Dual Rate Kinetic Model of Fixed Bed Adsorber

by Russell G. Peel, Grad. Student; Dept. of Chem. Engrg., McMaster Univ., Hamilton, Ontario, Canada,
Andrew Benedek, Assoc. Prof.; Dept. of Chem. Engrg., McMaster Univ. Hamilton, Ontario, Canada,

Serial Information: Journal of the Environmental Engineering Division, 1980, Vol. 106, Issue 4, Pg. 797-813

Document Type: Journal Paper

Discussion: Ari Metin (See full record)

Abstract: An activated carbon adsorption model is presented which predicts performance of adsorption beds using parameters evaluated from batch tests. The proposed dual rate model assumes that a fraction of the total capacity is rapidly utilized in pores which are large with respect to the size of the diffusing species, and that following the rapid uptake phase the remaining capacity is utilized slowly and involves diffusion in pores of similar size to the adsorbate. The model is shown to describe experimental data very well and can be used to suggest why previous efforts at predictive modelling of adsorption beds have had only limited success.

Subject Headings: Adsorption | Data processing | Model tests | Activated carbon | Parameters (statistics) | Kinetics |

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