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The mechanism of liquid‐phase resistance to gas absorption in a packed column
Author(s) -
Vivian J. Edward,
King C. Judson
Publication year - 1964
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690100218
Subject(s) - thermal diffusivity , penetration (warfare) , mass transfer , chemistry , packed bed , eddy diffusion , desorption , mass transfer coefficient , thermodynamics , mass diffusivity , chromatography , analytical chemistry (journal) , turbulence , adsorption , physics , operations research , engineering
The desorption of five sparingly soluble gases from water into air in a packed tower was studied at five different flow conditions. At 25°C. these systems represent a range of liquid‐phase diffusivity from 1.4 × 10 −5 to 6.3 × 10 −5 sq. cm./sec. The mass transfer coefficient was found to vary as the 0.5 power of liquid‐phase diffusivity in all cases. This result, obtained through the variation of diffusivity alone, is in agreement with the predictions of penetration theory and strongly suggests a penetration mechanism based on molecular processes and independent of eddy processes during a surface lifetime. A discussion of the nature of the diffusion and surface renewal process in flow over packing is included.