magnetic stirring system, and an air bath.…”

Section: Apparatus and Proceduresmentioning

confidence: 99%

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High-pressure solubility of carbon dioxide in pyrrolidinium-based ionic liquids: [bmpyr][dca] and [bmpyr][Tf2N]

Lee

Nam

2015

Korean J. Chem. Eng.

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Solubility data of carbon dioxide (CO 2 ) in two pyrrolidinium-based ionic liquids: 1-butyl-1-methylpyrrolidinium dicyanamide ([bmpyr][dca]) and 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide ([bmpyr] [Tf 2 N]) are presented at pressures up to about 30 MPa and temperatures from 303.2 K to 343.2 K. The solubility was determined by measuring bubble or cloud point pressures of mixtures of CO 2 and ionic liquid using a high-pressure equilibrium apparatus equipped with a variable-volume view cell. The CO 2 solubility in the ionic liquid in terms of the mole fraction or the molality increased with the increase of the equilibrium pressure at a given temperature, but decreased with the increase of temperature at a given pressure. At a given temperature, the mole fraction of CO 2 dissolved in the ionic liquid increased rapidly as pressure increased. CO 2 solubility in the mole fraction almost reached saturation around 0.65 for [bmpyr][dca] and around 0.8 for [bmpyr][Tf 2 N], respectively. The experimental data for the CO 2 + ionic liquid systems were correlated using the Peng-Robinson equation of state (PR-EoS). The mixing rules of the WongSandler type rather than the classical mixing rules of the van der Waals type were coupled with the PR-EoS. The resulting modeling approach proved to be able to correlate the CO 2 solubilities in aforementioned ionic liquids over the aforementioned range of temperature and pressure within 5% average deviations.

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Section: June 2015supporting

confidence: 61%

Section: June 2015mentioning

confidence: 99%

Section: Apparatus and Proceduresmentioning

confidence: 99%

See 1 more Smart Citation

High-pressure solubility of carbon dioxide in pyrrolidinium-based ionic liquids: [bmpyr][dca] and [bmpyr][Tf2N]

Lee

Nam

2015

Korean J. Chem. Eng.

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“…1 shows a schematic diagram of the experimental apparatus used in this work. A detailed description of the experimental apparatus and procedure can be obtained from our previous publications [12][13][14][15]. The apparatus consists of a view cell equipped with a sapphire window and a movable piston, a pressure generator, a borescope, a video monitor, a magnetic stirring system, and an air bath.…”

Section: Apparatusmentioning

confidence: 99%

High-pressure phase behavior of binary and ternary mixtures containing ionic liquid [C6-mim][Tf2N], dimethyl carbonate and carbon dioxide

Ahn

Lee

Lim

et al. 2010

Fluid Phase Equilibria

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“…The length of alkyl-side chain of imidazolium based cations also affects the CO 2 solubility (Table 1). Fluoro-substituted side chains increase CO 2 uptake greatly rather than fluorine-nonsubstituted side chains but substantially this causes [29] increase in the viscosity [30][31][32]. Anion appears to be of more powerful effect on the gas solubility than cations.…”

Section: Ionic Liquidsmentioning

confidence: 93%

The Absorption Kinetics of CO2 into Ionic Liquid—CO2 Binding Organic Liquid and Hybrid Solvents

Orhan

Ume²,

Alper

2016

Green Energy and Technology

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Carbon dioxide (CO 2 ) capture is a global concern because of its effect on climate change especially as regards to global warming. Among greenhouse gases, CO 2 is the most abundant with high concentration released from post combustion processes into the atmosphere. For instance, the volume of CO 2 emission from thermal power plants, petroleum refineries, petrochemical plants, hydrogen and cement factories has become one of the top important global concerns nowadays. In order to capture post-combustion CO 2 and securely store it way or to produce useful products from it, it requires separation of CO 2 from flue gas stream. Industrially, it is generally accepted that the most appropriate method that can be applied commercially to capture CO 2 involves absorbing it with a reversible reaction from gas streams into aqueous amine especially monoethanolamine. Although, CO 2 -aqueous amine process is accepted as a mature technology but its absorption/desorption systems are the subject of several studies as the process is energy-intensive among other issues. In view of the shortfalls of CO 2 -aqueous amine systems and the greater societal concern to control the amount of CO 2 released to the environment from industrial sources to abate its effects, research for alternative viable solvent systems becomes of high interest to researchers as well as industrialists. Hence, this chapter is mainly to focus on highlighting and discussing relevant advanced solvent systems for CO 2 capture. Among the novel solvents or technology worthy of discussion here include use of organic solvents consisting of an amidine or a guanidine and a linear alcohol, such as 1-hexanol, instead of aqueous amines. In this case, CO 2 loaded solvent could be regenerated at 90-100°C which is much lower than the boiling point of the solvent and as a result, sufficient drop in energy requirements could be

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High-Pressure Phase Behavior of Carbon Dioxide with Ionic Liquids: 1-Alkyl-3-methylimidazolium Trifluoromethanesulfonate

Cited by 122 publications

References 21 publications

High-pressure solubility of carbon dioxide in pyrrolidinium-based ionic liquids: [bmpyr][dca] and [bmpyr][Tf2N]

High-pressure solubility of carbon dioxide in pyrrolidinium-based ionic liquids: [bmpyr][dca] and [bmpyr][Tf2N]

High-pressure phase behavior of binary and ternary mixtures containing ionic liquid [C6-mim][Tf2N], dimethyl carbonate and carbon dioxide

The Absorption Kinetics of CO2 into Ionic Liquid—CO2 Binding Organic Liquid and Hybrid Solvents

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