Liquid-liquid phase separation of {amine – H 2 O – CO 2 } systems: New methods for key data

Coulier, Yohann; Lowe, Alexander; Moreau, Alejandro; Ballerat‐Busserolles, Karine; Coxam, Jean Yves

doi:10.1016/j.fluid.2016.10.010

Cited by 12 publications

(14 citation statements)

References 35 publications

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“…There is an ongoing discussion whether such a liquid-liquid phase separation can be used in an advantageous way in CO 2 -absorption processes [72,73,74,75,76,77,78,79,80].…”

Section: Summary Of Resultsmentioning

confidence: 99%

Triacetoneamine-derivates (EvAs) for CO2-absorption from process gases

Kessler

Ninni

Vasiliu

et al. 2020

International Journal of Greenhouse Gas Control

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New amines for reactive absorption of CO 2 from process gases were investigated in a comprehensive experimental screening. All studied amines are derivates of triacetoneamine and differ only in the substituent of the triacetoneamine ring structure. The amines are abbreviated by the acronym EvA with a consecutive number, designating the derivate. About 50 EvAs were considered in this work from which 26 were actually synthesized and investigated in aqueous solution. The mass fraction of the amines in the unloaded solution was eitherw 0 EvA = 0.05 g/g orw 0 EvA = 0.4 g/g. The following properties were studied: solubility of CO 2 , rate of absorption of CO 2 , liquid-liquid and solid-liquid equilibrium, foaming behavior, dynamic viscosity, and acid constants. The nine most promising EvAs were evaluated with the NoVa short-cut method [1]. The method yields estimates for the specific energy demand and recirculation rate for a given purification task. Two typical purification tasks were considered: the CO 2 -removal from natural gas and from synthesis gas, respectively. Some of the EvAs showed significantly improved performance compared to monoethanolamine (MEA) and a solvent-blend of methyl-diethanolamine and piperazine (MDEA/PZ).

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“…There is an ongoing discussion whether such a liquid-liquid phase separation can be used in an advantageous way in CO 2 -absorption processes [72,73,74,75,76,77,78,79,80].…”

Section: Summary Of Resultsmentioning

confidence: 99%

Triacetoneamine-derivates (EvAs) for CO2-absorption from process gases

Kessler

Ninni

Vasiliu

et al. 2020

International Journal of Greenhouse Gas Control

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“…[37] This is also in accordance with the behavior of aqueous solutions of alkyl-piperidines in presence of CO 2 (with similar concentrations of amine and CO 2 ). [38] For a carbon capture application the kinetic of separation of two phases is a critical factor.…”

Section: Impact Of the Composition Of The Solvent On The Lcst In Des -Nmpiwater -Co 2 Mixturesmentioning

confidence: 99%

Tuning critical solution temperature for CO2 capture by aqueous solution of amine

Longeras

Gautier

Ballerat‐Busserolles

et al. 2021

Journal of Molecular Liquids

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“…It consists in determining the temperature at which a second liquid phase appears or disappears in the binary liquid system {amine + water}. For that purpose, two apparatuses designed by Coulier et al 23 were used. The main difference between these two techniques is the arrangements of the liquid−liquid equilibrium cells employed to visualize the appearance of the turbidity in the liquid mixture.…”

Section: Measurements Of Liquid−liquid Equilibria and Energetic Prope...mentioning

confidence: 99%

Thermodynamic Study of Four {Methylpiperidine + Water} Systems: New Experimental Data and Challenging Modeling for the Simultaneous Representation of Liquid–Liquid Equilibrium and Energetic Properties

et al. 2019

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In carbon capture processes based on chemical absorption, the solution used for absorbing carbon dioxide plays a central role and must be carefully selected. It is expected to have the potential to capture large amounts of carbon dioxide on the one hand, and to be fully regenerated at the lowest energy price on the other hand. As a continuation of a study initiated by Coulier et al. some years ago, the present work focuses on the measurement and modeling of thermodynamic properties of aqueous solvents containing methylpiperidines (a class of amines), potentially usable in carbon capture processes and leading to liquid–liquid phase split in process conditions. To complete liquid–liquid equilibrium (LLE), excess enthalpy and excess heat capacity data previously measured by Coulier et al. for the N-methylpiperidine + water and 2-methylpiperidine + water systems, LLE data, and excess-enthalpy data were measured for the 3-methylpiperidine + water and 4-methylpiperidine + water systems. To model all these data, a nonrandom two-liquid type activity-coefficient model was identified among tens of models as the most reliable one. Owing to the complex nature of interactions governing this type of systems, no less than 10 binary interaction parameters were necessary to ensure qualitative and quantitative correlations of our experimental data.

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Liquid-liquid phase separation of {amine – H 2 O – CO 2 } systems: New methods for key data

Cited by 12 publications

References 35 publications

Triacetoneamine-derivates (EvAs) for CO2-absorption from process gases

Triacetoneamine-derivates (EvAs) for CO2-absorption from process gases

Tuning critical solution temperature for CO2 capture by aqueous solution of amine

Thermodynamic Study of Four {Methylpiperidine + Water} Systems: New Experimental Data and Challenging Modeling for the Simultaneous Representation of Liquid–Liquid Equilibrium and Energetic Properties

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