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Deep Ground and Energy: Carbon Sequestration and Coal Gasification

  • H. R. Thomas
  • L. J. Hosking
  • R. J. Sandford
  • R. Zagorščak
  • M. Chen
  • N. An
Conference paper
Part of the Environmental Science and Engineering book series (ESE)

Abstract

Deep coal reserves represent a valuable resource, both in terms of their potential for the sequestration of anthropogenic carbon dioxide and for energy extraction through underground coal gasification (UCG). This paper looks at the current field and research status of these technologies and, in line with on-going work at Cardiff University’s Geoenvironmental Research Centre (GRC), focuses special attention on the role of numerical modelling in advancing the research agenda. In response to poor carbon dioxide injectivity experienced in carbon sequestration trials and order-of-magnitude permeability losses caused by sorption induced coal swelling, the direction of work at the GRC is to improve the current understanding of the mechanical response of coal using a coupled thermal, hydraulic, chemical, mechanical modelling framework. Hence, the current focus of theoretical developments in this area are summarized. In relation to UCG, on-going developments to a comprehensive numerical model are discussed. The ultimate aim is to identify and quantify coupled mechanisms controlling syngas composition and production rate, heat and mass transport, geochemical reactions, geomechanical responses, and cavity growth to subsequently improve the state-of-the-art towards minimizing geoenvironmental risks.

Keywords

Coal Carbon sequestration Underground gasification 

Notes

Acknowledgements

The financial support provided by the Welsh European Funding Office (WEFO), through the FLEXIS project, is gratefully acknowledged.

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Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • H. R. Thomas
    • 1
  • L. J. Hosking
    • 1
  • R. J. Sandford
    • 1
  • R. Zagorščak
    • 1
  • M. Chen
    • 1
  • N. An
    • 1
  1. 1.Geoenvironmental Research Centre, Cardiff School of EngineeringCardiff UniversityCardiffUK

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