A mathematical study of non-equimolar ternary gas diffusion

✍ Scribed by Ronald C. Tai; Hsin-kang Chang

• Book ID: 104272294
• Publisher: Springer
• Year: 1979
• Tongue: English
• Weight: 609 KB
• Volume: 41
• Category: Article
• ISSN: 1522-9602
• DOI: 10.1016/s0092-8240(79)80010-5

✦ Synopsis

In view of the increasing evidence that multicomponent diffusion effects could be significant in biological gas exchange systems, a non-equimolar film model of multicomponent diffusion was derived_ "Osmotic" ternary diffusion was studied for the gas systems He-N z-Oz, He-SF6 O2, and Nz-SF6-O2. Diffusional fluxes and concentration profiles were calculated under both the "square-root" and the "product" flux conditions. Results were also compared with those obtained using the equimolar flux condition. It was found that the greater the difference of the diffusibilities between the two active components in a system, the greater the osmotic fluxes, and also the more alinear the concentration profiles. These results support the suggestion that the "product" condition applies to molecular diffusion in free space, the "square-root" condition to molecular diffusion in pores, and the equimolar flux condition to closed diffusion systems.