A NonIterative Model to Compute CO2 -H2O Mutual Solubilities at 12-100°C and Up to 600 Bar
Nicolas Spycher and Karsten Pruess
Contact: Nicolas Spycher, 510/495-2388, nspycher@lbl.gov
Research Objectives
Evaluating the feasibility of CO2 geologic sequestration requires intensive numerical simulations of multiphase fluid flow. These simulations require the calculation of pressure-temperature-composition (P-T-X) data for mixtures of CO2 and H2O under moderate pressures and temperatures at which a CO2 -rich phase (gas or liquid) and an H2O-rich liquid coexist. The objective of this study is to develop correlations to calculate efficiently and accurately the composition of these phases at equilibrium, for implementation into numerical simulations of water-CO2 flows.
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 Calculated mutual solubilities of CO2 and H2O in this study (solid lines) and experimental data from the literature (symbols, with different shapes or colors for each different set of data). Dotted lines assume ideal mixing. Letters y and x refer to mole fractions in the compressed gas and aqueous phases, respectively.
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