Hydrogen physisorption in earth-minerals: Insights for hydrogen subsurface storage

Hesham Abdulelah*, Alireza Keshavarz, Hussein Hoteit, Hussein Abid, Eirini Goudeli, Jonathan Ennis-King, Stefan Iglauer*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Physisorption can contribute to hydrogen subsurface storage. However, hydrogen physisorption at the surface of geological samples is mostly unknown. We are unaware of previous studies that investigate H2 Physisorption in wide range of pure inorganic and organic earth minerals. Knowledge about H2 Physisorption is required to evaluate the suitability of underground H2 storage. We thus evaluated H2 physisorption on common earth minerals, including illite, kaolinite, quartz, calcite, and kerogen via lab experiments and Grand Canonical Monte Carlo (GCMC) simulations at temperature ranging between 273 and 373 K and pressure ranging between 5 MPa to 40 MPa. The simulation results, including densities and H2 adsorption uptakes, are in agreement with experimental results. The quantity of adsorbed hydrogen ranked as: illite > kerogen > kaolinite > quartz > calcite; and Gibbs energy change, enthalpy change, and isosteric heat energy indicated that H2 adsorption spontaneity increases as illite > kerogen > kaolinite > calcite > quartz. We conclude that H2 adsorption is high on the high-surface-area materials (clays or kerogen), and that H2 adsorption on earth minerals could improve the effectiveness of subsurface H2 storage.

Original languageEnglish (US)
Article number107440
JournalJournal of Energy Storage
Volume66
DOIs
StatePublished - Aug 30 2023

Bibliographical note

Publisher Copyright:
© 2023

Keywords

  • Geo-storage
  • Hydrogen
  • Hydrogen storage
  • Physisorption

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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