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- Title
Sublimation as a function of diffusion.
- Authors
Qian, Gang; Morgan, Nathan T.; Holmes, Russell J.; Cussler, E. L.; Blaylock, D. Wayne; Froese, Robert D. J.
- Abstract
Purification of large organic molecules in a tubular sublimator occurs by a combination of laminar flow, Knudsen diffusion, and volume diffusion. For laminar flow, the amount purified per area per driving force varies with pd2, where p is pressure and d is tube diameter. For Knudsen diffusion, it varies with d and is not a function of pressure. For volume diffusion, it is constant, consistent with experiment. This volume diffusion mechanism may offer an alternative explanation to slip flow for dilute gas transport of both organic semiconductors and common low molecular weight gases. © 2015 American Institute of Chemical Engineers AIChE J, 62: 861-867, 2016
- Subjects
SUBLIMATION (Chemistry); DIFFUSION; MOLECULAR shapes; LAMINAR flow; KNUDSEN flow
- Publication
AIChE Journal, 2016, Vol 62, Issue 3, p861
- ISSN
0001-1541
- Publication type
Article
- DOI
10.1002/aic.15119