Low-Pressure Solubility of Carbon Dioxide in Room-Temperature Ionic Liquids Measured with a Quartz Crystal Microbalance

Baltus, Ruth E.; Culbertson, Benjamin H.; Dai, Sheng; Luo, Huimin; DePaoli, David W.

doi:10.1021/jp036051a

Cited by 315 publications

(337 citation statements)

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“…The solubility of carbon dioxide in a variety of ILs has been determined at low pressures [1][2][3][4][5][6][7][8][9][10] and high pressures (up to 73 MPa) [11][12][13][14][15][16][17][18][19][20][21][22][23][24]. In particular, the system (carbon dioxide + [C 1 C 2 Im][NTf 2 ]), also investigated in this work, was studied by several authors [7][8][9][10]14,17].…”

Section: Introductionmentioning

confidence: 99%

“…In general, changing the anion of the IL has a larger impact on the gas solubility than modifying the cation [3,6,12,14,15]. The presence of the [NTf 2 ] − anion systematically increases the solubility of carbon dioxide [3,6,12,14] this anion showing a larger affinity for this solute regardless of whether the liquid is based on the imidazolium, pyrrolidinium or ammonium cations [12].…”

Section: Introductionmentioning

confidence: 99%

“…The presence of the [NTf 2 ] − anion systematically increases the solubility of carbon dioxide [3,6,12,14] this anion showing a larger affinity for this solute regardless of whether the liquid is based on the imidazolium, pyrrolidinium or ammonium cations [12]. The effect of changing the cation of the IL on the solubility of gases is less significant [12,15].…”

Section: Introductionmentioning

confidence: 99%

“…The effect of changing the cation of the IL on the solubility of gases is less significant [12,15]. A slight increase of the solubility of carbon dioxide when increasing the alkyl side chain length in the imidazolium cation was observed [6,15,23]. In addition, Anthony et al [12] compared the solubility of carbon dioxide in three ILs containing the anion [NTf 2 ] -and either an imidazolium, an ammonium or a pyrrolidinium cation.…”

Section: Introductionmentioning

confidence: 99%

“…Replacing the imidazolium cation with either the tetraalkylammoinum-based cations resulted in a decrease in the solubility of carbon dioxide of between 15 and 30%. Interestingly, Baltus et al [6] have observed, using a quartz crystal microbalance, a significantly greater carbon dioxide solubility in imidazolium-based ILs having fluorine-substituted cation as compared with the corresponding IL with a nonfluorinated cation. In this case the Henry's constant differs by a factor of seven between ).…”

Section: Introductionmentioning

confidence: 99%

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Solubility of carbon dioxide and ethane in three ionic liquids based on the bis{(trifluoromethyl)sulfonyl}imide anion

Hong

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Solubility of carbon dioxide and ethane in three ionic liquids based on the bis{(trifluoromethyl)sulfonyl}imide anion

Hong

Jacquemin²,

Deetlefs³

et al. 2007

Fluid Phase Equilibria

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Ionic Liquids

Stark¹,

Seddon²

2007

Kirk-Othmer Encyclopedia of Chemical Technology

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This article deals with the literature on ionic liquids, with the focus on nomenclature, preparation, and handling of the second‐generation ionic liquids. In the older (and some current) literature, ionic liquids are sometimes called liquid organic salts, fused salts, molten salts, ionic melts, NAILs (nonaqueous ionic liquids), room‐temperature ionic liquids, OILs (organic ionic liquids) and ionic fluids. Their most prominent feature, namely the potential of tuning their physical properties to suit a particular application, is discussed in detail. In addition, areas in which ionic liquids are already applied, and in which their properties promise favorable application in transition‐metal catalyzed reactions, are reviewed. In recent years, many ionic liquids have emerged as environmentally benign alternatives to volatile organic compounds (VOCs, such as trichloromethane, ethanenitrile and dimethylmethanamide), which cause emissions and effectively damage the ecological balance. The merit of ionic liquids, in this respect, is their negligibly small vapor pressure; therefore they are easily retained in a process. This concept has been realized, especially in preparative chemistry, as shown in many examples in this article: when used as solvents in catalytic processes, separation of the solvent (and the catalyst) from the product is facilitated, and recycling is easily possible.

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Ionic Liquids

Meindersma

Maase

Haan

2007

Ullmann's Encyclopedia of Industrial Chemistry

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The article contains sections titled: 1. Introduction 2 Physical and Chemical Properties 2.1. Introduction 2.2. Melting Point 2.3. Density 2.4. Viscosity 2.5. Thermal Stability 2.6. Electrochemical Window 3 Synthesis/Production 3.1. Introduction 3.2. Synthesis 3.2.1. Lewis Acid‐Based ILs 3.2.2. Anion Metathesis 3.2.3. Synthesis of Chloride Free ILs 3.2.4. Preparation with Microwaves 3.3. Producers of Ionic Liquids 4 Applications 4.1 Potential Applications 4.1.1. Solvents for Synthesis and Catalysis 4.1.1.2 Solvents for Catalysis 4.1.1.3 Polymer Synthesis 4.1.1.4 Biocatalysis 4.1.2. Electrochemical Applications 4.1.3. Analytical Applications 4.1.4. Separations 4.1.4.1 Liquid Separations 4.1.4.2 Gas Separations 4.1.5. Fluid Applications: Thermal Fluids and Lubricants 4.2. Applications in Pilot Plants and Industry 4.2.1. Reactions 4.2.1.1. Acid Scavenging 4.2.1.2. Production of 2,5‐dihydrofuran 4.2.1.3. Chlorination of Alcohols/Cleavage of Ethers 4.2.1.4. Hydrosilylation 4.2.1.5. Fluorination 4.2.1.6. Dimerization and Oligomerization of Olefins 4.2.2. Separations 4.2.2.1 Extractive Distillation 4.2.2.2. Extraction of Aromatic Hydrocarbons 4.2.3. Electroplating/Polishing 4.2.4. ILs as Performance Chemicals 4.2.4.1 Compatibilizers for Pigment Pastes 4.2.4.2. Antistatic Additives for Cleaning Fluids 4.2.5. ILs in Gas Processing 4.2.5.1. Storage of Gases 4.2.5.2. Ionic Compressor 5 Analysis 6 Toxicology and Occupational Health 6.1. (Eco)toxicology 6.2. Mutagenicity 6.3. Safety and Corrosion 7 References The common definition of an ionic liquid (IL), or a room temperature ionic liquid (RTIL), is that it is a liquid composed entirely of ions, which is fluid below 100 °C. Ionic liquids are generally much denser (ρ = 1 − 1.6 g/cm 3 ) and more viscous (η = 10 − 500 mPa · s) than conventional solvents. Ionic liquids can be stable up to temperatures of 500 °C. They can easily be synthesized and the variability of the cation and anion may be used to adjust the properties of the ionic liquids. Therefore, the possibility arises to optimize an ionic liquid for a specific application by stepwise tuning the relevant solvent properties. For this reason ionic liquids have been referred to as “designer solvents”. The potential to use ionic liquids as novel solvents or fluids for a diverse range of applications has become increasingly apparent. The intrinsic nonvolatile nature of ILs provides an opportunity to reduce, or even completely eliminate, hazardous and toxic emissions to the atmosphere, thus providing the promise for significant environmental benefits. In synthesis and catalysis, ILs have been used as solvents (or solvents and catalysts), with the greatest current effort on using the ILs as alternatives to volatile organic compounds (VOCs). Electrochemical studies have utilized the fact that ILs are liquids rather than solids to provide liquid electrolytes without needing to add an additional solvent. Ionic liquids are also used in separations, replacing volatile solvents. The number of applications on pilot‐plant and commercial scale is still limited, but growing. Although ionic liquids are also known as “green solvents”, this is not always true. They can be corrosive, flammable, or toxic. Due to their nonvolatile nature, ionic liquids are generally considered as having a low impact on the environment and human health, and thus recognized as solvents for green chemistry. However, the impact of ionic liquids on aquatic ecosystems is important given their mild to high solubility in water. Before ionic liquids will be widely used in industry, the effects of ILs on the aquatic environment must be known.

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Low-Pressure Solubility of Carbon Dioxide in Room-Temperature Ionic Liquids Measured with a Quartz Crystal Microbalance

Cited by 315 publications

References 32 publications

Solubility of carbon dioxide and ethane in three ionic liquids based on the bis{(trifluoromethyl)sulfonyl}imide anion

Solubility of carbon dioxide and ethane in three ionic liquids based on the bis{(trifluoromethyl)sulfonyl}imide anion

Ionic Liquids

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