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  • The project will investigate the impacts of real flue gas and vent gas recycling on the combustion performance, emissions, ignition and flame stability of oxy-coal combustion by means of 250kW PACT facility testing and comprehensively validated CFD modelling, and to assess various flue gas recycling scenarios and the benefits of vent gas recycling by process simulation. Grant number: UKCCSRC-C1-27.

  • Excel file containing the bubble measurement data. The dynamic characteristics of CO2 bubbles in Scottish seawater are investigated through observational data obtained from the QICS project. Images of the leaked CO2 bubble plume rising in the seawater were captured. This observation made it possible to discuss the dynamics of the CO2 bubbles in plumes leaked in seawater from the sediments. Utilising ImageJ, an image processing program, the underwater recorded videos were analysed to measure the size and velocity of the CO2 bubbles individually. It was found that most of the bubbles deform to non-spherical bubbles and the measured equivalent diameters of the CO2 bubbles observed near the sea bed are to be between 2 and 12 mm. The data processed from the videos showed that the velocities of 75% of the leaked CO2 bubbles in the plume are in the interval 25-40 cm/s with Reynolds numbers (Re) 500-3500, which are relatively higher than those of an individual bubble in quiescent water. The drag coefficient Cd is compared with numerous laboratory investigations, where agreement was found between the laboratory and the QICS experimental results with variations mainly due to the plume induced vertical velocity component of the seawater current and the interactions between the CO2 bubbles (breakup and coalescence). The breakup of the CO2 bubbles has been characterised and defined by Eotvos number, Eo, and Re.

  • Compositional data of clinopyroxene crystals standards analysed by electron probe microanalyses for major element oxides and by Mossbauer spectroscopy for iron valence and unknown clinopyroxene crystals from Iceland and the Azores . These data were collected in support of research described in the following preprints: https://doi.org/10.31223/X5CT03 and https://doi.org/10.31223/X5N959

  • MicroCT (Micro–computed tomography) data of the left lower jaw of the Carboniferous stem tetrapod Crassigyrinus scoticus (GSE 4722), which was scanned in three parts (the specimen is preserved in three parts). The specimen was scanned at the Natural History Museum’s Imaging and Analysis Centre on a Nikon XH 225 microCT scanner in February 2013 and reconstructed as DICOM image stacks. All three parts were scanned at 210 kV and 240 mA. Part 1 represents the anterior part of the jaw and the scan produced 1995 transverse slices with a resolution of 0.1271 mm/voxel. Part 2 represents the middle part of the jaw and the scan produced 1995 transverse slices with a resolution of 0.1099 mm/voxel. Part 3 represents the posterior part of the jaw and the scan produced 1687 transverse slices with a resolution of 0.1099 mm/voxel. It was collected by Laura Porro and Jennifer Clack for anatomical description of the specimen and further biomechanical analyses.

  • The three-component data are downloaded from CDSN and processed with instrument response removed. The data coverages include sampling in the East Asia, southwest and northwest Pacific.

  • The CO2 controlled release experiment “Quantifying and Monitoring Potential Ecosystem Impacts of Geological Carbon Storage” (QICS) assessed the impacts of potential CO2 leakage from sub-seabed carbon capture and storage reservoirs to the marine environment. During QICS, CO2 gas was released into shallow sediment in Ardmucknish Bay, Scotland, in the spring and summer of 2012. As part of this project, we investigated the effects of CO2 leakage on sedimentary phosphorus (P), an essential nutrient for marine productivity. We found no statistically significant effects during QICS, as the solid-phase P content in the sediment was constant before, during, and after exposure to CO2. However, laboratory experiments using marine sediment standard materials as well as QICS sediment revealed substantial differences among these different sediment types in their potential for P release during CO2 exposure. Employing the SEDEX sequential extraction technique to determine the sizes of the major P pools in the sediments, we showed that calcium-bound P can be easily released by CO2 exposure, whereas iron-bound P is a major sink of released P. The overall impacts of CO2 leakage on sediment P behavior appear to be low compared to natural variability. This is a publication in QICS Special Issue - International Journal of Greenhouse Gas Control, Ayumi Tsukasaki et. al. Doi:10.1016/j.ijggc.2014.12.023.

  • Shallow overland flows in steady state can become unstable and break up into destructive surges. The following data documents maximum growth rates for disturbances to uniform steady flows on a fixed slope in a one-dimensional shallow-layer model that incorporates the mechanics of erosion and deposition of monodisperse sediment, documented in sections 2 and 4 of the following freely available preprint: https://arxiv.org/abs/2007.15989. The data comprises the following 4 columns, separated by spaces: grain diameter, Froude number, solid fraction and maximum growth rate. Grain diameter refers to the characteristic diameter of erodible particles, non-dimensionalised by the steady flow depth h0. Froude number, Fr, is a dimensionless constant defined as Fr = u0 / sqrt(h0 * g'), where u0 is the velocity of the steady flow and g' is gravitational acceleration resolved perpendicular to the slope. Solid fraction is a number between 0 and 1 that describes the proportion of solid particles in the flowing mixture. A solid fraction of 0 denotes a purely fluid flow and a solid fraction of 1 denotes a saturated mixture containing a maximum packing of solid particles. Maximum growth rate refers to the largest linear growth rate for perturbations to a uniform flowing layer with the corresponding properties given in the prior 3 columns. The model formulation describes the dynamics of 4 unknown observables: flow height, flow velocity, solids concentration and bed height. By taking the 'maximum' in this case, we mean the maximum over these 4 flow fields that may be perturbed by an environmental disturbance and also the maximum over all possible wavelengths of disturbance. We note that in this dataset, flows with a maximum growth rate equal to zero or small positive values (e.g. up to machine precision) are stable; flows with strictly positive growth rate are unstable. Zero growth rate indicates that the maximum growth rate is given by a neutrally stable perturbation and such perturbations always exist for reasons of symmetry in the model. For each grain diameter and Froude number in the dataset, there exist two steady uniform states with different solid fractions. Therefore two files are supplied - one containing data for the more dilute states and the other containing data for the more concentrated states. These various technical details, as well as full documentation of the model and the parameters used are explained more fully in the aforementioned paper.

  • Two categories of data are presented: 1) Experimental data of catalyst performance under conditions for a Blast Furnace Gas (BFG) to methanol to process, comprising the monitored gas phase species evolution in a single channel micro reactor. 2) Process simulation and techno-economic analysis of the BFG-to-methanol process, comprising Aspen Plus V10 anotated process flowsheet, process model summary, stream results, reactor performances and cost analysis calculation. Funded by UKCCSRC 2018 Flexible Funding Call

  • Many of the research results from the SACS and CO2STORE projects are published in the scientific literature but in a somewhat fragmented form. This report consolidates some of the key findings into a manual of observations and recommendations relevant to underground saline aquifer storage, aiming to provide technically robust guidelines for effective and safe storage of CO2 in a range of geological settings. This will set the scene for companies, regulatory authorities, nongovernmental organisations, and ultimately, the interested general public, in evaluating possible new CO2 storage projects in Europe and elsewhere. The report can be downloaded from http://nora.nerc.ac.uk/2959/.

  • Ab initio trajectories for the equilibrated MgO-SiO2-H2O melts at T = 1800 K and 3000 K are provided as "XDATCAR" files output directly from VASP for each simulation interval. Corresponding stress tensor components, required for calculation of viscosity via the autocorrelation function, together with the energy, temperature, and pressure are also provided for each iteration of the equilibrated trajectories. A full data inventory is provided in the READ_ME.txt file.