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Solvent counter‐diffusion in gas absorption
Author(s) -
Grenier Pierre
Publication year - 1966
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450440405
Subject(s) - diffusion , absorption (acoustics) , thermodynamics , solvent , diffusion equation , chemistry , gas phase , mechanics , physics , optics , organic chemistry , economy , economics , service (business)
The usual design equations for absorption towers are based on the assumption that only one component is diffusing in the gas phase: the counter‐diffusion of the solvent is ignored. A correction factor has been developed, based on a solution of the Stefan‐Maxwell diffusion equations for the case of two gases diffusing through a stagnant third one. The special case of equimolal counter‐diffusion is also considered. The correction factor is obtained by simultaneously solving two non‐linear equations. The system ammonia‐water‐air is used to illustrate the order of magnitude of the error the factor is intended to correct.