Numerical Investigations of Reactive Transport Processes during the Storage of Hydrogen in the Porous Subsurface

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• Publisher: Cuvillier Verlag
• Year: 2024
• eBook ISBN:
  9783689520434
• Print ISBN:
  9783689520014
• Edition: 1

This thesis investigates Underground Hydrogen Storage (UHS) in the porous subsurface by numerical simulation. Particular focus is placed on hydrodynamics and potential bio- and geochemical reactions caused by interactions of hydrogen, microorganisms, and rock minerals, respectively. For this purpose, a mathematical model for the bio-geo-reactive transport in porous media was developed and incorporated in the open-source simulator DuMu x.The implementation was calibrated by the reproduction of recent laboratory experiments regarding molecular diffusion and bio- and geochemical reactions. Initial field-scale simulation runs were performed to estimate the risk of temporal and permanent hydrogen losses during UHS operation. Subsequently, the model was extended for the implementation of mechanical dispersion, strengthening the gas-gas mixing, and subsequently, predictions for an ongoing field test in Germany were made. In the last step, the realization in DuMux was used to predict the potential stimulation of methanogenic microorganisms to initiate the concept of

Table of contents

• Abstract
• Kurzfassung
• Preface
• Contents
• List of Figures
• List of Tables
• Chapter 1 Introduction
• 1.1. Underground Hydrogen Storage
• 1.2. Underground Bio Methanation
• 1.3. Motivation and objectives
• 1.4. Outline of the thesis
• Chapter 2 Fundamentals and state of the art
• 2.1. Relevant processes during the storage of hydrogen inthe subsurface
• 2.2. Numerical modeling of reactive transport processes inporous media
• Chapter 3 Extension and calibration of the bio-geo-reactivetransport model for UHS
• 3.1. Mathematical model of bio-geo-reactive transport processes
• 3.2. Realization of bio-geo-reactive transport model in Du-Mux
• 3.3. Calibration of simulation model based on laboratory investigations
• 3.4. Benchmark study for the simulation of UHS operations
• 3.5. Conclusions and outlook
• Chapter 4 Extension of UHS field-scale simulation on CVFEmethod to allow for the modeling of mechanicaldispersion
• 4.1. Extension of source code and modeling description
• 4.2. Numerical simulation of UHS field test
• 4.3. Conclusions and outlook
• Chapter 5 Coupling of microbial growth to the salt componentfor modeling of Underground Bio Methanation
• 5.1. Extension of microbial growth in dependency of thesalinity
• 5.2. Definition of simulation scenarios and sensitivity study
• 5.3. Results of sensitivity study
• 5.4. Conclusions and outlook
• Chapter 6Conclusions
• Bibliography