Premium
Catalyst sintering in fixed‐bed reactors: Deactivation rate and thermal history
Author(s) -
Blasco Valero,
Royo Carlos,
Monzón Antonio,
Santamaría Jesús
Publication year - 1992
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.690380209
Subject(s) - coke , dehydrogenation , sintering , catalysis , kinetics , thermal , degradation (telecommunications) , materials science , chemical engineering , chemistry , thermodynamics , metallurgy , organic chemistry , engineering , physics , telecommunications , quantum mechanics
An experimental study has been carried out of the in situ thermal degradation of a commercial dehydrogenation catalyst in a fixed‐bed reactor. The activity of catalyst particles sampled at different reactor positions after several reaction‐regeneration cycles has been related to their time‐temperature history, according to the following kinetics:\documentclass{article}\pagestyle{empty}\begin{document}$$ - da_0 /dt = 0.147{\rm exp}(- 73,600/RT)a_0^{2.2} $$\end{document}The above equation represents the loss of activity under coke‐free conditions, that is, activity loss due to sintering. The results of the study show that important differences in catalytic activity can be obtained for different positions of a fixed‐bed catalytic reactor after several operation‐regeneration cycles.