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dc.contributor.authorGarcia, Monica
dc.contributor.authorKnuutila, Hanna K
dc.contributor.authorAronu, Ugochukwu Edwin
dc.contributor.authorGu, Sai
dc.date.accessioned2019-08-16T11:07:52Z
dc.date.available2019-08-16T11:07:52Z
dc.date.created2018-09-27T16:39:46Z
dc.date.issued2018
dc.identifier.citationInternational Journal of Greenhouse Gas Control. 2018, 78 286-305.nb_NO
dc.identifier.issn1750-5836
dc.identifier.urihttp://hdl.handle.net/11250/2608750
dc.description.abstractAqueous amine solutions are the most used solvents for chemical absorption of CO2. Substituting part of the water by organic solvents in aqueous amine solutions aims to take advantage of the lower partial pressure and higher CO2 solubility. In this work, the influence of four organic solvents on solution density, viscosity, N2O solubility and absorption kinetics are studied. The organic solvents, Monoethylene Glycol (MEG), Diethylene Glycol (DEG), Triethylene Glycol (TEG) and CARBITOL, are blended with two amine solutions: MEA and DEEA-MAPA blend. The results show that the addition of organic solvents increases the density and viscosity. Furthermore, the N2O solubility, used to estimate the physical solubility of CO2 into a reactive system, increases when part of the water is substituted with an organic solvent. The kinetic experiments with a double stirred cell showed that in case of aqueous 5 M MEA, the substitution of part of the water increases both the mass transfer and kinetic coefficients of the CO2, whereas the substitution in the 3M DEEA + 2M MAPA solution was not that favorable and only the substitution of MEG showed enhancement on the mass transfer and kinetic coefficients over the whole temperature range studied. The results can be partly explained by the changes in viscosity and N2O solubility in the different systems, since the viscosity of the MEA organic solvent blends is lower compared to that of DEEA + MAPA blends and have less negative influence on the kinetics. At the same time, the increase of N2O solubility in the MEA blends is much higher than in DEEA + MAPA blends, resulting in more CO2 available to react. Finally, the kinetic coefficients results are discussed together with dielectric constant of the dilution media.nb_NO
dc.language.isoengnb_NO
dc.publisherElseviernb_NO
dc.relation.urihttps://www.sciencedirect.com/science/article/pii/S175058361731037X
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/deed.no*
dc.titleInfluence of substitution of water by organic solvents in amine solutions on absorption of CO2nb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionacceptedVersionnb_NO
dc.source.pagenumber286-305nb_NO
dc.source.volume78nb_NO
dc.source.journalInternational Journal of Greenhouse Gas Controlnb_NO
dc.identifier.doi10.1016/j.ijggc.2018.07.029
dc.identifier.cristin1615267
dc.relation.projectNorges forskningsråd: 239789nb_NO
dc.description.localcode© 2018. This is the authors’ accepted and refereed manuscript to the article. Locked until 11.9.2020 due to copyright restrictions. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/nb_NO
cristin.unitcode194,66,30,0
cristin.unitnameInstitutt for kjemisk prosessteknologi
cristin.ispublishedtrue
cristin.fulltextpreprint
cristin.qualitycode2


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Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal
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