Doctoral Theses (Energy, Geoscience, Infrastructure and Society)
Permanent URI for this collectionhttps://hdl.handle.net/10399/2794
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Item Pore-scale 3D imaging of hydrogen storage in rocks(Heriot-Watt University, 2024-05) Jangda, Zaid Zaffar; Singh, Associate Professor Kamaljit; Busch, Professor Andreas; Geiger, Sebastian;Escalating concerns over climate change have accelerated the need to transition towards cleaner energy sources, such as hydrogen. For a sustainable hydrogen economy, effective storage solutions are important. Subsurface porous rocks offer a promising solution, capable of storing substantial volumes of hydrogen for varying durations to meet fluctuations in energy demand. However, a comprehensive understanding of hydrogen flow and entrapment within these rocks, particularly under reservoir conditions, remains a significant challenge. In this thesis, X-ray micro-tomography is used to investigate the pore-scale distribution, trapping, and recovery of hydrogen under subsurface conditions. Through 3D flow-visualisation experiments on sandstone rocks, initial and residual hydrogen saturations are quantified, providing an assessment of the hydrogen storage capacity and recovery efficiency of these rocks. Additionally, the potential dissolution of hydrogen in brine is observed, a phenomenon that could contribute to hydrogen loss during storage and production. Furthermore, the influence of small-scale rock heterogeneity is investigated through experiments on a layered rock. These experiments highlight how subtle rock structure variations impact hydrogen displacement, leading to reduced storage capacity upon injection and significant hydrogen trapping during production. Such findings stress the pivotal roles of pore-scale processes and small-scale rock heterogeneity in the design, selection, and implementation of subsurface hydrogen storage systems. Moreover, a comparison of experimental results with a pore-network model reveals that simplistic models fall short in accurately predicting hydrogen flow and trapping in real rocks, particularly heterogeneous media. This highlights the importance of experimental research, such as this study, in advancing our understanding and optimisation of subsurface hydrogen storage.Item Fracture in reinforced concrete: computational and analytical studies(Heriot-Watt University, 1999-12) Gastebled, Olivier J.; May, Professor Ian M.Please refer to PDF.Item An investigation into the influences upon and determinants of perceived quality achievement in the management of construction projects by multivariate analysis(Heriot-Watt University, 1988-06) Sani, Habu; Torrance, Professor Victor B.; Cheesman, Peter G.Abstract unavailable please refer to PDFItem Prediction of sulphate scaling tendency and investigation of barium and strontium sulphate solid solution scale formation(Heriot-Watt University, 1989-07) Yuan, Mingdong; Todd, Doctor A.C.Abstract unavailable please refer to PDFItem The influence of design team communication content upon the architectural decision making process in the pre contract design stages(Heriot-Watt University, 1987-08) Wallace, W. A.; Kelly, J.No abstract available please refer to PDFItem Decision support and risk management system for competitive bidding in refurbishment work(Heriot-Watt University, 1990-06) Teo, Ho PinNo abstract available refer to PDFItem The design and management of tanks for the culture of turbot (Scophthalmus maximus (L))(Heriot-Watt University, 1990-03) Cripps, Simon Johathan; Poxton, MikeAbstract not available please refer to PDFItem Application of quaternary diagrams to the compositional modelling of gasmiscible processes(Heriot-Watt University, 1987) Sarkar, RadheshyamItem Annular flow of Herschel-bulkley non-Newtonian fluids and mathematicalmodelling of efficient hole cleaning at various hole angles(Heriot-Watt University, 1994) Gao, ErhuAbstract unavailable please refer to PDFItem Reaction and flow of carbonated brines through calcareous sandstones: a study under oil reservoir conditions(Heriot-Watt University, 1985) Scott-Will Andrew Graeme