The Dependency of Diffusion Coefficients and Geometric Factor on the Size of the Diffusing Molecule: Observations for Different Clay-Based Materials
In order to investigate in more detail the relation between the size of diffusing molecules and their diffusion coefficients (and geometric factors), diffusion experiments with gases of different size and tritiated water (HTO) have been performed on different clayey samples (Boom Clay, Eigenbilzen S...
Saved in:
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2017-01-01
|
| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2017/8652560 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832545805524795392 |
|---|---|
| author | Elke Jacops Marc Aertsens Norbert Maes Christophe Bruggeman Rudy Swennen Bernd Krooss Alexandra Amann-Hildenbrand Ralf Littke |
| author_facet | Elke Jacops Marc Aertsens Norbert Maes Christophe Bruggeman Rudy Swennen Bernd Krooss Alexandra Amann-Hildenbrand Ralf Littke |
| author_sort | Elke Jacops |
| collection | DOAJ |
| description | In order to investigate in more detail the relation between the size of diffusing molecules and their diffusion coefficients (and geometric factors), diffusion experiments with gases of different size and tritiated water (HTO) have been performed on different clayey samples (Boom Clay, Eigenbilzen Sands, Opalinus Clay, Callovo-Oxfordian Clay, and bentonite with different dry densities). We observed that, for unreactive gases in clayey materials, the effective diffusion coefficient varies with the size of the diffusing molecule and this variation can be described by an exponential or a power law function. The variation of the geometric factor can also be described by an exponential function. The observed experimental relations can be used to estimate diffusion coefficients; by measuring experimentally in clay the effective diffusion coefficient of two unreactive dissolved gases with a different size, the diffusion coefficients of other dissolved gases (with a size in between the two measured gases) can be estimated by using the fitted exponential relationship. |
| format | Article |
| id | doaj-art-b492523eecf64598829fd6ce8e0b70fb |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-b492523eecf64598829fd6ce8e0b70fb2025-02-03T07:24:40ZengWileyGeofluids1468-81151468-81232017-01-01201710.1155/2017/86525608652560The Dependency of Diffusion Coefficients and Geometric Factor on the Size of the Diffusing Molecule: Observations for Different Clay-Based MaterialsElke Jacops0Marc Aertsens1Norbert Maes2Christophe Bruggeman3Rudy Swennen4Bernd Krooss5Alexandra Amann-Hildenbrand6Ralf Littke7Belgian Nuclear Research Centre (SCK•CEN), Mol, BelgiumBelgian Nuclear Research Centre (SCK•CEN), Mol, BelgiumBelgian Nuclear Research Centre (SCK•CEN), Mol, BelgiumBelgian Nuclear Research Centre (SCK•CEN), Mol, BelgiumKU Leuven, Heverlee, BelgiumRWTH Aachen University, Aachen, GermanyRWTH Aachen University, Aachen, GermanyRWTH Aachen University, Aachen, GermanyIn order to investigate in more detail the relation between the size of diffusing molecules and their diffusion coefficients (and geometric factors), diffusion experiments with gases of different size and tritiated water (HTO) have been performed on different clayey samples (Boom Clay, Eigenbilzen Sands, Opalinus Clay, Callovo-Oxfordian Clay, and bentonite with different dry densities). We observed that, for unreactive gases in clayey materials, the effective diffusion coefficient varies with the size of the diffusing molecule and this variation can be described by an exponential or a power law function. The variation of the geometric factor can also be described by an exponential function. The observed experimental relations can be used to estimate diffusion coefficients; by measuring experimentally in clay the effective diffusion coefficient of two unreactive dissolved gases with a different size, the diffusion coefficients of other dissolved gases (with a size in between the two measured gases) can be estimated by using the fitted exponential relationship.http://dx.doi.org/10.1155/2017/8652560 |
| spellingShingle | Elke Jacops Marc Aertsens Norbert Maes Christophe Bruggeman Rudy Swennen Bernd Krooss Alexandra Amann-Hildenbrand Ralf Littke The Dependency of Diffusion Coefficients and Geometric Factor on the Size of the Diffusing Molecule: Observations for Different Clay-Based Materials Geofluids |
| title | The Dependency of Diffusion Coefficients and Geometric Factor on the Size of the Diffusing Molecule: Observations for Different Clay-Based Materials |
| title_full | The Dependency of Diffusion Coefficients and Geometric Factor on the Size of the Diffusing Molecule: Observations for Different Clay-Based Materials |
| title_fullStr | The Dependency of Diffusion Coefficients and Geometric Factor on the Size of the Diffusing Molecule: Observations for Different Clay-Based Materials |
| title_full_unstemmed | The Dependency of Diffusion Coefficients and Geometric Factor on the Size of the Diffusing Molecule: Observations for Different Clay-Based Materials |
| title_short | The Dependency of Diffusion Coefficients and Geometric Factor on the Size of the Diffusing Molecule: Observations for Different Clay-Based Materials |
| title_sort | dependency of diffusion coefficients and geometric factor on the size of the diffusing molecule observations for different clay based materials |
| url | http://dx.doi.org/10.1155/2017/8652560 |
| work_keys_str_mv | AT elkejacops thedependencyofdiffusioncoefficientsandgeometricfactoronthesizeofthediffusingmoleculeobservationsfordifferentclaybasedmaterials AT marcaertsens thedependencyofdiffusioncoefficientsandgeometricfactoronthesizeofthediffusingmoleculeobservationsfordifferentclaybasedmaterials AT norbertmaes thedependencyofdiffusioncoefficientsandgeometricfactoronthesizeofthediffusingmoleculeobservationsfordifferentclaybasedmaterials AT christophebruggeman thedependencyofdiffusioncoefficientsandgeometricfactoronthesizeofthediffusingmoleculeobservationsfordifferentclaybasedmaterials AT rudyswennen thedependencyofdiffusioncoefficientsandgeometricfactoronthesizeofthediffusingmoleculeobservationsfordifferentclaybasedmaterials AT berndkrooss thedependencyofdiffusioncoefficientsandgeometricfactoronthesizeofthediffusingmoleculeobservationsfordifferentclaybasedmaterials AT alexandraamannhildenbrand thedependencyofdiffusioncoefficientsandgeometricfactoronthesizeofthediffusingmoleculeobservationsfordifferentclaybasedmaterials AT ralflittke thedependencyofdiffusioncoefficientsandgeometricfactoronthesizeofthediffusingmoleculeobservationsfordifferentclaybasedmaterials AT elkejacops dependencyofdiffusioncoefficientsandgeometricfactoronthesizeofthediffusingmoleculeobservationsfordifferentclaybasedmaterials AT marcaertsens dependencyofdiffusioncoefficientsandgeometricfactoronthesizeofthediffusingmoleculeobservationsfordifferentclaybasedmaterials AT norbertmaes dependencyofdiffusioncoefficientsandgeometricfactoronthesizeofthediffusingmoleculeobservationsfordifferentclaybasedmaterials AT christophebruggeman dependencyofdiffusioncoefficientsandgeometricfactoronthesizeofthediffusingmoleculeobservationsfordifferentclaybasedmaterials AT rudyswennen dependencyofdiffusioncoefficientsandgeometricfactoronthesizeofthediffusingmoleculeobservationsfordifferentclaybasedmaterials AT berndkrooss dependencyofdiffusioncoefficientsandgeometricfactoronthesizeofthediffusingmoleculeobservationsfordifferentclaybasedmaterials AT alexandraamannhildenbrand dependencyofdiffusioncoefficientsandgeometricfactoronthesizeofthediffusingmoleculeobservationsfordifferentclaybasedmaterials AT ralflittke dependencyofdiffusioncoefficientsandgeometricfactoronthesizeofthediffusingmoleculeobservationsfordifferentclaybasedmaterials |