Experimental Mutual Solubilities of CO 2 and H 2 O in Pure Water and NaCl Solutions

Marie-Camille Caumon (1) , Jérôme Sterpenich (1) , Aurélien Randi (1) , Jacques Pironon (1)

1 GeoRessources

Solubility measurements in conditions relevant to CO2 geological storage are sparse, especially solubility data of water in the CO2-rich phase. New data are acquired by in situ Raman spectroscopy in NaCl aqueous. An effect of NaCl concentration is observed on calibration curves in the H2O-rich phase: the slope of the fitted curve ICO2/IH2O = f(sCO2) is equal to 4.97, 4.25, and 3.93 at 0, 1, and 2 M NaCl, respectively. On the contrary, the Raman signal in the CO2-rich phase is not affected by salinity. The slope of the fitted curve ACO2/AH2O = f(yCO2/yH2O) is equal to 1.72 whatever the NaCl concentration.

Mots clés: CO2 geological storage; solubility; Raman spectroscopy

Domaines: Géologie appliquée; Chimie théorique et/ou physique

Marie-Camille Caumon, Jérôme Sterpenich, Aurélien Randi, Jacques Pironon. Experimental Mutual Solubilities of CO 2 and H 2 O in Pure Water and NaCl Solutions. 13th International Conference on Greenhouse Gas Control Technologies, GHGT-13, 14-18 November 2016, Lausanne, Switzerland, Nov 2017, Lausanne, Switzerland. pp.4851-4856, ⟨10.1016/j.egypro.2017.03.1625⟩. ⟨hal-01575638⟩