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The firedamp released when coal mining contains approximately 20-60% by volume of methane. On the one hand, methane is a highly valuable energy carrier or raw material. On the other hand, it is a greenhouse gas which damages the climate. Therefore the attempt is being made to reduce the methane emissions into the atmosphere by maximum utilisation of the methane. The meaning of utilisation in this case is the conversion of methane into carbon dioxide which is substantially less detrimental to the climate.

In conclusion, it must be stated that there can only be a profit making investment when firedamp is used in gas motors or gas turbines. When considering the mobility of the plant or equipment, in which the methane is used to generate electricity and heat, the gas turbine is probably preferable because of its lighter construction, on the other hand, the explosion limit is increased due to the necessary precompression of the firedamp, so that only firedamp with a methane content of over 35% by volume and, due to the heat development during combustion, only firedamp with a methane content of less than 60% by volume will be used. These restricting factors call for the use of gas motors depending upon the situation in which they are to be used. .

Additional information

Authors: KUHL H, DMT Gesellschaft für Forschung und Prüfung mbH, Bochum (DE)
Bibliographic Reference: EUR 17180 DE (1997) 53pp., FS, ECU 10
Availability: Available from the (2)
ISBN: ISBN 92-827-9272-2
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