Carbon Dioxide Capture by Aqueous Ionic Liquid Solutions

Simon, Nathália Marcolin; Zanatta, Marcileia; Santos, Francisco P. dos; Corvo, Marta C.; Cabrita, Eurico J.; Dupont, Jaı̈rton

doi:10.1002/cssc.201701044

Cited by 80 publications

(74 citation statements)

References 58 publications

(189 reference statements)

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“…Especially in the case of the anion OAc, strong interactions with water have been detected without disruption of the IL organization in ion pairs (as demonstrated by HOESY experiments) ,. As previously reported, and reinforced here, the bicarbonate obtained by CO 2 reacting with water can be observed by 13 C NMR experiment ( ca 160 ppm, see Figure a). According to these data, we can appoint this group as cationic/anionic influencers .…”

Section: Resultssupporting

confidence: 88%

“…It is worth mentioning that, in addition to the other effects previously discussed, all the ILs investigated (Table ) perform physisorption, although dissolved CO 2 has not been observed by 13 C NMR, probably due to the small natural abundance of 13 C …”

Section: Resultsmentioning

confidence: 81%

“…[15], [16] In this case, the IL structure suffers only small changes due to CO 2 solvation without disrupting the hydrogen bond contact ion pairs suggesting that this may be controlling the CO 2 solubilisation . d) chemical interaction ‐ common in amine solutions (to form carbamates) and ImILs with carboxylate anions (by the activation of the C2 position in dialkyl imidazolium ILs, followed by reaction between the C2 of the imidazolium ring and the CO 2 ); e) water influence – recently a few reports demonstrated that the formation of bicarbonate in hydrated ILs can increment the gas solubility, by reaction between CO 2 and residual water in the IL ,…”

Section: Introductionmentioning

confidence: 99%

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Cation−Anion−CO₂ Interactions in Imidazolium‐Based Ionic Liquid Sorbents

et al. 2018

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A series of functionalized N-alkylimidazolium based ionic liquids (ImILs) were designed, through anion (carboxylates and halogenated) and cation (N-alkyl side chains) structural modifications, and studied as potential sorbents for CO . The sorption capacities of as prepared bare ImILs could be enhanced from 0.20 to 0.60 molar fraction by variation of cation-anion-CO and IL-CO -water interaction. By combining NMR spectroscopy with molecular dynamics simulations, a good description of interactions between ImIL and CO can be obtained. Three types of CO sorption modes have been evidenced depending on the structure of the ImIL ion pair: Physisorption, formation of bicarbonate, and covalent interaction through the nucleophilic addition of CO to the cation or anion. The highest CO sorption capacity was observed with the ImIL containing the 1-n-butyl-3-methylimidazolium cation associated with the carboxylate anions (succinate and malonate). This study provides helpful clues for better understanding the structure-activity relationship of this class of materials and the ion pair influence on CO capture.

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Section: Resultssupporting

confidence: 88%

Section: Resultsmentioning

confidence: 81%

Section: Introductionmentioning

confidence: 99%

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Cation−Anion−CO₂ Interactions in Imidazolium‐Based Ionic Liquid Sorbents

et al. 2018

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“…The recent literature has also revealed remarkable insights into the interactions of CO 2 with ILs. ILs containing basic anions (such as imidazolate and triazolate) or dialkylimidazolium cations (usually associated with the acetate anion) can covalently interact with CO 2 , yielding carbamates and carboxylates, respectively (Scheme ) . It has been proposed that H + ions released during the formation of imidazolium carbonates (Scheme B) may act as a source of H + ions during electroreduction of CO 2 .…”

Section: Introductionsupporting

confidence: 86%

Efficient Electrocatalytic CO₂Reduction Driven by Ionic Liquid Buffer‐Like Solutions

et al. 2019

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Electrocatalysis of CO2 reduction in aqueous electrolytes containing the ionic liquid (IL) 1‐n‐butyl‐2,3‐dimethylimidazolium acetate ([BMMIm][OAc]) and DMSO proceeded at low overpotentials (−0.9 V vs. Ag/AgCl) at commercially‐available Au electrodes, with high selectivity for CO production (58 % faradaic efficiency at −1.6 V vs. Ag/AgCl). 0.43 mol CO2 per mol IL could be absorbed into the electrolyte at atmospheric pressure, forming bicarbonate and providing a constant supply of dissolved CO2 to the surface of the electrode. Electrocatalysis of CO2 reduction in the electrolyte was facilitated by stabilization of CO2 radical anions by the imidazolium cations of the IL and buffer‐like effects with bicarbonate.

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“…However, the low concentration of hydroxide ion (OH − ) and poor conductivity of neutral electrolytes affect the catalytic activity of MnO x catalysts 15 . Also, the low zincate solubility of neutral electrolytes would make the passivation issue even worse 16 .…”

Section: Introductionmentioning

confidence: 99%

Discharge Performance of Zinc-Air Flow Batteries Under the Effects of Sodium Dodecyl Sulfate and Pluronic F-127

Hosseini

Lao-atiman

Han

et al. 2018

Sci Rep

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Zinc-air batteries are a promising technology for large-scale electricity storage. However, their practical deployment has been hindered by some issues related to corrosion and passivation of the zinc anode in an alkaline electrolyte. In this work, anionic surfactant sodium dodecyl sulfate (SDS) and nonionic surfactant Pluronic F-127 (P127) are examined their applicability to enhance the battery performances. Pristine zinc granules in 7 M KOH, pristine zinc granules in 0–8 mM SDS/7 M KOH, pristine zinc granules in 0–1000 ppm P127/7 M KOH, and SDS coated zinc granules in 7 M KOH were examined. Cyclic voltammograms, potentiodynamic polarization, and electrochemical impedance spectroscopy confirmed that using 0.2 mM SDS or 100 ppm P127 effectively suppressed the anode corrosion and passivation. Nevertheless, direct coating SDS on the zinc anode showed adverse effects because the thick layer of SDS coating acted as a passivating film and blocked the removal of the anode oxidation product from the zinc surface. Furthermore, the performances of the zinc-air flow batteries were studied. Galvanostatic discharge results indicated that the improvement of discharge capacity and energy density could be sought by the introduction of the surfactants to the KOH electrolyte. The enhancement of specific discharge capacity for 30% and 24% was observed in the electrolyte containing 100 ppm P127 and 0.2 mM SDS, respectively.

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Carbon Dioxide Capture by Aqueous Ionic Liquid Solutions

Cited by 80 publications

References 58 publications

Cation−Anion−CO₂ Interactions in Imidazolium‐Based Ionic Liquid Sorbents

Cation−Anion−CO₂ Interactions in Imidazolium‐Based Ionic Liquid Sorbents

Efficient Electrocatalytic CO₂Reduction Driven by Ionic Liquid Buffer‐Like Solutions

Discharge Performance of Zinc-Air Flow Batteries Under the Effects of Sodium Dodecyl Sulfate and Pluronic F-127

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Carbon Dioxide Capture by Aqueous Ionic Liquid Solutions

Cited by 80 publications

References 58 publications

Cation−Anion−CO2 Interactions in Imidazolium‐Based Ionic Liquid Sorbents

Cation−Anion−CO2 Interactions in Imidazolium‐Based Ionic Liquid Sorbents

Efficient Electrocatalytic CO2Reduction Driven by Ionic Liquid Buffer‐Like Solutions

Discharge Performance of Zinc-Air Flow Batteries Under the Effects of Sodium Dodecyl Sulfate and Pluronic F-127

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Product

Resources

About

Cation−Anion−CO₂ Interactions in Imidazolium‐Based Ionic Liquid Sorbents

Cation−Anion−CO₂ Interactions in Imidazolium‐Based Ionic Liquid Sorbents

Efficient Electrocatalytic CO₂Reduction Driven by Ionic Liquid Buffer‐Like Solutions