Carbon dioxide solubility in aqueous solutions of NaCl: Measurements and modeling with electrolyte equations of state
authors Carvalho, PJ; Pereira, LMC; Goncalves, NPF; Queimada, AJ; Coutinho, JAP
nationality International
journal FLUID PHASE EQUILIBRIA
author keywords Carbon dioxide; Water; NaCl; Henry's constant; CPA-Infochem EoS; RKSA-Infochem EoS; Electrolytes
keywords PRESSURE PHASE-BEHAVIOR; PLUS ALCOHOL SYSTEMS; OF-STATE; IONIC LIQUIDS; BINARY-MIXTURES; CO2 SOLUBILITY; WATER-SYSTEM; MULTICOMPONENT SYSTEMS; GAS SOLUBILITY; ACETIC-ACID
abstract A new high pressure cell was developed to measure the high pressure phase behavior of gas + aqueous salt solutions and validated through the measurement, and comparison against literature data, of two systems, the H2O +CO2 and H2O + CO2 + NaCl, at temperatures up to 363 K and pressures up to 13 MPa. As previously reported by others, a salting out effect on the carbon dioxide solubility in water by NaCl is observed, decreasing its solubility as the salt concentration increases. Electrolyte versions of the cubicplus-association and the RKSA-Infochem equations of state were used to estimate the H2O + CO2 and H2O + CO2 + NaCl phase behavior, with both EoS providing a good representation of the experimental data. (C) 2014 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE BV
issn 0378-3812
year published 2015
volume 388
beginning page 100
ending page 106
digital object identifier (doi) 10.1016/j.fluid.2014.12.043
web of science category Thermodynamics; Chemistry, Physical; Engineering, Chemical
subject category Thermodynamics; Chemistry; Engineering
unique article identifier WOS:000349878800015
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journal impact factor 2.197
5 year journal impact factor 2.214
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