Abstract
This paper deals with basic data on gas permeability and diffusion coefficients of coal and correlation with characteristics of the macropore such as Klinkenberg's constant, mean pore radius, effective pore area and porosity. This paper aims at the possibility of reduction in the number of numerical constants of the numerical analysis by means of several equations between the numerical parameters. Test pieces made of lump coal and compressed fine coals were prepared. Measurements were performed by flowing methane, nitrogen and other gases through the test pieces. On the basis of experimental results for compressed fine coals, empirical equations between gas permeability and characteristics of macropore were obtained. For lump coal, the factors were determined to express its heterogeneity in comparison with equations for fine coals. Permeability flowing methane was less by 10 approximately 15% than that of nitrogen. This amount of reduction can be explained on the basis of the difference in mean free pass of molecules. The effect of adsorption on macropore surfaces was not evident for gas permeability.
| Original language | Japanese |
|---|---|
| Pages (from-to) | 847-852 |
| Number of pages | 6 |
| Journal | Nihon Kogyokaishi |
| Volume | 103 |
| Issue number | 1198 |
| DOIs | |
| Publication status | Published - Jan 1 1987 |
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All Science Journal Classification (ASJC) codes
- Engineering(all)
Cite this
石炭におけるガス透過性と孔隙構造の関連性. / Sasaki, Kyuro; Miyakoshi, Hiroshi; Otsuka, Kazuo.
In: Nihon Kogyokaishi, Vol. 103, No. 1198, 01.01.1987, p. 847-852.Research output: Contribution to journal › Article
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TY - JOUR
T1 - 石炭におけるガス透過性と孔隙構造の関連性
AU - Sasaki, Kyuro
AU - Miyakoshi, Hiroshi
AU - Otsuka, Kazuo
PY - 1987/1/1
Y1 - 1987/1/1
N2 - This paper deals with the basic data on gas permeability and diffusion coefficients of coal and its correlation with the characteristics of the macropore such as Klinkenberg's constant, mean pore-radius, effective pore-area and porosity. Numerical researches on the flow and diffusion of gas in the coal seam have been extensively studies, however many numerical constants determined by experiments are necessary. This paper aims at stating the possibility of reduction the number of numerical constants of the numerical analysis by means of several relationship equations between the numerical parameters.Two kinds of test pieces, made of lump coal and compressed fine coals, were prepared. Measurements were performed by flowing methane, nitrogen and other gases through the test pieces. On the basis of experimental results for compressed finecoals, the empirical equations between gas permeability and characteristics of macropore were obtained. For lump coal, thef actors were determined to express its heterogeneity in comparison with the equations for compressed fine-coals. Permeability flowing methane was less by 10-15% than that of nitrogen. This amount of reduction can be explained on the basis of the difference inmean free-pass of molecule. The effect of adsorption on macropore surfaces of coal was not evident for gas per-meability.
AB - This paper deals with the basic data on gas permeability and diffusion coefficients of coal and its correlation with the characteristics of the macropore such as Klinkenberg's constant, mean pore-radius, effective pore-area and porosity. Numerical researches on the flow and diffusion of gas in the coal seam have been extensively studies, however many numerical constants determined by experiments are necessary. This paper aims at stating the possibility of reduction the number of numerical constants of the numerical analysis by means of several relationship equations between the numerical parameters.Two kinds of test pieces, made of lump coal and compressed fine coals, were prepared. Measurements were performed by flowing methane, nitrogen and other gases through the test pieces. On the basis of experimental results for compressed finecoals, the empirical equations between gas permeability and characteristics of macropore were obtained. For lump coal, thef actors were determined to express its heterogeneity in comparison with the equations for compressed fine-coals. Permeability flowing methane was less by 10-15% than that of nitrogen. This amount of reduction can be explained on the basis of the difference inmean free-pass of molecule. The effect of adsorption on macropore surfaces of coal was not evident for gas per-meability.
UR - http://www.scopus.com/inward/record.url?scp=0023579499&partnerID=8YFLogxK
UR - https://www.jstage.jst.go.jp/article/shigentosozai1953/103/1198/103_1198_847/_article
U2 - 10.2473/shigentosozai1953.103.1198_847
DO - 10.2473/shigentosozai1953.103.1198_847
M3 - 記事
VL - 103
SP - 847
EP - 852
JO - Nihon Kogyokaishi
JF - Nihon Kogyokaishi
SN - 0369-4194
IS - 1198
ER -