Abstract

Hydrogen storage is a main issue in the establishment of a hydrogen economy. Geo-storage could be a viable solution if hydrogen could be injected into and withdrawn from suitable geological formations, reversibly and reliably. Rock wettability is a major factor as it affects injectivities, withdrawal rates, storage capacities, and containment security. We report here the contact angles of a brine on the surface of a bituminous coal in a pressurized hydrogen atmosphere. Under realistic geo-storage conditions the coal surface was weakly water-wet. Hydrogen pressure increased brine contact angles at 25°C but did not have an impact at 50 or 70°C. We present a thermodynamic model that describes the observed behavior. Our results would support the development of large-scale geo-storage technologies for hydrogen.

RAS ID

52695

Document Type

Journal Article

Date of Publication

4-28-2022

Funding Information

Australian Research Council's Discovery Projects funding scheme. Grant Number: DP220102907

School

School of Engineering / Centre for Sustainable Energy and Resources

Grant Number

ARC Number : DP220102907

Creative Commons License

Creative Commons Attribution 4.0 License
This work is licensed under a Creative Commons Attribution 4.0 License.

Publisher

Wiley

Comments

Sedev, R., Akhondzadeh, H., Ali, M., Keshavarz, A., & Iglauer, S. (2022). Contact Angles of a Brine on a Bituminous Coal in Compressed Hydrogen. Geophysical Research Letters, 49(8), p. 1-6, e2022GL098261. https://doi.org/10.1029/2022GL098261

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Link to publisher version (DOI)

10.1029/2022GL098261