Note: Determination of effective gas diffusion coefficients of stainless steel films with differently shaped holes using a Loschmidt diffusion cell

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DOIResolve DOI: http://doi.org/10.1063/1.3385673
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TypeArticle
Journal titleReview of Scientific Instruments
Volume81
Issue4
Pages046104-1046104-3
SubjectEffective gas diffusion coefficient; Loschmidt diffusion cell
AbstractIn this work, an in-house made Loschmidt diffusion cell is used to measure the effective O₂–N₂ diffusion coefficients through four porous samples of different simple pore structures. One-dimensional through-plane mas diffusion theory is applied to process the experimental data. It is found that both bulk diffusion coefficient and the effective gas diffusion coefficients of the samples can then be precisely determined, and the measured bulk one is in good agreement with the literature value. Numerical computation of three-dimensional mass diffusion through the samples is performed to calculate the effective gas diffusion coefficients. The comparison between the measured and calculated coefficient values shows that if the gas diffusion through a sample is dominated by one-dimensional diffusion, which is determined by the pore structure of the sample, these two values are consistent, and the sample can be used as a standard sample to test a gas diffusion measurement system.
Publication date
LanguageEnglish
AffiliationNRC Institute for Fuel Cell Innovation; National Research Council Canada
Peer reviewedYes
NPARC number16869219
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Record identifiera27db8ac-0214-4e61-a68a-4dff0afd6a91
Record created2011-02-15
Record modified2016-05-09
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