Underground coal gasification research and development in the United States ⁎ ⁎This article has been authored by Lawrence Livermore National Security, LLC under contract No. DE-AC52-07NA27344 with the U.S. Department of Energy. Accordingly, the United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this article

Camp, David W.

doi:10.1016/b978-0-08-100313-8.00004-9

Cited by 2 publications

(1 citation statement)

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“…However, both the field trials and laboratory experiments were discontinued in the late 1980s because of the increased worldwide use and availability of natural gas and oil [30]. D.W. Camp summarized underground coal gasification research that took place in the United States from 1948 to 2015, including Controlled Retraction Injection Point (CRIP) field tests in the Rocky Mountain [31]. In recent years, a limited number of reports have been published concerning large-scale pilot systems operated by the reverse gasification process.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Reverse Underground Coal Gasification

et al. 2018

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Underground coal gasification (UCG) produces less pollution and is safer than traditional coal mining. In order to investigate the effects of different gasifying agents or comprehensive analyses of the characteristics of the gas components in the three zones for the reverse underground coal gasification process, a model test was carried out. The results showed that the oxygen concentration of a gasifying agent is recommended to be higher than 21%, which will lead to more combustible gases and a higher calorific value of gas. Higher flow rates and oxygen content generally afforded more desirable gas compositions and calorific values, with the latter as high as 1430.19 kcal/Nm3. For the enriched oxygen gasifying agent in the reverse gasification process, the flow increase from 10 to 20 Nm3/h affords a rapid increase in the growth rate of the flame front, from 1.80 to 4.88 m/day, which is much faster than that for the air gasifying agent. Increasing the gas injection rate and oxygen concentration will increase the growth rate of the flame front. This affects the distribution of the three zones and further leads to different characteristics of the gas components.

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Section: Introductionmentioning

confidence: 99%