Erdogan, AR;
Whitford, AC;
Underwood, TR;
Sellick, C;
Patel, R;
Skipper, NT;
Greenwell, HC;
(2023)
Swelling of compacted bentonite in organic solvents: Correlation of rate and extent of swelling with solvent properties.
Applied Clay Science
, 241
, Article 107000. 10.1016/j.clay.2023.107000.
(In press).
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Abstract
The swelling of clay minerals within shale formations during oil and gas exploration, and within compacted bentonite barriers for radioactive waste containment, presents a number of challenges to operators. Whilst much work has been devoted to understanding the interlayer swelling properties of clay mineral crystals, significantly less has been devoted to understanding coupled pore and interlayer swelling in reactive shale/compacted clay minerals. Here we study the swelling of compacted clay mineral tablets on exposure to a range of organic solvents, selected so that the effect of key solvent properties such as dielectric constant, density, octanol-water partition coefficient, viscosity and surface tension can be correlated with the swelling observed. We use a novel non-contact swelling meter to carry out the swelling tests, allowing us to access information on rate of swelling. Short-term swelling rate showed the strongest correlation to the solvent octanol-water partition coefficient. In long term swelling, good correlation was found between total linear swelling and viscosity, and the octanol-water partition coefficient.
| Type: | Article |
|---|---|
| Title: | Swelling of compacted bentonite in organic solvents: Correlation of rate and extent of swelling with solvent properties |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.clay.2023.107000 |
| Publisher version: | https://doi.org/10.1016/j.clay.2023.107000 |
| Language: | English |
| Additional information: | © 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/bync-nd/4.0/). |
| Keywords: | Shale stability, Clay mineral, Swelling, Organic solvent |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10171392 |
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