Coal seams (soal deposits under rock formations) contain significant amounts of methane trapped in them.
The recovery rate of methane from coal seams is usually limited by the coal seam gas pressure and diffusion rate and, as a result, not all the available gas can be recovered. By injecting CO2 into the seam, further methane can be liberated.
This gas can be CO2, N2, flue gas or a combination thereof. The injection of captured CO2 to provide enhanced recovery of coalbed methane might serve to increase methane production whilst storing CO2, if the geography and economics are favourable.
03-03-2014
Source: ETH Zurich
01-10-2015
Source: Texas A&M University
31-08-2014
Source: Chinese Academy of Sciences
02-05-2015
Source: IEA Clean Coal Centre
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