EGU22-6837
https://doi.org/10.5194/egusphere-egu22-6837
EGU General Assembly 2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Interfacial Tension of CO2-Water Under Conditions for High-Temperature Geothermal Systems: Prediction and Investigation by Molecular Dynamics Simulation

Masashige Shiga1, Tetsuya Morishita2,3, and Masao Sorai1
Masashige Shiga et al.
  • 1Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), Japan
  • 2Research Center for Computational Design of Advanced Functional Materials (CD-FMat), National Institute of Advanced Industrial Science and Technology (AIST), Japan
  • 3Mathematics for Advanced Materials Open Innovation Laboratory (MathAM-OIL), National Institute of Advanced Industrial Science and Technology (AIST), c/o AIMR, Tohoku University, Japan

For several decades, research on CCUS (carbon capture, storage, and utilization) have been extensively carried out to achieve substantial reduction of the amount of CO2 emitted into the atmosphere and effective resource development. In recent years, high temperature reservoirs have recently been considered as a target for CO2 injection. This aims at development of unconventional geothermal resources and CO2 mineralization.

Since the value of CO2-water interfacial tension is a fundamental property of fluid behavior in CO2-water-rock systems, many studies have been reported on CO2-water interfacial tension. However, the temperature of the geothermal reservoir in the above-mentioned technology may be up to 300 ℃, which is much higher than typical conditions for CCUS. It is not easy to perform measurements under such high temperature conditions, and no experimental data have been reported in existing studies.

Therefore, in this study, we performed molecular dynamics simulations to estimate the interfacial tension up to 300 ℃, and also studied the detailed properties such as density and dynamics.

How to cite: Shiga, M., Morishita, T., and Sorai, M.: Interfacial Tension of CO2-Water Under Conditions for High-Temperature Geothermal Systems: Prediction and Investigation by Molecular Dynamics Simulation, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-6837, https://doi.org/10.5194/egusphere-egu22-6837, 2022.