CO2 capture with hybrid absorbents of low viscosity imidazolium-based ionic liquids and amine

Xiao, Min; Liu, Helei; Gao, Hongxia; Olson, Wilfred; Liang, Zhiwu

doi:10.1016/j.apenergy.2018.10.103

Cited by 143 publications

(70 citation statements)

References 40 publications

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“…The pH time dependence by CO 2 hydration was observed as the change in the absorbance of the indicator In − to HIn, and the CO 2 hydration rate constant, k obs , was determined by Equation (1). The Zn-bound HCO 3 − was rapidly replaced by H 2 O to regenerate L-Zn-OH 2 .…”

Section: Kinetic Measurements (Stopped-flow Spectrophotometer)mentioning

confidence: 99%

“…CO 2 , which is the main cause of global warming, is being actively studied so as to find more economical ways to capture and store this gas stably [1][2][3]. For capturing CO 2 , amine-based chemosorbents, which are expected to be the first material to be commercialized, are currently under investigation [3][4][5][6][7]. However, these chemosorbents have certain drawbacks, in that they require a high amount of heat for regeneration, are corrosive, and undergo deterioration [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…CA is a bioinorganic enzyme that contains Zn and catalyzes the reversible hydration of CO 2 and the dehydration of HCO 3 − . The observed rate constant of CA is 10 6 M −1 s −1 , because of which, it is the fastest enzyme known to date [11,17,18].…”

Section: Introductionmentioning

confidence: 99%

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Kinetic Study of CO2 Hydration by Small-Molecule Catalysts with A Second Coordination Sphere that Mimic the Effect of the Thr-199 Residue of Carbonic Anhydrase

Park¹,

Lee²

2019

Biomimetics

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Zinc complexes were synthesized as catalysts that mimic the ability of carbonic anhydrase (CA) for the CO2 hydration reaction (H2O + CO2 → H+ + HCO3-). For these complexes, a tris(2-pyridylmethyl)amine (TPA) ligand mimicking only the active site, and a 6-((bis(pyridin-2-ylmethyl)amino)methyl)pyridin-2-ol (TPA-OH) ligand mimicking the hydrogen-bonding network of the secondary coordination sphere of CA were used. Potentiometric pH titration was used to determine the deprotonation ability of the Zn complexes, and their pKa values were found to be 8.0 and 6.8, respectively. Stopped-flow spectrophotometry was used to confirm the CO2 hydration rate. The rate constants were measured to be 648.4 and 730.6 M-1s-1, respectively. The low pKa value was attributed to the hydrogen-bonding network of the secondary coordination sphere of the catalyst that mimics the behavior of CA, and this was found to increase the CO2 hydration rate of the catalyst.

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Section: Kinetic Measurements (Stopped-flow Spectrophotometer)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Kinetic Study of CO2 Hydration by Small-Molecule Catalysts with A Second Coordination Sphere that Mimic the Effect of the Thr-199 Residue of Carbonic Anhydrase

Park¹,

Lee²

2019

Biomimetics

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“…Along with the aeration of CO 2 at 1 L/min, the pH value of NS-NR 2 dispersion dropped rapidly in the first 5 min, after which there were no changes in pH value for 20 min, as shown in Figure S3C, which means that NS-NR 2 dispersion (0.1 wt.%) completely saturated CO 2 at 1 L/min CO 2 gas velocity in 20 min. It is well-known that CO 2 capture is significant influenced by the viscosity of absorbent (Xiao et al, 2019). Figure 6 demonstrates the rheological property of NS-NR 2 dispersion before and after adsorption CO 2 .…”

Section: Co 2 Adsorption and Kinetic Studiesmentioning

confidence: 99%

“…For example, the reaction molar ratio of tertiary amine and CO 2 is 1:1 to formed bicarbonate structure, while the reaction molar ratio of primary amine or secondary amine and CO 2 is 0.5:1 to formed carbamate structure (Sartorl and Savage, 1983). Tertiary amine can be able to generate a bicarbonate due to no hydrogen on nitrogen when reacted with CO 2 and H 2 O, resulting in a better CO 2 adsorption and lower energy depletion for regeneration (Xiao et al, 2016(Xiao et al, , 2019. Moreover, kinetics is important since it can explain the dynamic adsorption of the sorbent, a lot of kinetic models are applied to the CO 2 adsorption property of tertiary amine (Liu et al, 2019b).…”

Section: Introductionmentioning

confidence: 99%

CO2 Capture With Absorbents of Tertiary Amine Functionalized Nano–SiO2

et al. 2020

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To improve CO 2 adsorption performance of nanoparticle absorbents, a novel tertiary amine functionalized nano-SiO 2 (NS-NR 2 ) was synthesized based on the 3-aminopropyltrimethoxysilane (KH540) modified nano-SiO 2 (NS-NH 2 ) via methylation. The chemical structure and performances of the NS-NR 2 were characterized through a series of experiments, which revealed that NS-NR 2 can react with CO 2 in water and nanofluid with low viscosity revealed better CO 2 capture. The CO 2 capture mechanism of NS-NR 2 was studied by kinetic models. From the correlation coefficient, the pseudo second order model was found to fit well with the experiment data. The influencing factors were investigated, including temperature, dispersants, and cycling numbers. Results has shown the additional surfactant to greatly promote the CO 2 adsorption performance of NS-NR 2 because of the better dispersity of nanoparticles. This work proved that NS-NR 2 yields low viscosity, high capacity for CO 2 capture, and good regenerability in water. NS-NR 2 with high CO 2 capture will play a role in storing CO 2 to enhanced oil recovery in CO 2 flooding.

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Effective absorption of SO₂ by imidazole‐based protic ionic liquids with multiple active sites: Thermodynamic and mechanical studies

et al. 2022

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In view of the environmental hazards caused by SO2, the development of efficient SO2 capture technology has important practical significance. In this work, a low‐viscosity protic ionic liquids containing imidazole (Im), ether linkage, and tertiary amine structure was synthesized by acid–base neutralization of tris(3,6‐dioxaheptyl)amine (TMEA) and Im for SO2 absorption. The results showed that the solubility of SO2 in [TMEA][Im] reached 12.754 mol kg−1 at 298.2 K and 1 bar and the ideal selectivity of SO2/CO2 (1/1) is 141.7 at 1 bar. Furthermore, [TMEA][Im] can be reused and the SO2 absorption performance was not significantly reduced after five cycles. In addition, the absorption of low‐concentration SO2 (2000 ppm) in [TMEA][Im] was also tested. Further spectroscopic research and thermodynamic analysis suggested that the high SO2 uptake by [TMEA][Im] was caused by the synergistic effect of physical and chemical absorption.

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CO2 capture with hybrid absorbents of low viscosity imidazolium-based ionic liquids and amine

Cited by 143 publications

References 40 publications

Kinetic Study of CO2 Hydration by Small-Molecule Catalysts with A Second Coordination Sphere that Mimic the Effect of the Thr-199 Residue of Carbonic Anhydrase

Kinetic Study of CO2 Hydration by Small-Molecule Catalysts with A Second Coordination Sphere that Mimic the Effect of the Thr-199 Residue of Carbonic Anhydrase

CO2 Capture With Absorbents of Tertiary Amine Functionalized Nano–SiO2

Effective absorption of SO₂ by imidazole‐based protic ionic liquids with multiple active sites: Thermodynamic and mechanical studies

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CO2 capture with hybrid absorbents of low viscosity imidazolium-based ionic liquids and amine

Cited by 143 publications

References 40 publications

Kinetic Study of CO2 Hydration by Small-Molecule Catalysts with A Second Coordination Sphere that Mimic the Effect of the Thr-199 Residue of Carbonic Anhydrase

Kinetic Study of CO2 Hydration by Small-Molecule Catalysts with A Second Coordination Sphere that Mimic the Effect of the Thr-199 Residue of Carbonic Anhydrase

CO2 Capture With Absorbents of Tertiary Amine Functionalized Nano–SiO2

Effective absorption of SO2 by imidazole‐based protic ionic liquids with multiple active sites: Thermodynamic and mechanical studies

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Product

Resources

About

Effective absorption of SO₂ by imidazole‐based protic ionic liquids with multiple active sites: Thermodynamic and mechanical studies