TY - JOUR
T1 - Experimental Study on the Pore Shape Damage of Shale Samples during the Crushing Process
AU - Liu, Kouqi
AU - Zakharova, Natalia
AU - Adeyilola, Adedoyin
AU - Zeng, Lianbo
N1 - Publisher Copyright:
© 2021 American Chemical Society. All rights reserved.
PY - 2021/2/4
Y1 - 2021/2/4
N2 - Using crushed shale samples to obtain pore information from the gas adsorption experiments is a widely used method. Previous studies have evaluated the impact of the particle size on the pore size distribution, but potential pore shape damage during the crushing process has not been thoroughly investigated. In this paper, we crushed and sieved the same shale samples into five different particle sizes and studied their pore structures using nitrogen adsorption. The results demonstrate that, as the particle size decreases, the shape of the hysteresis loop changes from H2 type (ink-bottle pore shape) to H3 type (slit pore shape). The hysteresis index decreases as the particle size decreases, indicating potential damage of the ink-bottle pores during crushing. As the particle size becomes smaller, the pore complexity first decreases and then remains steady. We, therefore, conclude that crushing shale samples into smaller particle sizes could damage the ink-bottle-shaped pores, which needs to be considered in sample preparation protocols for the gas adsorption analysis.
AB - Using crushed shale samples to obtain pore information from the gas adsorption experiments is a widely used method. Previous studies have evaluated the impact of the particle size on the pore size distribution, but potential pore shape damage during the crushing process has not been thoroughly investigated. In this paper, we crushed and sieved the same shale samples into five different particle sizes and studied their pore structures using nitrogen adsorption. The results demonstrate that, as the particle size decreases, the shape of the hysteresis loop changes from H2 type (ink-bottle pore shape) to H3 type (slit pore shape). The hysteresis index decreases as the particle size decreases, indicating potential damage of the ink-bottle pores during crushing. As the particle size becomes smaller, the pore complexity first decreases and then remains steady. We, therefore, conclude that crushing shale samples into smaller particle sizes could damage the ink-bottle-shaped pores, which needs to be considered in sample preparation protocols for the gas adsorption analysis.
UR - http://www.scopus.com/inward/record.url?scp=85099867320&partnerID=8YFLogxK
U2 - 10.1021/acs.energyfuels.0c03297
DO - 10.1021/acs.energyfuels.0c03297
M3 - Article
AN - SCOPUS:85099867320
VL - 35
SP - 2183
EP - 2191
JO - Energy and Fuels
JF - Energy and Fuels
SN - 0887-0624
IS - 3
ER -