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%0 Thesis
%A Khajooie, Saeed
%T Experimental investigation of porosity, surface area, and gas diffusivity impacts on methanogenic activity within porous media: implications for underground hydrogen storage
%I Rheinisch-Westfälische Technische Hochschule Aachen
%V Dissertation
%C Aachen
%M RWTH-2025-01375
%P 1 Online-Ressource : Illustrationen
%D 2024
%Z Veröffentlicht auf dem Publikationsserver der RWTH Aachen University 2025
%Z Dissertation, Rheinisch-Westfälische Technische Hochschule Aachen, 2024
%X AbstractThe transition from fossil fuels to renewable energy sources has significantly increased interest in large-scale hydrogen (H2) storage within subsurface formations. This strategy addresses the intermittency issues of renewable energy caused by atmospheric fluctuations, leading to an imbalance in energy supply and demand. Surplus energy can be converted to H2 via water electrolysis and then stored in various geological formations, including depleted oil and gas reservoirs, saline aquifers, and salt caverns. However, injecting H2 into subsurface formations may stimulate microbial metabolism, potentially leading to the irreversible conversion of H2 into byproducts like CH4, H2S, and acetic acid, posing risks of H2 contamination and equipment corrosion. Despite these challenges, the potential to convert H2 into CH4 through biological processes, a technique known as bio-methanation, presents an opportunity for sustainable underground methane production.This work aimed to explore the impact of pore characteristics on methanogenic activity within porous media. The model organism was Methanothermococcus thermolithotrophicus, a strain of methanogenic Archaea. Reservoir analogues from the Cretaceous (Bentheim Sandstone, Obernkirchen Sandstone, Anröchter Grün Limestone) and Triassic (Red and Grey Weser Sandstone) were selected for this study based on their differences in porosity (8-24 
%F PUB:(DE-HGF)11
%9 Dissertation / PhD Thesis
%R 10.18154/RWTH-2025-01375
%U https://publications.rwth-aachen.de/record/1004346