Solubility and diffusion of methane in coal strata
✍ Scribed by I. L. Éttinger
- Publisher
- Springer
- Year
- 1987
- Tongue
- English
- Weight
- 885 KB
- Volume
- 23
- Category
- Article
- ISSN
- 1573-8736
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📜 SIMILAR VOLUMES
Both methane and helium flow through solid coal by Knudsen diffusion, even at relatively high pressures. Knudsen permeabilities were determined for samples of Pittsburgh, Pocahontas No.3, and Oklahoma Hartshorne coals. The average permeability for dry methane was I.3 X 10e6 cm2/s for Pittsburgh coal
Diffusion of methane from threecoals ranging in rank from anthracite to HVA bituminous has been studied at initial methane pressures up to about 2.76 MPa (400 psi). Unsteadystate diffusion conditions existed, the methane pressure within the coal particle decreasing with time while the methane pressu