Print Email Facebook Twitter Systematic Pore Characterization of Sub-Bituminous Coal from Sohagpur Coalfield, Central India Using Gas Adsorption Coupled with X-ray Scattering and High-Resolution Imaging Title Systematic Pore Characterization of Sub-Bituminous Coal from Sohagpur Coalfield, Central India Using Gas Adsorption Coupled with X-ray Scattering and High-Resolution Imaging Author Bhapkar, Pranay Vilas (Indian Institute of Technology Roorkee) Pradhan, Sarada Prasad (Indian Institute of Technology Roorkee) Chandra, D. (TU Delft Applied Geophysics and Petrophysics) Hazra, Bodhisatwa (CSIR : Central Instituteof Mining and Fuel Research, Dhanbad) Vishal, Vikram (Indian Institute of Technology Bombay) Date 2023 Abstract Pore characterization helps to estimate the coalbed methane recovery and carbon storage potential of the reservoir. Earlier research on the characteristics of coal pores has shown that coal has high hydrocarbon storage potential in the adsorbed state, but few studies have shown the influence of chemical heterogeneities and depth on the adsorption potential of the coal. With the objective of studying the effect of chemical variation, depth, and surface roughness on gas adsorption potential, this study combines coal composition analysis and adsorption-based pore characterization of coal and shale samples coupled with high-resolution imaging and X-ray scattering measurements. Variation in pore features is correlated with varying depth and composition. A decrease in the mesopore volume and surface area is observed with an increase in the depth and total organic content and inverse behavior is observed for micropores. Scanning electron microscopy images depict the change in the pore shape from semi-spherical OM pores to elongated pores with depth, and samples with high mineral content show a dominance of inter- and intraparticle pores. Fractal dimension values estimated from SAXS are notably higher than N2-LPGA-derived values (i.e.,─DS > DN) due to the incorporation of inaccessible pores, which reflects an increase of up to 62% in SAXS estimated mesopore volume and surface area. This study will provide a better approach to understand the impact of composition, depth, and surface roughness over the gas storage potential in coal reservoirs. To reference this document use: http://resolver.tudelft.nl/uuid:481a1093-8c7f-4e63-b653-d3711edc444b DOI https://doi.org/10.1021/acs.energyfuels.3c01007 Embargo date 2023-12-15 ISSN 0887-0624 Source Energy & Fuels, 37 (13), 9297-9308 Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public Part of collection Institutional Repository Document type journal article Rights © 2023 Pranay Vilas Bhapkar, Sarada Prasad Pradhan, D. Chandra, Bodhisatwa Hazra, Vikram Vishal Files PDF acs.energyfuels.3c01007.pdf 8.28 MB Close viewer /islandora/object/uuid:481a1093-8c7f-4e63-b653-d3711edc444b/datastream/OBJ/view