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Binary physical adsorption of argon and nitrogen on fixed beds of activated silica gel
Author(s) -
Camp David T.,
Canjar Lawrence N.
Publication year - 1966
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.690120224
Subject(s) - argon , nitrogen , adsorption , mass transfer , chemistry , analytical chemistry (journal) , desorption , diffusion , silica gel , particle (ecology) , chromatography , thermodynamics , organic chemistry , physics , oceanography , geology
The physical adsorption and desorption of argon and nitrogen on fixed beds of 18 × 20 mesh silica gel at −78.5°C. and 1 atm. have been studied. Binary mixtures containing 5.52, 10.34, 51.0, 90.16, 95.13 mole % nitrogen, as well as pure argon and pure nitrogen, were used. Superficial gas velocities were varied from 0.10 to 0.27 ft./sec. Concentration vs. time curves were obtained at bed depths of 5.3, 8.6, and 12.0 in. Resistance to mass transfer from the gas stream to the outside surface of the particles was found to be negligible. The rate is limited due to mass transfer from the outside surface to the internal surface of the particle. The data were correlated by the integrated Rosen diffusion solution with D = 9.60 (10 −8 ) sq.ft./sec. or alternatively, by the Hiester and Vermeulen integrated model with k p = 0.23 sec. −1 .