Carbon dioxide solubility in aqueous solutions of NaCl: Measurements and modeling with electrolyte equations of state

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• 作者：Pedro J. Carvalhop>ap>p> ; p>p>quijorge@ua.pt" class="auth_mail" title="E-mail the corresponding authorp> ; Luí ; s M.C. Pereirap>ap> ; Neusa P.F. Gonç ; alvesp>ap> ; Antó ; nio J. Queimadap>bp> ; Joã ; o A.P. Coutinhop>ap>p> ; p>p>jcoutinho@ua.pt" class="auth_mail" title="E-mail the corresponding authorp>
• 关键词：Carbon dioxide ; Water ; NaCl ; Henry&rsquo ; s constant ; CPA-Infochem EoS ; RKSA-Infochem EoS ; Electrolytes
• 刊名：Fluid Phase Equilibria
• 出版年：2015
• 出版时间：25 February 2015
• 年：2015
• 卷：388
• 期：Complete
• 页码：100-106
• 全文大小：2189 K

文摘

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 cubic-plus-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.