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Müller, Norbert ; Jess, Andreas ; Moos, Ralf:
Direct sensing of coke deposits on fixed bed catalysts and the modeling of the electrical impedance and reaction kinetics.
2009
Veranstaltung: 11th International Symposium on CATALYST DEACTIVATION
, October 25 - 28, 2009
, Delft, The Netherlands.
(Veranstaltungsbeitrag: Kongress/Konferenz/Symposium/Tagung
,
Ohne Angabe
)
Abstract
The activity of heterogeneous catalysts in refinery processes is substantially influenced by formation of coke deposits. This study expands an in-situ method for direct determination of the coke loading in fixed bed catalysts by utilizing suspension balance techniques. Here, it is investigated whether it is possible to measure the coke content during coking and regeneration. Applied to a technical relevant Al2O3-based catalyst, it is shown that the electrical impedance of a catalyst pellet is strongly correlated with its degree of coke loading. A model correlates the impedance measurement and reaction kinetic.