Kerogen nanoscale structure and CO2 adsorption in shale micropores

Abstract Gas storage and recovery processes in shales critically depend on nano-scale porosity and chemical composition, but information about the nanoscale pore geometry and connectivity of kerogen, insoluble organic shale matter, is largely unavailable. Using adsorption microcalorimetry, we show t...

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Autores principales: Aleksandra Gonciaruk, Matthew R. Hall, Michael W. Fay, Christopher D. J. Parmenter, Christopher H. Vane, Andrei N. Khlobystov, Nino Ripepi
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Publicado: Nature Portfolio 2021
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Acceso en línea:https://doaj.org/article/edc68805c13c4e20a1aef7e6eda0f65f
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spelling oai:doaj.org-article:edc68805c13c4e20a1aef7e6eda0f65f2021-12-02T10:54:23ZKerogen nanoscale structure and CO2 adsorption in shale micropores10.1038/s41598-021-83179-z2045-2322https://doaj.org/article/edc68805c13c4e20a1aef7e6eda0f65f2021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-83179-zhttps://doaj.org/toc/2045-2322Abstract Gas storage and recovery processes in shales critically depend on nano-scale porosity and chemical composition, but information about the nanoscale pore geometry and connectivity of kerogen, insoluble organic shale matter, is largely unavailable. Using adsorption microcalorimetry, we show that once strong adsorption sites within nanoscale network are taken, gas adsorption even at very low pressure is governed by pore width rather than chemical composition. A combination of focused ion beam with scanning electron microscopy and transmission electron microscopy reveal the nanoscale structure of kerogen includes not only the ubiquitous amorphous phase but also highly graphitized sheets, fiber- and onion-like structures creating nanoscale voids accessible for gas sorption. Nanoscale structures bridge the current gap between molecular size and macropore scale in existing models for kerogen, thus allowing accurate prediction of gas sorption, storage and diffusion properties in shales.Aleksandra GonciarukMatthew R. HallMichael W. FayChristopher D. J. ParmenterChristopher H. VaneAndrei N. KhlobystovNino RipepiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Aleksandra Gonciaruk
Matthew R. Hall
Michael W. Fay
Christopher D. J. Parmenter
Christopher H. Vane
Andrei N. Khlobystov
Nino Ripepi
Kerogen nanoscale structure and CO2 adsorption in shale micropores
description Abstract Gas storage and recovery processes in shales critically depend on nano-scale porosity and chemical composition, but information about the nanoscale pore geometry and connectivity of kerogen, insoluble organic shale matter, is largely unavailable. Using adsorption microcalorimetry, we show that once strong adsorption sites within nanoscale network are taken, gas adsorption even at very low pressure is governed by pore width rather than chemical composition. A combination of focused ion beam with scanning electron microscopy and transmission electron microscopy reveal the nanoscale structure of kerogen includes not only the ubiquitous amorphous phase but also highly graphitized sheets, fiber- and onion-like structures creating nanoscale voids accessible for gas sorption. Nanoscale structures bridge the current gap between molecular size and macropore scale in existing models for kerogen, thus allowing accurate prediction of gas sorption, storage and diffusion properties in shales.
format article
author Aleksandra Gonciaruk
Matthew R. Hall
Michael W. Fay
Christopher D. J. Parmenter
Christopher H. Vane
Andrei N. Khlobystov
Nino Ripepi
author_facet Aleksandra Gonciaruk
Matthew R. Hall
Michael W. Fay
Christopher D. J. Parmenter
Christopher H. Vane
Andrei N. Khlobystov
Nino Ripepi
author_sort Aleksandra Gonciaruk
title Kerogen nanoscale structure and CO2 adsorption in shale micropores
title_short Kerogen nanoscale structure and CO2 adsorption in shale micropores
title_full Kerogen nanoscale structure and CO2 adsorption in shale micropores
title_fullStr Kerogen nanoscale structure and CO2 adsorption in shale micropores
title_full_unstemmed Kerogen nanoscale structure and CO2 adsorption in shale micropores
title_sort kerogen nanoscale structure and co2 adsorption in shale micropores
publisher Nature Portfolio
publishDate 2021
url https://doaj.org/article/edc68805c13c4e20a1aef7e6eda0f65f
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AT christopherdjparmenter kerogennanoscalestructureandco2adsorptioninshalemicropores
AT christopherhvane kerogennanoscalestructureandco2adsorptioninshalemicropores
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