Characterization of Porosity and Pore Accessibility of Vitrinite-Rich Bituminous and Subbituminous Coals by Small-Angle Neutron Scattering, Mercury Intrusion Porosimetry, and Low-Pressure N2 Adsorption

Cakmak, Ercan; Annamraju, Aparna; Mathews, Jonathan P.; He, Lilin; Gallego, Nidia; Lara-Curzio, Edgar

doi:10.1021/acs.energyfuels.2c02814

Title: Characterization of Porosity and Pore Accessibility of Vitrinite-Rich Bituminous and Subbituminous Coals by Small-Angle Neutron Scattering, Mercury Intrusion Porosimetry, and Low-Pressure N₂ Adsorption

Journal Article · Wed Dec 14 00:00:00 UTC 2022 · Energy and Fuels

DOI: https://doi.org/10.1021/acs.energyfuels.2c02814 · OSTI ID:1997801

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^[1]; Mathews, Jonathan P. ^[2];

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Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Pennsylvania State Univ., University Park, PA (United States)

Three bituminous and one subbituminous vitrinite-rich coals were characterized using small-angle neutron scattering with contrast matching, mercury intrusion porosimetry, and low-pressure N₂ adsorption techniques to quantify their porosity and pore accessibility in an effort to assess their solvent extractabilities, as a first approximation, for manufacturing useful end-products. The techniques revealed consistent results while complimenting one another. The total porosity was found to follow the coal rank with the lowest rank having the highest porosity within the studied coals. The amount of inaccessible pores was found to increase with rank for the bituminous coals studied here. Finally, the increase in the ease of accessibility and total porosity with decreasing rank suggested easier penetration of chemical reagents for solvent extraction, for example.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Fossil Energy and Carbon Management (FECM)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1997801

Journal Information:: Energy and Fuels, Journal Name: Energy and Fuels Journal Issue: 1 Vol. 37; ISSN 0887-0624

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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Title: Characterization of Porosity and Pore Accessibility of Vitrinite-Rich Bituminous and Subbituminous Coals by Small-Angle Neutron Scattering, Mercury Intrusion Porosimetry, and Low-Pressure N2 Adsorption

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Title: Characterization of Porosity and Pore Accessibility of Vitrinite-Rich Bituminous and Subbituminous Coals by Small-Angle Neutron Scattering, Mercury Intrusion Porosimetry, and Low-Pressure N₂ Adsorption