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A simple method of measuring gaseous diffusion coefficients

✍ Scribed by S.P.S. Andrew


Publisher
Elsevier Science
Year
1955
Tongue
English
Weight
306 KB
Volume
4
Category
Article
ISSN
0009-2509

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✦ Synopsis


In this paper a new and simple method of measuring gaseous diffusion coefficients is described.

The method was developed so as to enable coefllcients to be readily obtained with sufllcient accuracy for design purposes.

The method consists essentially in measuring the amount of equi-molar counter-diffusion occurring in a known time along a tube of known bore and length connecting two reservoirs initially containing gas mixtures of diierent concentrations. Values of diffusion coefhcients obtained by this method are compared with previous measurements for two of the gases, and satisfactory agreement is found. Coefllcients are given for the diffusion of CO,, NH,, SOs, Cl, and Brs in air at 20% and 760 mm Hg pressure. I&urn&-L'auteur decrit une m6thode simple et nouvelle pour mesurer rapidement et avec une precision suffisante, les coefficients de diffusion gaseuse. La methode comporte essentiellement la mesure de la diffusion B contre-courant d'un nombre &al de molecules, dans un tube (section et longueur connues) mkssitant deux mservolrs contenant au depart, des melanges gaseux de concentrations diff&entes. L'auteur trouve ses r&ultats en accord avec ceux de.9 auteurs prdc6dent.s. 11 donne les coefficients pour la diffusion de COs, NH,, SO,, Cl, et Brn dans l'air B 20" et sous 760 mm.


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