Speaker
Description
Gas transport in porous materials is typically described using flow models that assume a fixed pore structure and constant transport properties [1-4]. However, in materials where gas adsorption induces deformation, such assumptions become invalid [5-6]. In microporous materials, adsorption-induced swelling may alter pore geometry, transport porosity, and permeability, resulting in a significant coupling among adsorption, deformation, and flow that is still poorly characterized experimentally.
In this study, we proposed a novel experimental protocol to characterize adsorption effects on the internal pressure of Illite clay samples during CO2 transport. The original combination of three axial permeameters enables the measurement of the internal pressure evolution during CO2 adsorptive transport, in comparison with the inert transport of helium gas. Helium transport exhibits linear pressure propagation consistent with Klinkenberg’s theory, whereas CO2 produces systematic deviations that increase with pressure and distance along the sample. These deviations reflect progressive changes in transport properties caused by adsorption-induced swelling and lead to a redistribution of the internal pressure field.
This work demonstrates that adsorption-deformation coupling is not a secondary effect but a controlling mechanism for gas transport in microporous materials and must be explicitly included in predictive modeling frameworks.
Acknowledgements:
This work was funded by the Investissement d’Avenir French programme (ANR-16-IDEX-0002) within the framework of the E2S UPPA hub Newpores and by the Institut Universitaire de France.
References:
[1] H. Darcy, Les fontaines publiques de la ville de Dijon, Dalmont, Paris (1856).
[2] J. L. M. Poiseuille, C. R. Acad. Sci., 11, 961–967 (1840)
[3] W. Steckelmacher, Rep. Prog. Phys., 49, 1083–1107 (1986).
[4] L. J. Klinkenberg, API drilling and production practice, American Petroleum, 200–213 (1941).
[5] L. Perrier, F. Plantier, D. Grégoire, Rev. Sci. Instrum., 88, 035104 (2017).
[6] L. Perrier, G. Pijaudier-Cabot, D. Grégoire, Int. J. Solids Struct., 146, 192–202 (2018).
| Country | France |
|---|---|
| Acceptance of the Terms & Conditions | Click here to agree |
