The Dependency of Diffusion Coefficients and Geometric Factor on the Size of the Diffusing Molecule: Observations for Different Clay-Based Materials

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The Dependency of Diffusion Coefficients and Geometric Factor on the Size of the Diffusing Molecule: Observations for Different Clay-Based Materials. / Jacops, Elke; Aertsens, Marc; Maes, Norbert; Bruggeman, Christophe; Swennen, Rudy; Krooss, Bernhard; Amann-Hildenbrand, Alexandra; Littke, Ralf.

In: Geofluids, Vol. 2017, ID 8652560, 27.12.2017, p. 1-17.

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@article{749a34ebb84f46f9853a5ed3368f6647,
title = "The Dependency of Diffusion Coefficients and Geometric Factor on the Size of the Diffusing Molecule: Observations for Different Clay-Based Materials",
abstract = "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 (BoomClay, 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.",
keywords = "diffusing molecules, diffusion coefficients, gas, HTO, clay, bentonite",
author = "Elke Jacops and Marc Aertsens and Norbert Maes and Christophe Bruggeman and Rudy Swennen and Bernhard Krooss and Alexandra Amann-Hildenbrand and Ralf Littke",
note = "Score=10",
year = "2017",
month = "12",
day = "27",
doi = "10.1155/2017/8652560",
language = "English",
volume = "2017",
pages = "1--17",
journal = "Geofluids",
issn = "1468-8115",
publisher = "Wiley - John Wiley & Sons, Ltd",

}

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TY - JOUR

T1 - The Dependency of Diffusion Coefficients and Geometric Factor on the Size of the Diffusing Molecule: Observations for Different Clay-Based Materials

AU - Jacops, Elke

AU - Aertsens, Marc

AU - Maes, Norbert

AU - Bruggeman, Christophe

AU - Swennen, Rudy

AU - Krooss, Bernhard

AU - Amann-Hildenbrand, Alexandra

AU - Littke, Ralf

N1 - Score=10

PY - 2017/12/27

Y1 - 2017/12/27

N2 - 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 (BoomClay, 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.

AB - 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 (BoomClay, 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.

KW - diffusing molecules

KW - diffusion coefficients

KW - gas

KW - HTO

KW - clay

KW - bentonite

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/30378158

U2 - 10.1155/2017/8652560

DO - 10.1155/2017/8652560

M3 - Article

VL - 2017

SP - 1

EP - 17

JO - Geofluids

JF - Geofluids

SN - 1468-8115

M1 - ID 8652560

ER -

ID: 4379682