TY - JOUR
T1 - The effect of megascopic texture on swelling of a low rank coal in supercritical carbon dioxide
AU - Anggara, Ferian
AU - Sasaki, Kyuro
AU - Rodrigues, Sandra
AU - Sugai, Yuichi
N1 - Funding Information:
Grateful thanks are due to Joan S. Esterle who has critically reviewed the manuscript and provided a space to work in her Lab. We thank PT. Kaltim Prima Coal for providing coal samples. This study was supported in part by the GCOE-Kyushu University program . Finally, the authors wish to thank C. Ozgen Karacan and two anonymous reviewers for their insightful comments.
Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 2014/5/1
Y1 - 2014/5/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84896330349&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84896330349&partnerID=8YFLogxK
U2 - 10.1016/j.coal.2014.02.004
DO - 10.1016/j.coal.2014.02.004
M3 - Article
AN - SCOPUS:84896330349
VL - 125
SP - 45
EP - 56
JO - International Journal of Coal Geology
JF - International Journal of Coal Geology
SN - 0166-5162
ER -