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Energies 2009, 2(2), 456-476; doi:10.3390/en20200456

Early Ideas in Underground Coal Gasification and Their Evolution

School of Engineering, The University of Queensland, St. Lucia, QLD 4172, Australia
Received: 14 May 2009 / Revised: 10 June 2009 / Accepted: 12 June 2009 / Published: 24 June 2009
(This article belongs to the Special Issue Coal Gasification and Liquefaction)
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This article follows the development of early UCG (underground coal gasification) ideas. Historical facts are discussed mainly from the technological perspective and early experiments in UCG are analyzed. Our search for the first successful UCG experiment brings to light a new finding, which was commonly overlooked in previous reviews. We also outline the key role that engineer and inventor A. G. Betts played in introducing technologies utilizing unmined coal; his original ideas are visible in the first successful UCG experiments and in modern UCG technology.
Keywords: in situ utilization of coal; underground coal gasification; UCG development in situ utilization of coal; underground coal gasification; UCG development
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Klimenko, A.Y. Early Ideas in Underground Coal Gasification and Their Evolution. Energies 2009, 2, 456-476.

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