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

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

doi:10.1021/acs.energyfuels.2c02814

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

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

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

Three bituminous and one subbituminous vitrinite-rich coals were characterized using small-angle neutron scattering with contrast matching, mercury intrusion porosimetry, and low-pressure N₂adsorption 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. The increase in the ease of accessibility and total porosity with decreasing rank suggested easier penetration of chemical reagents for solvent extraction, for example.

Original language	English
Pages (from-to)	191-203
Number of pages	13
Journal	Energy and Fuels
Volume	37
Issue number	1
DOIs	https://doi.org/10.1021/acs.energyfuels.2c02814
State	Published - Jan 5 2023

Funding

This research work was sponsored by the U.S. Department of Energy Fossil Energy and Carbon Management Program, Advanced Coal Processing Program, C4WARD project (FEAA155). This research used resources at the High Flux Isotope Reactor, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory. The critical review of Dr. Thomas R. Watkins is greatly appreciated. This manuscript has been authored by UT-Battelle, LLC, under Contract no. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a nonexclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allows others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doe-public-access-plan ). Acknowledgments

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Cakmak, E., Annamraju, A., Mathews, J. P., He, L., Gallego, N., & Lara-Curzio, E. (2023). 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. Energy and Fuels, 37(1), 191-203. https://doi.org/10.1021/acs.energyfuels.2c02814

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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",

abstract = "Three bituminous and one subbituminous vitrinite-rich coals were characterized using small-angle neutron scattering with contrast matching, mercury intrusion porosimetry, and low-pressure N2adsorption 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. The increase in the ease of accessibility and total porosity with decreasing rank suggested easier penetration of chemical reagents for solvent extraction, for example.",

author = "Ercan Cakmak and Aparna Annamraju and Mathews, {Jonathan P.} and Lilin He and Nidia Gallego and Edgar Lara-Curzio",

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Cakmak, E, Annamraju, A, Mathews, JP, He, L , Gallego, N & Lara-Curzio, E 2023, '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', Energy and Fuels, vol. 37, no. 1, pp. 191-203. https://doi.org/10.1021/acs.energyfuels.2c02814

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. et al.
In: Energy and Fuels, Vol. 37, No. 1, 05.01.2023, p. 191-203.

Research output: Contribution to journal › Article › peer-review

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AU - Annamraju, Aparna

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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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