10.1186/2251-6832-3-16

Review of underground coal gasification technologies and carbon capture

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  • Stuart J Self1,
  • Bale V Reddy1,
  • Marc A Rosen*1,
  1. Faculty of Engineering and Applied Science, University of Ontario Institute of Technology, Oshawa, ON, L1H 7K4, CA
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Published in Issue 2012-08-31

How to Cite

Self, S. J., Reddy, B. V., & Rosen, M. A. (2012). Review of underground coal gasification technologies and carbon capture. International Journal of Energy and Environmental Engineering, 3(1 (December 2012). https://doi.org/10.1186/2251-6832-3-16
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Abstract

Abstract It is thought that the world coal reserve is close to 150 years, which only includes recoverable reserves using conventional techniques. Mining is the typical method of extracting coal, but it has been estimated that only 15% to 20% of the total coal resources can be recovered in this manner. If unrecoverable coal is considered in the reserves, the lifetime of this resource would be greatly extended, by perhaps a couple hundred years. Mining involves a large amount of time, resources, and personnel and contains many challenges such as drastic changes in landscapes, high machinery costs, elevated risk to personnel, and post-extraction transport. A new type of coal extraction method, known as underground coal gasification (UCG), that addresses most of the problems of coal mining is being investigated and implemented globally. UCG is a gasification process applied to in situ coal seams. UCG is very similar to aboveground gasification where syngas is produced through the same chemical reactions that occur in surface gasifiers. UCG has a large potential for providing a clean energy source through carbon capture and storage techniques and offers a unique option for CO 2 storage. This paper reviews key concepts and technologies of underground coal gasification, providing insights into this developing coal conversion method.

Keywords

  • underground gasification,
  • in situ coal gasification,
  • UCG,
  • clean energy,
  • coal technology,
  • carbon capture
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