Water sorption and transport in Silurian shales

0550813 - ÚSMH 2023 RIV NL eng J - Článek v odborném periodiku
Švábová, Martina - Vorokhta, Maryna
Water sorption and transport in Silurian shales.
Journal of Petroleum Science and Engineering. Roč. 210, MAR 2022 (2022), č. článku 109980. ISSN 0920-4105. E-ISSN 1873-4715
Institucionální podpora: RVO:67985891
Klíčová slova: Water vapour sorption * Shale * Effective diffusivity * Kinetic models
Obor OECD: Physical chemistry
Impakt faktor: 5.168, rok: 2021
Způsob publikování: Omezený přístup
https://www.sciencedirect.com/science/article/pii/S092041052101593X

We have studied the transport of water in shales through gravimetric water vapour sorption experiments. Kinetic data have been evaluated and several kinetic models have been compared, with emphasis on time-dependent diffusivity models. The effective diffusivities as a function of relative pressure show an initial increase corresponding to the sorption to primary adsorption centres, followed by water cluster formation. The final decrease in effective diffusivity is connected with flattening of the pore-mouth meniscus. Introducing the flow rate kinetic parameter enables samples with different amounts of adsorbed water to be compared, showing that the highest value of the flow rate kinetic parameter is connected with the sample with largest surface area and the greatest micropore volume.
Trvalý link: http://hdl.handle.net/11104/0331905