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Coupling mass transfer with mineral reactions to investigate CO2 sequestration in saline aquifers with non-equilibrium thermodynamics
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Energivetenskap.ORCID-id: 0000-0002-0200-9960
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Byggkonstruktion och -produktion.
2011 (engelsk)Inngår i: Proceedings of the World Renewable Energy Congress 2011 (WREC 2011): 9-13 May, Linköping, Linköping University Electronic Press, 2011Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

The coupling behaviors of mass transfer of aqueous CO2 with mineral reactions of aqueous CO2 with rock anorthite are investigated by chemical potential gradient and concentration gradient models, respectively. SAFT1-RPM is used to calculate the fugacity of CO2 in brine. The effective diffusion coefficients of CO2 are obtained based on the experimental kinetic data reported in literature. The calculation results by the two models and for two cases (mass transfer only and coupling mass transfer with mineral reaction) are compared. The results show that there are considerable discrepancies for the concentration distribution with distance by the concentration gradient and chemical potential gradient models, which implies the importance of consideration of the non-ideality. And the concentrations of aqueous CO2 at different distances by the concentration gradient model are higher and further than that by the chemical potential gradient model. The mineral reaction plays a considerable role for the CO2 geological sequestration when the time scale reaches 10 years for the anorthite case.

sted, utgiver, år, opplag, sider
Linköping University Electronic Press, 2011.
HSV kategori
Forskningsprogram
Energiteknik
Identifikatorer
URN: urn:nbn:se:ltu:diva-28534Lokal ID: 25b257f4-137c-4034-a543-f69c8a300fbaOAI: oai:DiVA.org:ltu-28534DiVA, id: diva2:1001733
Konferanse
World Renewable Energy Congress : 09/05/2011 - 13/05/2011
Merknad
Godkänd; 2011; 20111024 (ysko)Tilgjengelig fra: 2016-09-30 Laget: 2016-09-30 Sist oppdatert: 2017-11-25bibliografisk kontrollert

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