All Outputs (46)

Caprock complexity and storage assurance: Advanced findings on CO₂ containment in the Bunter Sandstone Formation (2025)
Journal Article
Alsayah, A., & Rigby, S. P. (2025). Caprock complexity and storage assurance: Advanced findings on CO₂ containment in the Bunter Sandstone Formation. International Journal of Greenhouse Gas Control, 146, Article 104428. https://doi.org/10.1016/j.ijggc.2025.104428

The lower Triassic Bunter Sandstone Formation in the Southern North Sea is a promising site for CO2 storage. This reservoir has a complex structure, particularly in the overlying Haisborough Group caprock, along with fractured shale interlayers, chim... Read More about Caprock complexity and storage assurance: Advanced findings on CO₂ containment in the Bunter Sandstone Formation.

Impact of caprock complexity on carbon dioxide plume behaviour and storage security in the Bunter Sandstone Formation (2025)
Journal Article
Alsayah, A., & Rigby, S. P. (2025). Impact of caprock complexity on carbon dioxide plume behaviour and storage security in the Bunter Sandstone Formation. Geoenergy Science and Engineering, 254, Article 214011. https://doi.org/10.1016/j.geoen.2025.214011

Carbon capture and storage (CCS) is expected to play a vital role in achieving greenhouse gas reduction targets. The lower Triassic Bunter Sandstone Formation in the UK Southern North Sea is considered one of the most promising CO2 storage sites. The... Read More about Impact of caprock complexity on carbon dioxide plume behaviour and storage security in the Bunter Sandstone Formation.

Impact of the pore structure on non-wetting phase distribution and gas phase mass transport within cathode-side catalyst layers of PEM fuel cells (2025)
Journal Article
Rigby, S. P., Baron, K., Smith, L., Spanakos, D., Sharman, J., Softley, E., & Fletcher, R. S. (2025). Impact of the pore structure on non-wetting phase distribution and gas phase mass transport within cathode-side catalyst layers of PEM fuel cells. Journal of Power Sources, 648, Article 237430. https://doi.org/10.1016/j.jpowsour.2025.237430

Much of the efficiency of PEMFCs is determined by the water handling properties of the cathode-side catalyst layer (CCL), which depend upon its particular pore structure and distribution of the various phases therein. A new (to this application) gas... Read More about Impact of the pore structure on non-wetting phase distribution and gas phase mass transport within cathode-side catalyst layers of PEM fuel cells.

A standardized MRI phantom for dissolved phase 129Xe MRI (2024)
Journal Article
Filkins, M., Harrison, A., Collier, G. J., Norquay, G., Wild, J. M., Rigby, S. P., Pavlovskaya, G. E., & Meersmann, T. (2024). A standardized MRI phantom for dissolved phase 129Xe MRI. Journal of Magnetic Resonance, 21, Article 100175. https://doi.org/10.1016/j.jmro.2024.100175

Pulmonary MRI of hyperpolarized xenon-129 (hp129Xe) dissolved in the lung parenchyma and vascular phase is gaining increasing attention for clinical assessment of gas exchange in multiple diseases. These conditions can involve thickening of barrier t... Read More about A standardized MRI phantom for dissolved phase 129Xe MRI.

Advancing carbon dioxide capture: investigation into the kinetics and efficiency of absorption in molten calcium oxide-chloride (2024)
Journal Article
Hall, M., Rigby, S. P., & Chen, G. Z. (2024). Advancing carbon dioxide capture: investigation into the kinetics and efficiency of absorption in molten calcium oxide-chloride. RSC Sustainability, 3, 341-351. https://doi.org/10.1039/d4su00354c

One promising carbon capture technology is the absorption of carbon dioxide (CO2) by molten salt, specifically the molten mixture of calcium oxide and chloride (CaO + CaCl2, COC), as it solves some of the key issues with alternative methods, includin... Read More about Advancing carbon dioxide capture: investigation into the kinetics and efficiency of absorption in molten calcium oxide-chloride.

Novel THAI well arrangements for improving heavy oil recovery rate in comparison to that achievable in the conventional THAI in situ combustion technology (2024)
Journal Article
Ado, M. R., Greaves, M., & Rigby, S. P. (2024). Novel THAI well arrangements for improving heavy oil recovery rate in comparison to that achievable in the conventional THAI in situ combustion technology. Geoenergy Science and Engineering, 241, Article 213159. https://doi.org/10.1016/j.geoen.2024.213159

The toe-to-heel air injection (THAI) method is an environmentally friendly process for in situ upgrading of heavy oils and bitumen via in situ combustion (ISC). Unlike the conventional ISC that uses a vertical producer, the THAI process uses a horizo... Read More about Novel THAI well arrangements for improving heavy oil recovery rate in comparison to that achievable in the conventional THAI in situ combustion technology.

Stability of THAI in situ combustion process in reservoirs with layers of grading permeabilities and porosities: Detailed qualitative investigations (2024)
Journal Article
Ado, M. R., Greaves, M., & Rigby, S. P. (2024). Stability of THAI in situ combustion process in reservoirs with layers of grading permeabilities and porosities: Detailed qualitative investigations. Geoenergy Science and Engineering, 241, Article 213158. https://doi.org/10.1016/j.geoen.2024.213158

The world-wide reserves of heavy oil, tar sand, and bitumen, etc., outweigh those of conventional oil by a factor of 7/3. Given that the conventional reserves are being rapidly depleted, the need to develop and produce the unconventional resources ha... Read More about Stability of THAI in situ combustion process in reservoirs with layers of grading permeabilities and porosities: Detailed qualitative investigations.

MRI and PFG NMR studies of percolation effects in advanced melting during a cryoporometry characterisation of disordered mesoporous alumina (2024)
Journal Article
Himona, E., Stevens, L., Williams, H., & Rigby, S. P. (2024). MRI and PFG NMR studies of percolation effects in advanced melting during a cryoporometry characterisation of disordered mesoporous alumina. Microporous and Mesoporous Materials, 377, Article 113202. https://doi.org/10.1016/j.micromeso.2024.113202

Cryoporometry (or thermoporometry) offers a way of pore structural characterisation for mesoporous materials that often needs little sample preparation, is relatively quick, and is statistically-representative for macroscopic samples. While it is wel... Read More about MRI and PFG NMR studies of percolation effects in advanced melting during a cryoporometry characterisation of disordered mesoporous alumina.

Do Pores Exist?—Foundational Issues in Pore Structural Characterisation (2024)
Journal Article
Rigby, S. P. (2024). Do Pores Exist?—Foundational Issues in Pore Structural Characterisation. Foundations, 4(2), 225-248. https://doi.org/10.3390/foundations4020015

This work reviews a range of fundamental theoretical considerations in pore structural characterisation. The pore concept is essential for providing a better understanding of physical processes arising within porous media than purely phenomenological... Read More about Do Pores Exist?—Foundational Issues in Pore Structural Characterisation.

Pore structure-transport relationships in high-temperature shift catalyst pellets studied by integrated multiscale porosimetry and X-ray tomography (2024)
Journal Article
Mousa, S., Beech, T., Softley, E., Fletcher, R. S., Kelly, G., Viney, E., & Rigby, S. P. (2024). Pore structure-transport relationships in high-temperature shift catalyst pellets studied by integrated multiscale porosimetry and X-ray tomography. Chemical Engineering Science, 292, Article 120005. https://doi.org/10.1016/j.ces.2024.120005

Diffusion-limited, heterogeneously-catalysed processes mean choices influencing pore structure-transport relationships, made during pellet fabrication, affect product performance. This work shows how the ‘sifting strategy’ can identify the critical a... Read More about Pore structure-transport relationships in high-temperature shift catalyst pellets studied by integrated multiscale porosimetry and X-ray tomography.

Storage Sites for Carbon Dioxide in the North Sea and Their Particular Characteristics (2023)
Journal Article
Rigby, S. P., & Alsayah, A. (2024). Storage Sites for Carbon Dioxide in the North Sea and Their Particular Characteristics. Energies, 17(1), Article 211. https://doi.org/10.3390/en17010211

This paper reviews and evaluates work on the structural complexity of the potential carbon dioxide storage sites in the North Sea, including the nature of the reservoir structures, the reservoir rocks, the presence of inter-layers, faults, and fractu... Read More about Storage Sites for Carbon Dioxide in the North Sea and Their Particular Characteristics.

Coupled multiphase flow, geochemical, and geomechanical modelling of the impact of shale interlayers on CO2 migration (2023)
Journal Article
Alsayah, A., & Rigby, S. P. (2023). Coupled multiphase flow, geochemical, and geomechanical modelling of the impact of shale interlayers on CO2 migration. Geoenergy Science and Engineering, 229, Article 212101. https://doi.org/10.1016/j.geoen.2023.212101

The need to find sufficient capacity for geological carbon dioxide (CO2) storage to meet demand means less-than ideal, heterogeneous reservoirs need to be considered. Many such reservoirs are apparently compartmentalised by inter-layers, which may he... Read More about Coupled multiphase flow, geochemical, and geomechanical modelling of the impact of shale interlayers on CO2 migration.

Evolution of the pore structure-transport relationship during catalyst reduction and sintering studied by integrated multi-scale porosimetry and multi-modal imaging (2023)
Journal Article
Mousa, S., Novak, V., Fletcher, R. S., Kelly, G., Garcia, M., Macleod, N., Parmenter, C., & Rigby, S. P. (2023). Evolution of the pore structure-transport relationship during catalyst reduction and sintering studied by integrated multi-scale porosimetry and multi-modal imaging. Chemical Engineering Science, 277, Article 118880. https://doi.org/10.1016/j.ces.2023.118880

Catalyst pellet fabrication parameters significantly impact final product performance. Tabletted pellets are complex, hierarchical structures that evolve differently over various levels during subsequent processing. Multi-scale porosimetry and multi-... Read More about Evolution of the pore structure-transport relationship during catalyst reduction and sintering studied by integrated multi-scale porosimetry and multi-modal imaging.

The Anatomy of Amorphous, Heterogeneous Catalyst Pellets (2023)
Journal Article
Rigby, S. P. (2023). The Anatomy of Amorphous, Heterogeneous Catalyst Pellets. Materials, 16(8), Article 3205. https://doi.org/10.3390/ma16083205

This review focuses on disordered, or amorphous, porous heterogeneous catalysts, especially those in the forms of pellets and monoliths. It considers the structural characterisation and representation of the void space of these porous media. It discu... Read More about The Anatomy of Amorphous, Heterogeneous Catalyst Pellets.

Field performance and numerical simulation study on the toe to heel air injection (THAI) process in a heavy oil reservoir with bottom water (2022)
Journal Article
Anbari, H., Robinson, J. P., Greaves, M., & Rigby, S. P. (2023). Field performance and numerical simulation study on the toe to heel air injection (THAI) process in a heavy oil reservoir with bottom water. Journal of Petroleum Science and Engineering, 220(Part B), Article 111202. https://doi.org/10.1016/j.petrol.2022.111202

Extra-heavy oil and bitumen (EHOB) comprise 30 percent of the remaining recoverable fossil fuel resources on Earth. This means EHOB could play an important role in a secure transition towards net zero emissions (NZE) by 2050. Technological developmen... Read More about Field performance and numerical simulation study on the toe to heel air injection (THAI) process in a heavy oil reservoir with bottom water.

Pore Structure-Transport Relationships in Bowland Shale (2022)
Book Chapter
Pitcher, E. G., Fletcher, R. S., Large, D. J., & Rigby, S. P. (2023). Pore Structure-Transport Relationships in Bowland Shale. In The Bowland Shale Formation, UK: Processes and Resources (183-200). Geological Society. https://doi.org/10.1144/sp534-2021-97

Shale rocks are highly structurally and chemically heterogeneous, such that the pore structure-transport relationship is complex. Shales typically have porosity over many length-scales from the molecular up to macroscopic fractures. This work utilize... Read More about Pore Structure-Transport Relationships in Bowland Shale.

Impact of Exposure to Supercritical Carbon Dioxide on Reservoir Caprocks and Inter-Layers during Sequestration (2022)
Journal Article
Rigby, S. P., Alsayah, A., & Seely, R. (2022). Impact of Exposure to Supercritical Carbon Dioxide on Reservoir Caprocks and Inter-Layers during Sequestration. Energies, 15(20), Article 7538. https://doi.org/10.3390/en15207538

The long-term exposure of rocks to supercritical carbon dioxide (scCO2) during sequestration creates structural and chemical changes. In turn, these lead to changes in the permeability of inter-layers and caprocks that can alter plume migration behav... Read More about Impact of Exposure to Supercritical Carbon Dioxide on Reservoir Caprocks and Inter-Layers during Sequestration.

Integration of multi-scale porosimetry and multi-modal imaging in the study of structure-transport relationships in porous catalyst pellets (2022)
Journal Article
Mousa, S., Novak, V., Fletcher, R. S., Garcia, M., Macleod, N., Corfield, M., & Rigby, S. P. (2023). Integration of multi-scale porosimetry and multi-modal imaging in the study of structure-transport relationships in porous catalyst pellets. Chemical Engineering Journal, 452(Part 1), Article 139122. https://doi.org/10.1016/j.cej.2022.139122

The forming process for heterogeneous catalyst pellets impacts on reactor performance. In order to intelligently optimise the product formulation and manufacturing procedure, the impact of fabrication options on the resultant pore structure and mass... Read More about Integration of multi-scale porosimetry and multi-modal imaging in the study of structure-transport relationships in porous catalyst pellets.

Triangulation of pore structural characterisation of disordered mesoporous silica using novel hybrid methods involving dual-probe porosimetries (2022)
Journal Article
Mousa, S., Baron, K., Fletcher, R. S., & Rigby, S. P. (2022). Triangulation of pore structural characterisation of disordered mesoporous silica using novel hybrid methods involving dual-probe porosimetries. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 653, Article 130026. https://doi.org/10.1016/j.colsurfa.2022.130026

The key issue, in applying indirect pore structure characterisation methods to disordered materials, is that usually some physical assumptions are necessary to probe pore size, such as concerning the mode of the phase transition used, which determine... Read More about Triangulation of pore structural characterisation of disordered mesoporous silica using novel hybrid methods involving dual-probe porosimetries.

Evolution of the mineralogy, pore structure and transport properties of Nordland Shale following exposure to supercritical carbon dioxide (2022)
Journal Article
Seely, R., Liddy, T. J., Rochelle, C. A., Fletcher, R. S., & Rigby, S. P. (2022). Evolution of the mineralogy, pore structure and transport properties of Nordland Shale following exposure to supercritical carbon dioxide. Journal of Petroleum Science and Engineering, 213, Article 110466. https://doi.org/10.1016/j.petrol.2022.110466

The Nordland shale forms the caprock of the Utsira sands of the Sleipner reservoir currently used for carbon dioxide sequestration. The long-term exposure of shale rocks to supercritical carbon dioxide (scCO2), or scCO2-brine mixtures, may lead to st... Read More about Evolution of the mineralogy, pore structure and transport properties of Nordland Shale following exposure to supercritical carbon dioxide.