TY - JOUR
T1 - Kinetics of CO2 absorption by aqueous N,N-diethylethanolamine solutions
T2 - Literature review, experimental results and modelling
AU - Monteiro, Juliana G. M. -S.
AU - Knuutila, Hanna
AU - Penders-van Elk, Nathalie J. M. C.
AU - Versteeg, Geert
AU - Svendsen, Hallvard F.
PY - 2015/5/4
Y1 - 2015/5/4
N2 - This work studies the kinetics of CO2 absorption into N,N-diethylethanolamine (DEEA) solutions. A comprehensive literature review is presented, in an attempt to understand the reasons behind the scatter observed in the literature data. Experiments were performed to measure the physical solubility of N2O in aqueous DEEA solutions in a concentration and temperature range that encloses the kinetics data range. Additionally, new data on mass transfer and kinetics of CO2 into aqueous DEEA solutions were produced in a stirred cell reactor. The data show an unexpected behaviour from 3 M DEEA and up, which is not explained by taking the system non-idealities into consideration and revaluating the kinetics using activity basis. A DEEA clustering hypothesis is proposed to explain such behaviour. It is shown that the clustering hypothesis is compatible with the thermodynamic properties of aqueous DEEA solutions, and can be used to qualitatively explain the solubility and kinetics data presented in this work. (C) 2015 Elsevier Ltd. All rights reserved.
AB - This work studies the kinetics of CO2 absorption into N,N-diethylethanolamine (DEEA) solutions. A comprehensive literature review is presented, in an attempt to understand the reasons behind the scatter observed in the literature data. Experiments were performed to measure the physical solubility of N2O in aqueous DEEA solutions in a concentration and temperature range that encloses the kinetics data range. Additionally, new data on mass transfer and kinetics of CO2 into aqueous DEEA solutions were produced in a stirred cell reactor. The data show an unexpected behaviour from 3 M DEEA and up, which is not explained by taking the system non-idealities into consideration and revaluating the kinetics using activity basis. A DEEA clustering hypothesis is proposed to explain such behaviour. It is shown that the clustering hypothesis is compatible with the thermodynamic properties of aqueous DEEA solutions, and can be used to qualitatively explain the solubility and kinetics data presented in this work. (C) 2015 Elsevier Ltd. All rights reserved.
KW - CO2 absorption
KW - N,N-diethylethanolamine
KW - Kinetics
KW - Solubility
KW - Clusters
KW - CARBON-DIOXIDE REACTION
KW - STOPPED-FLOW TECHNIQUE
KW - PHASE-CHANGE SOLVENTS
KW - FIRED POWER-PLANTS
KW - MONOETHANOLAMINE SOLUTIONS
KW - N-METHYLDIETHANOLAMINE
KW - DIFFUSION-COEFFICIENTS
KW - ALKANOLAMINE SOLUTIONS
KW - ELECTROLYTE SOLUTIONS
KW - TEMPERATURE-RANGE
U2 - 10.1016/j.ces.2014.12.061
DO - 10.1016/j.ces.2014.12.061
M3 - Article
SN - 0009-2509
VL - 127
SP - 1
EP - 12
JO - Chemical Engineering Science
JF - Chemical Engineering Science
ER -