Effect of temperature on carbon dioxide absorption in monoethanolamine solutions

Maceiras, R.; Álvarez, Estrella; Cancela, M.A.

doi:10.1016/j.cej.2007.05.049

Cited by 44 publications

(34 citation statements)

References 28 publications

(33 reference statements)

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“…[31][32][33] Conversely, results corresponding to monoethanolamine or 1-amino-2-propanol aqueous solutions produce certain similar behavior than the previously commented for pyrrolidine aqueous solutions: there is not a constant absorption rate period, but a change in the trend is observed.…”

supporting

confidence: 69%

CO₂ capture by pyrrolidine: Reaction mechanism and mass transfer

et al. 2014

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A new carbon dioxide capture process by means of gas-liquid absorption using pyrrolidine aqueous solutions in a bubble column reactor obtaining suitable results in comparison with other commonly used amines is analyzed. The influence of several operation variables such as amine concentration and gas flow rate has been studied. Carbon dioxide mass-transfer rate data have shown a different behavior than other amine-based systems because a constant value in absorption rate was observed in the middle of batch experiments. 13C and 1 H NMR spectroscopy studies were performed to analyze the species present during the experiments. These data and the carbon dioxide loading allowed to explain the reaction mechanism existed between these reagents.

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supporting

confidence: 69%

CO₂ capture by pyrrolidine: Reaction mechanism and mass transfer

et al. 2014

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“…[ [27][28][29][30] Time-dependent simulations were run using a generalized alpha timestepping method. Optical Microscopy : Optical microscopy images were taken with a Zeiss Axio Observer.A1 Microscope at a 5 × objective for determining interchannel distances and a 2.5 × objective for determining saturation times.…”

Section: Preparation Of Fibers For Exchange Unit Fabricationmentioning

confidence: 99%

The Effect of Membrane Thickness on a Microvascular Gas Exchange Unit

Nguyen¹,

Leho²,

Esser‐Kahn³

2012

Adv Funct Materials

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For reducing anthropogenic CO2 emissions, carbon capture and sequestration technologies benefit from the creation of new and efficient gas exchange systems. Vascularized systems provide a means of exchanging CO2 by providing high specific surface areas and patterned, intimate contact between capture fluids and gases. The well‐defined geometrical arrangement of fluid and gas channels, separated by semipermeable membranes, also provides a new platform for augmenting the function of liquid chemical solutions to carbon capture. In particular, the separation distance of the channels, or polymer membrane thickness, is closely related to the absorption rate as gases must permeate through the membrane before reacting with a fluid. Here, a study of the relationship between the membrane thickness in 3D microvascular contactors and absorption rates via a selective etching process is reported. By decreasing the membrane thickness, the mass transport rate of CO2 in the vascular contactor is increased by up to 160%.

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“…which is considered to be practically instantaneous [19,21]. Besides, high temperature is beneficial to the reversibility of this reaction [30], and thus can make the absorption rate slower and hinder the process of CO 2 absorption [31,32].…”

Section: Reaction Mechanismmentioning

confidence: 99%

“…The diffusivity coefficient of MEA in water was estimated from the equation proposed by Maceiras and Alvarez [21 …”

Section: Physical Propertiesmentioning

confidence: 99%

“…Akanksha and Srivastave [2] reported the gas side mass transfer coefficient for the case of countercurrent gas-liquid flow in a falling film microreactor and observed that mass transfer rate strongly depended on gas and liquid flow rates. Maceiras and Alvarez [21] investigated the effect of temperature on the volumetric mass transfer coefficient in a bubble column. The volumetric mass transfer coefficient was deduced depending on the two film theory and an assumption of instantaneous reaction regime between CO 2 and MEA.…”

Section: Introductionmentioning

confidence: 99%

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Process Characteristics of CO2 Absorption by Aqueous Monoethanolamine in a Microchannel Reactor

Chen

Yuan

2012

Chinese Journal of Chemical Engineering

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Process characteristics of CO 2 absorption using aqueous monoethanolamine (MEA) in a microchannel reactor were investigated experimentally in this work. A T-type rectangular microchannel with a hydraulic diameter of 408 μm was used. Operating parameters, i.e. temperature, pressure and molar ratio of MEA to CO 2 were studied. Under 3 MPa pressure, the mole fraction of CO 2 in gas phase could decrease from 32.3% to 300×10 −6 at least when gas hourly space velocity ranged from 14400 to 68600 h −1 and molar ratio of MEA to CO 2 was kept at 2.2. In particular, the effects of temperature on CO 2 absorption flux, mass transfer driving force, gas-liquid contact time and enhancement factor were analyzed in detail and found that mass transfer enhancement by chemical reaction was a crucial factor for the process of CO 2 absorption.

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Effect of temperature on carbon dioxide absorption in monoethanolamine solutions

Cited by 44 publications

References 28 publications

CO₂ capture by pyrrolidine: Reaction mechanism and mass transfer

CO₂ capture by pyrrolidine: Reaction mechanism and mass transfer

The Effect of Membrane Thickness on a Microvascular Gas Exchange Unit

Process Characteristics of CO2 Absorption by Aqueous Monoethanolamine in a Microchannel Reactor

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Effect of temperature on carbon dioxide absorption in monoethanolamine solutions

Cited by 44 publications

References 28 publications

CO2 capture by pyrrolidine: Reaction mechanism and mass transfer

CO2 capture by pyrrolidine: Reaction mechanism and mass transfer

The Effect of Membrane Thickness on a Microvascular Gas Exchange Unit

Process Characteristics of CO2 Absorption by Aqueous Monoethanolamine in a Microchannel Reactor

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Product

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CO₂ capture by pyrrolidine: Reaction mechanism and mass transfer

CO₂ capture by pyrrolidine: Reaction mechanism and mass transfer