Journal
ENERGIES
Volume 2, Issue 2, Pages 456-476Publisher
MOLECULAR DIVERSITY PRESERVATION INTERNATIONAL-MDPI
DOI: 10.3390/en20200456
Keywords
in situ utilization of coal; underground coal gasification; UCG development
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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.
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