CO2 hydrate formation in NaCl systems and undersaturated aqueous solutions

被引：6
作者：
Burgass, Rod [1 ]
Chapoy, Antonin [1 ,2 ]
Askvik, Kjell M. [3 ]
Neeraas, Bengt Olav [3 ]
Li, Xiaoyun [3 ]
机构：
[1] Heriot Watt Univ, Inst GeoEnergy Engn, Hydrates Flow Assurance & Phase Equilibria Res Gr, Edinburgh EH14 4AS, Midlothian, Scotland
[2] PSL Univ, CTP Ctr Thermodynam Proc, Mines ParisTech, 35 Rue St, F-77305 Fontainebleau, France
[3] Equinor ASA, Arkitekt Ebbells Veg 10, N-7053 Trondheim, Norway
来源：
SCIENCE AND TECHNOLOGY FOR ENERGY TRANSITION | 2023年 / 78卷
关键词：
Carbon dioxide; Gas solubility; Hydrates; CARBON-DIOXIDE HYDRATE; PHASE-EQUILIBRIA; SODIUM-CHLORIDE; ELECTROLYTE-SOLUTIONS; WATER; SOLUBILITY; PRESSURE; BEHAVIOR; METHANE; LIQUID;
D O I：
10.2516/stet/2023005
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
A high-pressure experimental setup was used to obtain experimental data on the Hydrate Equilibrium (melting) Temperature (HET) of aqueous phases undersaturated with CO2, at different CO2 saturation levels and with different aqueous phase compositions (sodium chloride and sodium chloride/calcium chloride). This paper details the experimental equipment, methods, test fluids, and results. To study the phase equilibria of CO2-brine systems and further validate the results, hydrate dissociation conditions of CO2 in different concentrations of NaCl aqueous solutions were measured in the low-temperature region and over a wide range of pressure. Experimental results were compared against predictions of the simplified Cubic Plus Association Equation of State (sCPA-EoS) coupled with the van der Waals and Platteeuw solid solution theory.
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页数：11
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