CO2 hydrate formation in NaCl systems and undersaturated aqueous solutions

Rod Burgass; Antonin Chapoy; Kjell M. Askvik; Bengt Olav Neeraas; Xiaoyun Li

doi:10.2516/stet/2023005

CO₂ hydrate formation in NaCl systems and undersaturated aqueous solutions

Rod Burgass, Antonin Chapoy, Kjell M. Askvik, Bengt Olav Neeraas, Xiaoyun Li

Research output: Contribution to journal › Conference article › peer-review

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Abstract

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.

Original language	English
Article number	8
Journal	Science and Technology for Energy Transition
Volume	78
Issue number	8
DOIs	https://doi.org/10.2516/stet/2023005
Publication status	Published - 4 Apr 2023
Event	1st European Conference on Gas Hydrates 2022 - Lyon, France Duration: 13 Jun 2022 → 16 Jun 2022 https://ecgh2022.sciencesconf.org/

Keywords

Carbon dioxide
Gas solubility
Hydrates

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10.2516/stet/2023005Licence: CC BY

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title = "CO2 hydrate formation in NaCl systems and undersaturated aqueous solutions",

abstract = "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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T1 - CO2 hydrate formation in NaCl systems and undersaturated aqueous solutions

AU - Burgass, Rod

AU - Chapoy, Antonin

AU - Askvik, Kjell M.

AU - Neeraas, Bengt Olav

AU - Li, Xiaoyun

PY - 2023/4/4

Y1 - 2023/4/4

N2 - 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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CO₂ hydrate formation in NaCl systems and undersaturated aqueous solutions

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Keywords

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