Pore-scale study of microbial hydrogen consumption and wettability alteration during underground hydrogen storage
نویسندگان
چکیده
Hydrogen can be a renewable energy carrier and is suggested to store mitigate carbon dioxide emissions. Subsurface storage of hydrogen in salt caverns, deep saline formations, depleted oil/gas reservoirs would help overcome imbalances between supply demand energy. Hydrogen, however, one the most important electron donors for many subsurface microbial processes, including methanogenesis, sulfate reduction, acetogenesis. These processes cause loss changes reservoir properties during geological operations. Here, we report results typical halophilic sulfate-reducing bacterium growing microfluidic pore network saturated with gas at 35 bar 37°C. Test duration 9 days. We observed significant H 2 from consumption after days following injection into device. The rate decreased over time as activity declined network. influenced profoundly by surface area bubbles activity. Microbial growth silicon was change wettability water-wet neutral-wet state. Due coupling effect microbes alteration, number disconnected increased sharply time. may have implications recovery injectivity. First, pore-scale experimental reveal impacts on storage, which are useful estimate rapidly risk storage. Second, microvisual experiments provide critical observations bubble-liquid interfacial reaction that essential modeling needed make long-term predictions. Third, us improve selection criteria future sites.
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ژورنال
عنوان ژورنال: Frontiers in Energy Research
سال: 2023
ISSN: ['2296-598X']
DOI: https://doi.org/10.3389/fenrg.2023.1124621