Extension of the Patel—Teja equation of state to the prediction of the solubility of natural gas in formation water

The Patel—Teja equation of state (PT EOS) is extended to phase equilibrium calcultations for electrolyte solutions under high pressure by adding a Debye—Huckel electrostatic contribution term. A new mixing rule similar to that developed by Kurihara (1987) is used for the energy parameter a. The exte...

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Bibliographic Details
Published inChemical engineering science Vol. 46; no. 12; pp. 3251 - 3258
Main Authors Zuo, You-Xiang, Guo, Tian-Min
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 1991
Elsevier
Subjects
Chemistry
Exact sciences and technology
General and physical chemistry
Phase equilibria
Water
Equations of state
Thermodynamic model
Electrolyte solution
Solubility
Theoretical study
Physical properties
Phase equilibrium
Natural gas
Interaction parameter
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Summary:The Patel—Teja equation of state (PT EOS) is extended to phase equilibrium calcultations for electrolyte solutions under high pressure by adding a Debye—Huckel electrostatic contribution term. A new mixing rule similar to that developed by Kurihara (1987) is used for the energy parameter a. The extended PT EOS retains its original cubic form in volume. The binary interaction parameters are determined: for water—salt pairs (from osmotic coefficient data of aqueous solutions at 25°C); for gas—water pairs (from VLE data of binary nonelectrolyte mixtures); and for salt—gas pairs (from low-pressure gas solubility data in aqueous salt solutions). Satisfactory results are obtained.
ISSN:0009-2509
1873-4405
DOI:10.1016/0009-2509(91)85026-T