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
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
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
work_keys_str_mv	AT aleksandragonciaruk kerogennanoscalestructureandco2adsorptioninshalemicropores AT matthewrhall kerogennanoscalestructureandco2adsorptioninshalemicropores AT michaelwfay kerogennanoscalestructureandco2adsorptioninshalemicropores AT christopherdjparmenter kerogennanoscalestructureandco2adsorptioninshalemicropores AT christopherhvane kerogennanoscalestructureandco2adsorptioninshalemicropores AT andreinkhlobystov kerogennanoscalestructureandco2adsorptioninshalemicropores AT ninoripepi kerogennanoscalestructureandco2adsorptioninshalemicropores
_version_	1718396504459182080

Kerogen nanoscale structure and CO2 adsorption in shale micropores

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