Adsorption and desorption of gaseous sorbates on a bidispersed particle with Freundlich isotherm. I. Theoretical analysis

Gray P.G. and Do D.D. (1989) Adsorption and desorption of gaseous sorbates on a bidispersed particle with Freundlich isotherm. I. Theoretical analysis. Gas Separation and Purification, 3 4: 193-200. doi:10.1016/0950-4214(89)80005-2


Author Gray P.G.
Do D.D.
Title Adsorption and desorption of gaseous sorbates on a bidispersed particle with Freundlich isotherm. I. Theoretical analysis
Journal name Gas Separation and Purification
ISSN 0950-4214
Publication date 1989-01-01
Sub-type Article (original research)
DOI 10.1016/0950-4214(89)80005-2
Volume 3
Issue 4
Start page 193
End page 200
Total pages 8
Subject 1500 Chemical Engineering
Abstract A model for the sorption of gases onto a single sorbent particle is developed in this paper. Important features incorporated in the model are macropore and micropore diffusional resistances, non-linear (Freundlich) isotherm on the macropore surface, variable particle geometry and external mass transfer resistance. Simulations of the adsorption and desorption dynamics are examined to determine the effects of isotherm non-linearity, particle geometry, macro-void capacity and γ (the ratio of macropore to micropore diffusional resistances). The effect of γ on the adsorption and desorption concentration profiles (in the macropore and micropore) is also shown. The range of validity of the bimodal diffusion control model (as well as its macropore and micropore control asymptotes) with respect to γ, is delineated. Furthermore, the asymmetry between desorption and adsorption (which is dependent on isotherm non-linearity and γ) is investigated, showing that it is not valid to apply the same criteria for micropore control to desorption, as one would apply to adsorption.
Keyword adsorption
bidispersed sorbent
desorption asymmetry
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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