The effect of megascopic texture on swelling of a low rank coal in supercritical carbon dioxide

Anggara, Ferian, Sasaki, Kyuro, Rodrigues, Sandra and Sugai, Yuichi (2014) The effect of megascopic texture on swelling of a low rank coal in supercritical carbon dioxide. International Journal of Coal Geology, 125 45-56. doi:10.1016/j.coal.2014.02.004


Author Anggara, Ferian
Sasaki, Kyuro
Rodrigues, Sandra
Sugai, Yuichi
Title The effect of megascopic texture on swelling of a low rank coal in supercritical carbon dioxide
Journal name International Journal of Coal Geology   Check publisher's open access policy
ISSN 0166-5162
1872-7840
Publication date 2014-05-01
Year available 2014
Sub-type Article (original research)
DOI 10.1016/j.coal.2014.02.004
Volume 125
Start page 45
End page 56
Total pages 12
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Language eng
Formatted abstract
Swelling experiments in supercritical CO2 have been conducted on two groups of samples of Miocene low rank coal with different megascopic textures (non-banded and banded) to address the different swelling behaviors. A block sample (30×10×10mm) from core samples was used and a strain gauge was attached to the long axis of the sample block to measure the length of change. The actual maceral group compositions between these samples were similar and high in huminite. However, there is a subtle difference in suberinite and corpohuminite maceral where banded samples consistently have higher compositions compared to non-banded ones. The experimental results showed that banded coal samples tend to have anisotropic linear swelling where swelling perpendicular to bedding plane was always greater than that parallel. In contrast, non-banded samples showed more isotropic behavior without much preference to bedding plane orientation. The ratio of perpendicular to parallel swelling was around 1.28 and 1.05 for banded and non-banded coal samples, respectively. The difference in swelling characteristics was concluded as a result of different megascopic textures of coal samples with respect to bedding orientation.
Keyword Low rank coal
Megascopic texture
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Earth Sciences Papers
Official 2015 Collection
 
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