Study of CO2 Solubility in Brine under Different Temperatures and Pressures

Hossein Hamidi* (Corresponding Author), Nur Farah Ain Mohd Atib, Amin Azdarpour, Erfan Mohammadian

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The solubility of CO2 in water and aqueous solutions of NaCl, KCl, CaCl2, NaCl+KCl (weight ratio= 1:1), NaCl+CaCl2 (weight ratio= 1:1), KCl+CaCl2 (weight ratio= 1:1) and NaCl+KCl+CaCl2 (weight ratio= 1:1:1) was determined experimentally at 35, 45 and 55°C up to 16 MPa and the concentration of the salt was up to 14.3 wt% while in simulation the salt ions of Na+, K+, Ca2+, and Cl- was determined at wide temperature-pressure-ionic strength range (273 to 533 K, from 0 to 2000 bar, and from 0 to 4.5 molality of salts). Based on experiment data, the solubility increased with increase in pressure but decreased with increasing the temperature and salt concentration. Meanwhile, the model also predicted the CO2 solubility in seawater at two phase coexistence (vapour-liquid or liquid-vapor) and at three-phase coexistence (CO2 hydrate-liquid water-vapor CO2).
Original languageEnglish
Pages (from-to)440-445
Number of pages6
JournalAdvanced Materials Research
Early online date13 Jul 2015
Publication statusPublished - 2015


  • CO2 sequestration
  • CO2 solubility
  • salt solution


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