Document Type

Journal Article

Publication Title

International Journal of Hydrogen Energy

Publisher

Elsevier

School

School of Engineering

RAS ID

61946

Funders

Australian Research Council

Grant Number

ARC Number : DP220102907

Comments

Hosseini, M., Sedev, R., Ali, M., Ali, M., Fahimpour, J., Keshavarz, A., & Iglauer, S. (2023). Hydrogen-wettability alteration of Indiana limestone in the presence of organic acids and nanofluid. International Journal of Hydrogen Energy, 48(90), 35220-35228. https://doi.org/10.1016/j.ijhydene.2023.05.292

Abstract

This study focuses on the wettability alteration (changing from a hydrophobic state to a hydrophilic state) of Indiana limestone for hydrogen (H2) geological storage. We examine the effect of hexanoic acid C6, lauric acid C12, and stearic acid C18, on the wettability of Indiana limestone at ambient (298 K and 0.1 MPa) and reservoir (323 K and 8.27 MPa) conditions. The effects of silica nanofluids (silica with deionized water) at various concentrations (0.1 wt%, 0.25 wt%, and 0.5 wt%) on the wettability reversal of stearic-aged samples were tested at ambient and reservoir conditions. The results revealed increased H2-wetness (hydrophobicity) of the rock exposed to these organic acids in reservoir conditions. However, this hydrophobicity significantly decreased with the nanofluid treatment of the stearic-aged samples. This wettability reversal may increase the H2 storage capacity and containment security and lead to successful large-scale geological storage operations if H2 residual trapping is minimized.

DOI

10.1016/j.ijhydene.2023.05.292

Creative Commons License

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

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