Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10263640 | Chemical Engineering Science | 2005 | 11 Pages |
Abstract
An industrial FCC catalyst has been exposed in a MAT reactor to typical heavy fractions to obtain samples with different coke contents. These samples were investigated in the TAP reactor with toluene as probe molecule. A mathematical model has been developed that allows estimating diffusion coefficients in the meso- and micropores as well as the sorption parameters. Modeling of the TAP data provides insight into the deactivation mechanism due to coke deposition. At low coke content (<2.6wt%), the enthalpy for toluene adsorption drops rapidly with increasing coke content indicating preferential blocking of the strongest acid sites. At higher coke contents (>2.6wt%), blocking of the micropores occurs. The model describes the data adequately with physical meaningful parameters.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Y. Schuurman, C. Delattre, I. Pitault, J.P. Reymond, M. Forissier,