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QICS Paper: Impact and recovery of pH in marine sediments subject to a temporary carbon dioxide leak
A possible effect of a carbon dioxide leak from an industrial sub-sea floor storage facility, utilised for Carbon Capture and Storage, is that escaping carbon dioxide gas will dissolve in sediment pore waters and reduce their pH. To quantify the scale and duration of such an impact, a novel, field scale experiment was conducted, whereby carbon dioxide gas was injected into unconsolidated sub-sea floor sediments for a sustained period of 37 days. During this time pore water pH in shallow sediment (5 mm depth) above the leak dropped >0.8 unit, relative to a reference zone that was unaffected by the carbon dioxide. After the gas release was stopped, the pore water pH returned to normal background values within a three-week recovery period. Further, the total mass of carbon dioxide dissolved within the sediment pore fluids above the release zone was modelled by the difference in DIC between the reference and release zones. Results showed that between 14 and 63% of the carbon dioxide released during the experiment could remain in the dissolved phase within the sediment pore water. This is a publication in QICS Special Issue - International Journal of Greenhouse Gas Control, Peter Taylor et. al. Doi:10.1016/j.ijggc.2014.09.006.
UKCCSRC Call 2 project poster: Performance of Flow Meters with Dense Phase CO2 and CCS Recovery Streams, CSLF Call project poster reception, London, 27.06.16
This poster on the UKCCSRC Call 2 project Performance of Flow Meters with Dense Phase CO2 and CCS Recovery Streams was presented at the CSLF Call project poster reception, London, 27.06.16. Grant number: UKCCSRC-C2-201. Captured carbon dioxide (CO2) from CCS operations needs to be transported to the storage location. Metering of the flow could be challenging due to the presence of impurities as well as unusual physical properties of the CO2 with impurities. The metering accuracy must be within the range of ±1.5% by mass according to the European Union Emission Trading Scheme (EU ETS) regulations. However, no investigations have been performed to evaluate the performance of flowmeters with pressurized CO2 at operational CCS conditions. The goal of project is to investigate the performance of Coriolis mass flowmeter with high CO2 content mixtures. Specific objectives of the project include: • To study the effect of impurities on the accuracy of the Coriolis flow meter. • To investigate the performance of Coriolis flow meter at conditions likely to happen in the CCS operations. • Evaluation of costs for the deployment of Coriolis flow meter in CCS operations.
Chemical potentials of liquid iron mixtures at ICB conditions and of solid ferropericlase at CMB conditions (NERC grant NE/M000990/1)
This dataset contains VASP runs performed on several supercomputing services (ARCHER, Monsoon, Thomas and Grace in the UK; Eos in the USA) to calculate the chemical potentials of liquid iron mixtures and solid ferropericlase at Earth's core conditions using density functional theory. Data are available for the chemical potentials of iron in MgFeO and oxygen in liquid FeSiO. These data were used to calculate the partitioning of oxygen between ferropericlase and Earth's liquid core and to analyse the chemical boundary layer above the CMB. The present grant also supported work regarding the homogeneous solid nucleation in iron and iron-oxygen mixtures at Earth's core conditions when dealing with the core paradox. Classical nucleation theory data and results from VASP runs and classical molecular dynamics runs performed on ARCHER and Eos (Oak Ridge, USA) are also included in the uploaded dataset. In addition, the present grant also supported research on the dynamics and evolution of the Earth's core, together with a study confirming the saturation of electrical resistivity of solid iron at Earth’s core conditions (these data were uploaded as part of a previous NERC Grant, NE/H02462X/1). Further details can be found in Davies, Pozzo and Alfe’ (2018, in press); Davies et al. (2018); Pozzo and Alfe’ (2016); Davies et al. (2015).
While chemical looping (combustion, CLC) is a promising technology for carbon capture, however many questions still remain as to its applicability at an industrial scale. In Chemical looping combustion a metal oxide is shuttled back and forth between a fuel and air reactor, picking up oxygen in the air reactor and transferring it to the fuel reactor. The fuel is never mixed with the nitrogen from the air, so a stream of CO2 and H2O is produced directly from the fuel reactor; this potentially makes the integrated power production and CO2 capture system highly efficient. Most CLC and CLOU schemes envisage using fluidised beds in which the solid fuel is intimately mixed with the oxygen carrier, or mixing of the solid fuel particles. This project aims to push forward chemical looping within the UK and integrates both experimental work and theoretical analysis to result in the first large-scale demonstration of CLC within the UK. Grant number: UKCCSRC-C1-39.
The World Magnetic Model (WMM), produced jointly with the US National Oceanographic and Atmospheric Administration's National Geophysical Data Center, is the standard model in UK Ministry of Defence and US Department of Defense navigation and attitude reference systems and is also used widely in civilian navigation systems. The model is also used on marine and aviation charts and is revised every five years.
This presentation on the UKCCSRC Call 1 project, UK Bio-CCS CAP, was presented at the Cranfield Biannual, 22.04.15. Grant number: UKCCSRC-C1-38.
These data contain time series of stress, strain, confining pressure, pore pressure, pore volume and elastic wave velocities of samples of quartz sand aggregates deformed under hydrostatic and triaxial conditions at room temperature. This dataset is used and fully described/interpreted in the paper: Hangx S. J. T. and N. Brantut,Micromechanics of high pressure compaction in granular quartz aggregates, submitted to J. Geophys. Res.
Geoelectric field maps of the UK from four large geomagnetic storms derived from thin-sheet model (NERC Grant NE/P017231/1)
This is a thin-sheet model of the regional geoelectric field covering the UK and Ireland, which is a combination of the response of the ground conductivity in a region with the spatial and temporal measurements of the rate of change of the horizontal components of the magnetic field. Output from the BGS Space Weather Impact on Ground-based Systems (SWIGS)
Report: Kingsnorth E.ON UK Carbon Capture & Storage Front End Engineering and Design (FEED) - Chapter 05: Technical Design-Carbon capture and compression plant
During 2010-11, as part of the Carbon Capture & Storage (CCS) Demonstration Competition process, E.ON undertook a Front End Engineering Design (FEED) study for the development of a commercial scale CCS demonstration plant at Kingsnorth in Kent, South East England. The study yielded invaluable knowledge and the resulting material is available for download here. This chapter presents the FEED stage Capture and Compression plant technical design. The 'Design Basis for CO2 Recovery Plant' lists the design parameters relating to the capture plant site, the flue gas to be treated, the utilities available, the required life and availability of the plant, and other constraints to be complied with in the capture plant, dehydration and compression design. The details of the processes of capture, compression, and dehydration are best visualised on the Process Flow Diagrams (PFDs) which show the process flows described above together with additional detail of coolers, pumps, and other plant items. Separate PFDs are provided for the capture plant, the compression plant, and the dehydration plant to show the complete flue gas and CO2 flows. Some of the key aspects of the technical design of the Capture and Compression plant are; There are two separate water circuits shown in the quencher with separate extractions of excess water. These have been separated because the recovered quench water is of good enough quality for re-use on the power station, whilst the deep FGD waste water is sent to the water treatment plant; Molecular sieves have been selected as the most appropriate equipment for dehydration of the CO2 prior to pipeline transportation; With the particular layout constraints of the Kingsnorth site, a split layout of the absorption and regeneration equipment is preferred over the compact layout. Further supporting documents for chapter 5 of the Key Knowledge Reference Book can be downloaded. Note this dataset is a duplicate of the reports held at the National Archive which can be found at the following link - http://webarchive.nationalarchives.gov.uk/20121217150421/http://decc.gov.uk/en/content/cms/emissions/ccs/ukccscomm_prog/feed/e_on_feed_/technical/technical.aspx
The collection consists of records of enquiries answered by the Land Survey from c.1939 to 1970, with a small number of earlier records. Pre c.1960 files relate mainly to economic mineral enquiries while files after that year relate increasingly to enquiries on geological site conditions. Enquiry records of former Leeds and Newcastle offices, relevant to UK(North), are held for c.1950 to 1992. Edinburgh Office enquiry files dated up to 1970 have been reviewed for retention/destruction and those of continuing informational or historical value have been retained as archives. Post 1970 files are confidential to BGS staff. Indexed on Land Survey Record Index (LSRI). Edinburgh enquiry files are referenced EE, (ex-Newcastle Office enquiries, EN). Covers Scotland and Northern England with concentrations in urban ares. All non-confidential data held by NGRC(North) is available to users.