Kerogen nanoscale structure and CO2 adsorption in shale micropores

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dc.contributor.authorGonciaruk, Aleksandraen
dc.contributor.authorHall, Matthew R.en
dc.contributor.authorFay, Michael W.en
dc.contributor.authorParmenter, Christopher D. J.en
dc.contributor.authorVane, Christopher H.en
dc.contributor.authorKhlobystov, Andrei N.en
dc.contributor.authorRipepi, Ninoen
dc.date.accessioned2021-05-17T19:43:05Zen
dc.date.available2021-05-17T19:43:05Zen
dc.date.issued2021-02-16en
dc.description.abstractGas 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.en
dc.description.notesWe would like to thank Dr. Elisabeth Steer at Nanoscale & Microscale Research Centre for providing training in SEM-MLA and technician team (David Mee and Dr. Jacob Uguna) at the Faculty of Engineering, University of Nottingham for assistance with hydrofluoric acid digestion. Funding: Gas Adsorption Analysis Suit equipment funded by the Engineering and Physical Sciences Research Council (EPSRC, EP/M000567/1), FIB-SEM and TEM work was supported by the EPSRC (EP/L022494/1) and the University of Nottingham. A. Khlobystov acknowledges EPSRC for funding (Established Career Fellowship EP/R024790/1), C. Vane publishes with permission of the Executive Director, British Geological Survey (UKRI).en
dc.description.sponsorshipEngineering and Physical Sciences Research Council (EPSRC)UK Research & Innovation (UKRI)Engineering & Physical Sciences Research Council (EPSRC) [EP/M000567/1]; EPSRCUK Research & Innovation (UKRI)Engineering & Physical Sciences Research Council (EPSRC) [EP/L022494/1, EP/R024790/1]; University of Nottinghamen
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1038/s41598-021-83179-zen
dc.identifier.issn2045-2322en
dc.identifier.issue1en
dc.identifier.other3920en
dc.identifier.pmid33594091en
dc.identifier.urihttp://hdl.handle.net/10919/103344en
dc.identifier.volume11en
dc.language.isoenen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.titleKerogen nanoscale structure and CO2 adsorption in shale microporesen
dc.title.serialScientific Reportsen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.dcmitypeStillImageen

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