Speaker
Description
Underground hydrogen storage (UHS) represents a promising solution for the temporal balancing of energy supply and demand in energy systems increasingly based on renewable sources. Suitable geological storage formations include both water-saturated porous media (aquifers) as well as former hydrocarbon reservoirs such as depleted gas or oil fields. For the planning, development, and operation of such storage systems, a detailed understanding of the coupled flow and reactive transport processes in porous media is essential.
In this work, a numerical simulation model is presented that consistently couples two-phase flow processes with biogeochemical reactive transport. Particular emphasis is placed on the representation of microbial growth and reaction kinetics, allowing for the description of both substrate-rich and substrate-limited conditions. The model captures the interactions between gas and liquid phases, diffusive and advective transport mechanisms, and microbially induced reactions.
Key model parameters were calibrated using laboratory-scale porous media experiments, including diffusion experiments on core samples and microfluidic studies. In addition, the model has been preliminarily calibrated and validated using field data. The results indicate that biogeochemical processes can measurably influence hydrogen transport, gas composition, and overall storage performance. The proposed modeling approach provides a practical framework for evaluating coupled physical and biogeochemical processes in underground hydrogen storage systems.
| Country | Germany |
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