Phase Behaviour of Gases in Ionic Liquids

Shiflett, Mark B.; Yokozeki, A.

doi:10.1002/9781118434987.ch11

Cited by 25 publications

(41 citation statements)

References 122 publications

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“…Similar to our previous observations [9,[24][25][26][27][28][29][30][31] and work by Costa Gomes et al [32] the solubility of perfluorinated compounds [30][31][32] in ionic liquids (i.e. fluorinated ionic liquids) is much lower than hydrofluorocarbons due to the lack of hydrogen-bonding.…”

Section: Resultssupporting

confidence: 83%

Separation of tetrafluoroethylene and carbon dioxide using ionic liquids

Shiflett¹,

Shiflett

Yokozeki³

2011

Separation and Purification Technology

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Section: Resultssupporting

confidence: 83%

Separation of tetrafluoroethylene and carbon dioxide using ionic liquids

Shiflett¹,

Shiflett

Yokozeki³

2011

Separation and Purification Technology

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“…All recycles were done by sparging a dry gas (N 2 or air) through the stirred liquids for 15 min. 56,89 Summary and conclusions Mole ratio of the recycled absorbents have an associated error of ±0.3.…”

Section: Selection Of the Best Systemmentioning

confidence: 99%

Carbon dioxide uptake from natural gas by binary ionic liquid–water mixtures

et al. 2015

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Carbon dioxide solubility in a set of carboxylate ionic liquids formulated with stoicheiometric amounts of water is found to be significantly higher than for other ionic liquids previously reported. This is due to synergistic chemical and physical absorption. The formulated ionic liquid/water mixtures show greatly enhanced carbon dioxide solubility relative to both anhydrous ionic liquids and aqueous ionic liquid solutions, and are competitive with commercial chemical absorbers, such as activated N-methyldiethanolamine or monoethanolamine. † CCDC 1055905 and 1055906. For crystallographic data in CIF or other electronic format see

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“…In addition to the above-mentioned adsorption studies, we have investigated the solubility (VLE: vapour-liquid equilibria) of R-23 in ionic liquid 1-octyl-3-methylimidazolium 1, 1, 2, 2-tetrafluoroethanesulfonate ([omim][TFES]) at approximately 298 and 323 K up to 2 MPa. VLE data have been correlated well with our generic Redlich-Kwong (RK) equation of state (EOS) (Shiflett and Yokozeki 2013). The experimental results are compared with the present adsorption data on zeolites in the R-23 molality versus pressure plot.…”

Section: Introductionmentioning

confidence: 82%

“…Schematic diagram of Hiden Isochema IGA003 gravimetric microbalance. Symbols: arrow F B indicates direction due to buoyancy force on sample side of balance, arrow F W indicates direction of weight due to gravity on sample side of balance, additional symbols described in Shiflett and Yokozeki (2013).…”

Section: Vle and Adsorption Measurements Using A Gravimetric Microbalmentioning

confidence: 99%

“…R-23 can be captured and removed from the R-22 process using the proper sorbent materials. In an earlier study, we have examined such a possibility by using the ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim][PF 6 ]) as an absorbing solvent (Yokozeki and Shiflett 2006). In the present work, we study the adsorption behaviour of R-23 with commercial zeolites 5A, LSX and 13X at about 298 and 323 K up to 2 MPa.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of the Sorption of Trifluoromethane (R-23) on Zeolites and in an Ionic Liquid

Shiflett

Corbin

Yokozeki

2013

Adsorption Science & Technology

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In this study, trifluoromethane (R-23) has been adsorbed on three zeolites, namely 5A, LSX and 13X, and their adsorption isotherms have been measured at approximately 298 and 323 K using a gravimetric microbalance. All cases belong to the adsorption Type II (one of the six IUPAC classifications), and the adsorption (and desorption) processes are reversible. Three different adsorption models [original Langmuir, multi-site Langmuir and BET equations] have been adopted to analyze the data, with a particular interest in calculating the heat of adsorption (-∆H), which was found to be about 10, 30 and 40 kJ⋅mol-1 for zeolite 5A, LSX and 13X, respectively. These values are within the range of typical physical adsorptions. Solubility of R-23 in ionic liquid 1-octyl-3-methylimidazolium 1,1,2,2-tetrafluoroethanesulfonate ([omim][TFES]) has been measured at approximately 298 and 323 K using the same gravimetric microbalance and the value was compared with the adsorption results. The solubility capacity of R-23 in ionic liquid reaches about 3 mol kg-1 around 2.5 MPa at 298 K, while the adsorption capacity on zeolites becomes around 3 mol kg-1 at around 0.25 MPa (ten times smaller). The adsorption on zeolites took more time than the absorption in the ionic liquid to reach thermodynamic equilibrium.

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Phase Behaviour of Gases in Ionic Liquids

Cited by 25 publications

References 122 publications

Separation of tetrafluoroethylene and carbon dioxide using ionic liquids

Separation of tetrafluoroethylene and carbon dioxide using ionic liquids

Carbon dioxide uptake from natural gas by binary ionic liquid–water mixtures

Comparison of the Sorption of Trifluoromethane (R-23) on Zeolites and in an Ionic Liquid

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