Hydrogen and Cushion Gas Adsorption–Desorption Dynamics on Clay Minerals
Source abstract
Abstract
High Resolution Image Download MS PowerPoint Slide Transitioning toward a hydrogen (H 2 )-centric energy paradigm necessitates understanding the adsorption properties of clay minerals, essential constituents of reservoirs and caprocks, for efficient geological H 2 storage. This study examines the adsorption characteristics of H 2 on various clay minerals (montmorillonite, illite, chlorite, kaolinite, and sepiolite) at different temperatures and the adsorption of cushion gases (N 2, CH 4, and CO 2 ) under reservoir conditions (313.15 K, up to 10 MPa). The results indicate that sepiolite demonstrates superior adsorption capacity under all tested conditions, surpassing montmorillonite by over 12 times at 313.15 K for H 2 . Illite, chlorite, and kaolinite exhibit negligible H 2 adsorption. Thermodynamic analysis reveals that H 2 adsorption on clay minerals is a nonspontaneous and exothermic physisorption process. H 2 loss due to adsorption hysteresis in montmorillonite and sepiolite is 42.19 and 3.56%, respectively. Sepiolite may exhibit more predictable and stable sorption properties under repeated pressure variations. The H 2 adsorption capacity of montmorillonite and sepiolite is merely 0.4 and 4.5% of that of CO 2, respectively. This study provides valuable insights for selecting clay minerals and cushion gases for efficient geological H 2 storage and natural hydrogen exploration.
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Research context
OpenAlex topics: Hydrocarbon exploration and reservoir analysis · Coal Properties and Utilization · NMR spectroscopy and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Key Laboratory of Ocean Energy Utilization and Energy Conservation of the Ministry of Education, Dalian University of Technology, Dalian 116024, China
Department of Geosciences, University of Oslo, P. O. Box 1047 Blindern, 0316 Oslo, Norway
Applied Geoscience Department, SINTEF Industry, 7465 Trondheim, Norway
Ningbo Institute of Dalian University of Technology, No.26 Yucai Road, Jiangbei District, Ningbo 10315016, China
School of Geosciences, University of Edinburgh, Grant Institute, West Main Road, Edinburgh EH9 3FE, United Kingdom
Funding
Norges Forskningsr?d · National Key Research and Development Program of China · University of Edinburgh · Fundamental Research Funds for the Central Universities · National Natural Science Foundation of China
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