Premium
One‐sided single‐pellet technique for adsorption and intraparticle diffusion
Author(s) -
Dog̈u Timur,
Yasyerli Nail,
Dog̈u Gülsen,
McCoy Ben J.,
Smith J. M.
Publication year - 1996
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.690420220
Subject(s) - adsorption , pellet , tracer , moment (physics) , diffusion , chemistry , thermodynamics , work (physics) , constant (computer programming) , boundary (topology) , boundary value problem , activated carbon , materials science , mathematics , physics , mathematical analysis , classical mechanics , computer science , nuclear physics , composite material , programming language
The one‐sided single‐pellet dynamic technique introduced in this article is shown to be a very effective and simple method for the analysis of adsorption and diffusion in porous solids. Moment expressions are presented for reversible and irreversible adsorption processes. Since the adsorption equilibrium constant is the only unknown parameter in the first moment expression, this parameter can be evaluated from a single set of pulse‐response experiments. This technique to evaluate the adsorption equilibrium constant is illustrated using ethylbromide as tracer. It is also shown that for a very strongly adsorbing tracer, such as 1,2‐dichloroethane in soil, modified moment expressions derived with a semiinfinite boundary condition are necessary unless a criterion developed in this work is satisfied.