Crossref journal-article
AIP Publishing
The Journal of Chemical Physics (317)
Abstract

With two high-pressure quasi-stationary diffusion cells, one depending upon ionization current measurement and the other scintillation detection of radioactive tracer activity, Fick's law diffusivities were determined for the diffusion of tracer amounts of krypton-85 in dense gases of krypton, argon, nitrogen, helium, carbon dioxide, and ethylene for isotherms about room temperature and densities to 15 mole/liter. In order to obtain absolute diffusivities, the cross-sectional area to length ratio of a primary standard porous plug consisting of a bundle of glass capillaries was precisely determined by weight-of-mercury and resistance-of-mercury calibrations. Stirring in the end chambers of the ionization cell was found to increase the determined diffusivity of krypton-85 in argon at 35°C by as much as 4.5% at a density of 12 mole/liter. The density—diffusivity product increases with density in the lower density region below about five moles per liter for all the isotherms. Extrapolations of the experimental data to low densities yield diffusivities which are in good agreement with low-pressure results by other investigators and Chapman—Enskog dilute-gas-theory predictions. Krypton self-diffusion coefficients calculated according to the real-gas modified Enskog theory with PVT properties, agree remarkably well with the experimental data over the density range investigated. The binary diffusivities of krypton-85 in dense base gases of argon, nitrogen, and ethylene are best predicted by the real-gas modified Enskog theory with PVT properties evaluated at a base-gas reduced temperature corresponding to the temperature of the system reduced by the mixed interaction potential temperature. In terms of precision of results and technological ease of operation the ionization cell proved to be superior to the scintillation cell.

Bibliography

Durbin, L., & Kobayashi, R. (1962). Diffusion of Krypton-85 in Dense Gases. The Journal of Chemical Physics, 37(8), 1643–1654.

Authors 2
  1. Leo Durbin (first)
  2. Riki Kobayashi (additional)
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Dates
Type When
Created 20 years, 7 months ago (Jan. 5, 2005, 10:29 p.m.)
Deposited 1 year, 6 months ago (Feb. 8, 2024, 4:02 p.m.)
Indexed 1 year, 6 months ago (Feb. 10, 2024, 6:43 a.m.)
Issued 62 years, 10 months ago (Oct. 15, 1962)
Published 62 years, 10 months ago (Oct. 15, 1962)
Published Print 62 years, 10 months ago (Oct. 15, 1962)
Funders 0

None

@article{Durbin_1962, title={Diffusion of Krypton-85 in Dense Gases}, volume={37}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.1733354}, DOI={10.1063/1.1733354}, number={8}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Durbin, Leo and Kobayashi, Riki}, year={1962}, month=oct, pages={1643–1654} }