Efficient CO2 absorption by azolide-based deep eutectic solvents

Cui, Ge; Lv, Meng; Yang, Dezhong

doi:10.1039/c8cc10085c

Cited by 102 publications

(70 citation statements)

References 44 publications

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“…Actually, the 13 C NMR spectrum of the resulting mixture indicates that the carbonation of the system leads to two products (Figure 2): not only potassium bicarbonate (carbon peak around 167 ppm), as confirmed from the reference spectrum of KHCO3 in pure EG (Figure S2), but also another species with three different carbon nuclei. This species is the carbonate of ethylene glycol [36,37] derived from the deprotonation of EG by the hydroxide. The low relative abundance of the latter with respect to the peak of EG is an additional, indirect confirmation that the equilibrium ( 1) is shifted to the left.…”

Section: Resultsmentioning

confidence: 99%

Low-Cost Temperature Transition Mixtures (TTM) Based on Ethylene Glycol/potassium Hydroxide as Reversible CO2 Sorbents

Costamagna¹,

Micheli²,

Canale³

et al. 2021

Preprint

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A low-cost Transition Temperature Mixture (TTM) has been synthesized by mixing ethylene glycol and potassium hydroxide as a new non-aqueous CO2 sorbent. Boric acid has been added to ensure the reversibility of the system and a small amount of water to modulate the viscosity and optimize the performances. The resulting mixtures have been characterized in terms of viscosity, conductivity and density over temperature (therefore ionicity via Walden plots) and the effect of temperature, pressure and the kinetics of the absorption have been evaluated. Under optimized conditions, the four-component mixture EG/KOH/BA/H2O 3:1:1:3 can absorb 24 gCO2/kgsorbent in 30 minutes at 35°C at 1 atm (59 after 4 h) and 60 gCO2/kgsorbent in 30 minutes at high pressure (10 and 20 atm, 80 gCO2/kgsorbent after 50 min), while the desorption is quantitative after 30 minutes at only 60°C under a gentle N2 flow. The system is robust enough to ensure multiple absorption/desorption cycles.

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Section: Resultsmentioning

confidence: 99%

Low-Cost Temperature Transition Mixtures (TTM) Based on Ethylene Glycol/potassium Hydroxide as Reversible CO2 Sorbents

Costamagna¹,

Micheli²,

Canale³

et al. 2021

Preprint

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show abstract

“…Azole-based functionalized DESs are another kind of functionalized DESs used for the capture of CO 2 . Yang et al [71] absorption. On the basis of NMR and FTIR analysis, they proposed four possible routes, as shown in Figure 5.…”

Section: Azole-based Functionalized Dessmentioning

confidence: 99%

Capture of Acidic Gases from Flue Gas by Deep Eutectic Solvents

et al. 2021

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Up to now, many kinds of deep eutectic solvents (DESs) were investigated for the capture of acidic gases from flue gases. In this review, non-functionalized and functionalized DESs, including binary and ternary DESs, for SO2, CO2 and NO capture, are summarized based on the mechanism of absorption, physical interaction or chemical reaction. New strategies for improving the absorption capacity are introduced in this review. For example, a third component can be introduced to form a ternary DES to suppress the increase in viscosity and improve the CO2 absorption capacity. DESs, synthesized with halogen salt hydrogen bond acceptors (HBAs) and functionalized hydrogen bond donors (HBDs), can be used for the absorption of SO2 and NO with high absorption capacities and low viscosities after absorption, due to physicochemical interaction between gases and DESs. Emphasis is given to introducing the absorption capacities of acidic gases in these DESs, the mechanism of the absorption, and the ways to enhance the absorption capacity.

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“…As an alternative, DESs not only have similar properties to ionic liquids, but also have many other advantages, including simple preparation, cheap raw materials, low toxicity, biodegradability and no further purication. 27 Because of these properties, DESs have gradually become a new type of green solvents and catalysts, and have been widely used in biocatalysis, 28,29 extraction, 30,31 carbon dioxide capture, [32][33][34] biomedical applications, 35 material synthesis [36][37][38] and other elds. In recent decades, DESs as a reaction medium have attracted widespread attention, making them have broad application prospects in industrial production.…”

Section: Introductionmentioning

confidence: 99%

Degradation of polycarbonate to produce bisphenol A catalyzed by imidazolium-based DESs under metal-and solvent-free conditions

Huang

Wang

et al. 2021

RSC Adv.

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Efficient CO₂ absorption by azolide-based deep eutectic solvents

Abstract: Azolide-based deep eutectic solvents exhibit a high CO2 absorption capacity by forming carbonate species.

Cited by 102 publications

References 44 publications

Low-Cost Temperature Transition Mixtures (TTM) Based on Ethylene Glycol/potassium Hydroxide as Reversible CO2 Sorbents

Low-Cost Temperature Transition Mixtures (TTM) Based on Ethylene Glycol/potassium Hydroxide as Reversible CO2 Sorbents

Capture of Acidic Gases from Flue Gas by Deep Eutectic Solvents

Degradation of polycarbonate to produce bisphenol A catalyzed by imidazolium-based DESs under metal-and solvent-free conditions

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