A simple model for the prediction of CO2 solubility in H2O–NaCl system at geological sequestration conditions

摘要: Abstract Carbon dioxide (CO2) released in the atmosphere is principal cause of so-called global warming or greenhouse phenomenon. One procedure for mitigation CO2 consists capture, transport and geological storage (sequestration) gas deep saline aquifers. In this work, a model predicting solubility H2O–NaCl system covering conditions typically encountered sequestration (e.g., 300–500 K, 50–2000 bar, 1–4 mol salt/kg) has been developed validated by comparison with available experimental theoretical data. The simple one four adjustable parameters that based on an extension well-known Setschenov [Kgs / Kg0 = (P / P0)f(Tr,m) f(Tr,m) = (0.461 + 0.078 m)(− 1 + Tr / (1.0 + 0.1267 m)]. exploiting interesting features behavior data water over above-mentioned ranges conditions. capable accuracy comparable to made multi-parameter models (having 20 more). It also very good agreement root-mean-squared-error (RMSE) range 0.03–0.225 mol CO2/kg H2O. extrapolative power acceptable at both ends its applicability.