Kinetics of the reactive absorption of carbon dioxide in high CO2-loaded, concentrated aqueous monoethanolamine solutions

Aboudheir, Ahmed; Tontiwachwuthikul, Paitoon; Chakma, A.; Idem, Raphael

doi:10.1016/j.ces.2003.08.014

Cited by 323 publications

(323 citation statements)

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“…The similar conclusion was earlier made by Aboudheir et al [4] who reviewed the literature data on the kinetics of CO 2 reaction with aqueous MEA and revealed large discrepancies between the values or expressions of the reported second order reaction rate constants. The wide variation that has been found in the values of reaction rate constant was attributed to uncertainties in the physical properties used, inability to determine the exact contact area between a gas and liquid in the absorption process, the possibility of existence of interfacial turbulence in some types of absorbers, and the assumption of a pseudo first order reaction.…”

Section: Introductionsupporting

confidence: 67%

Determination of Kinetics in Gas-Liquid Reaction Systems. An Overview

Kierzkowska‐Pawlak¹

2012

Ecological Chemistry and Engineering S

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Abstract:The aim of this paper is to present a brief review of the determination methods of reaction kinetics in gas-liquid systems with a special emphasis on CO2 absorption in aqueous alkanolamine solutions. Both homogenous and heterogeneous experimental techniques are described with the corresponding theoretical background needed for the interpretation of the results. The case of CO2 reaction in aqueous solutions of methyldiethanolamine is discussed as an illustrative example. It was demonstrated that various measurement techniques and methods of analyzing the experimental data can result in different expressions for the kinetic rate constants.

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Section: Introductionsupporting

confidence: 67%

Determination of Kinetics in Gas-Liquid Reaction Systems. An Overview

Kierzkowska‐Pawlak¹

2012

Ecological Chemistry and Engineering S

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“…As for the bulk PAlAm solution, Nagai et al [17] CO 2 may be absorbed via the zwitterion formation, the carbamate formation and the recovering free amino group via the dissociation of the protonated MEA. Although the above three reactions comprise just a part of the complicated reaction mechanism [18], they suggest that MEA may absorb CO 2 in a molar ratio larger than 0.5, which is in fact consistent with their experimental observations. Thus, the 0.43 as the mole-base A.A. value obtained for the present aqueous PAlAm solution was an unexpected result because the polymer also contains primary amino groups as MEA does.…”

Section: Co2 Absorption Measurementssupporting

confidence: 79%

CO<sub>2</sub> Absorption Performance of “Dry Matter” Prepared with Amino Acid-Based Ionic Liquids

Miyake¹,

Satoh²

2017

GSC

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Dry Matter (DM) is a powdery substance which is composed of micro droplets and surrounding hydrophobic silica nanoparticles. Because of the much larger surface area than that of the corresponding bulk liquid, DM, which contains amino-functionalized ionic liquids (ILs), is a promising CO 2 absorption material provided with quick absorption speed. In the present study, we successfully prepared powdery DMs by utilizing aqueous solutions of amino acid-based ILs (tetraethylammonium glycine [N 2222 , we used 10% of aqueous poly(allylamine) (PAlAm) solution instead of water. The resultant mass-base A.A. proved to be significantly larger (1.9) than either of those of the respective single component systems (1.1 and 0.75 for the bulk IL and aq. PAlAm, respectively), and comparable to the A.A. (1.6 -2.5) of 20% -30% monoethanolamine solution which is commonly used in industrial application.

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“…For both considered solutions, the reactions are rather fast as compared to the species transport (see Aboudheir et al 16 for solution 1 and Vas Bhat et al 17 for solution 2). The reac-…”

Section: Basic Hypothesesmentioning

confidence: 95%

Nonmonotonic Rayleigh-Taylor Instabilities Driven by Gas–Liquid CO₂ Chemisorption

et al. 2014

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Density variations induced by gas absorption in reactive aqueous solutions often trigger buoyancy-induced motions, generally in the form of plumes monotonically sinking into the bulk liquid and enhancing the absorption rate. Here, we contrast two types of CO 2 -absorbing alkaline solutions, studying their dynamics inside a vertical Hele-Shaw cell by interferometry. While the first one indeed behaves as expected, the second one leads to a quite unusual oscillatory (phase-slipping) dynamics of convective plumes, which moreover does not lead to a significant transfer enhancement. Thanks to a simplified model of momentum and species transport, we show that this particular dynamics is related to a non-monotonic density stratification, resulting in a stagnant layer close to the interface. Conditions for this to occur are highlighted in terms of the ratios of species' diffusivities and their contribution to density, a classification deemed to be useful for optimizing chemisorption (e.g. for CO 2 capture or sequestration) processes.

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Kinetics of the reactive absorption of carbon dioxide in high CO2-loaded, concentrated aqueous monoethanolamine solutions

Cited by 323 publications

References 50 publications

Determination of Kinetics in Gas-Liquid Reaction Systems. An Overview

Determination of Kinetics in Gas-Liquid Reaction Systems. An Overview

CO<sub>2</sub> Absorption Performance of “Dry Matter” Prepared with Amino Acid-Based Ionic Liquids

Nonmonotonic Rayleigh-Taylor Instabilities Driven by Gas–Liquid CO₂ Chemisorption

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Kinetics of the reactive absorption of carbon dioxide in high CO2-loaded, concentrated aqueous monoethanolamine solutions

Cited by 323 publications

References 50 publications

Determination of Kinetics in Gas-Liquid Reaction Systems. An Overview

Determination of Kinetics in Gas-Liquid Reaction Systems. An Overview

CO&lt;sub&gt;2&lt;/sub&gt; Absorption Performance of “Dry Matter” Prepared with Amino Acid-Based Ionic Liquids

Nonmonotonic Rayleigh-Taylor Instabilities Driven by Gas–Liquid CO2 Chemisorption

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Product

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CO<sub>2</sub> Absorption Performance of “Dry Matter” Prepared with Amino Acid-Based Ionic Liquids

Nonmonotonic Rayleigh-Taylor Instabilities Driven by Gas–Liquid CO₂ Chemisorption