石炭におけるガス透過性と孔隙構造の関連性

Translated title of the contribution: Correlation between gas permeability and macropore structure of coal.

Kyuro Sasaki, Hiroshi Miyakoshi, Kazuo Otsuka

Research output: Contribution to journalArticle

1 Citation (Scopus)

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 languageJapanese
Pages (from-to)847-852
Number of pages6
JournalNihon Kogyokaishi
Volume103
Issue number1198
DOIs
Publication statusPublished - Jan 1 1987

Fingerprint

Gas permeability
Coal
Methane
Nitrogen
Diffusion in gases
Hydraulic conductivity
Numerical analysis
Porosity
Adsorption
Molecules
Gases

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 journalArticle

Sasaki, Kyuro ; Miyakoshi, Hiroshi ; Otsuka, Kazuo. / 石炭におけるガス透過性と孔隙構造の関連性. In: Nihon Kogyokaishi. 1987 ; Vol. 103, No. 1198. pp. 847-852.
@article{c12aa502319b4b3490b1a85db2821042,
title = "石炭におけるガス透過性と孔隙構造の関連性",
abstract = "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.",
author = "Kyuro Sasaki and Hiroshi Miyakoshi and Kazuo Otsuka",
year = "1987",
month = "1",
day = "1",
doi = "10.2473/shigentosozai1953.103.1198_847",
language = "Japanese",
volume = "103",
pages = "847--852",
journal = "Nihon Kogyokaishi",
issn = "0369-4194",
number = "1198",

}

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 -