DEACTIVATION KINETICS AND MODELING OF COKE REMOVAL UNDER SUPERCRITICAL CONDITIONS FOR THE EXAMPLE OF ETHYLBENZENE DISPROPORTIONATION

Deactivation kinetics and coke removal kinetics were derived from expe rimental studies on the disproportionation of ethylbenzene with a prot onated Y-faujasite (Z-14) in a loop reactor under supercritical condit ions. Derivation of the steady stare kinetics of ethylbenzene dispropo rtionation permitted determination of the catalyst activity. At small educt mole fractions of ethylbenzene, owing to the modest removal of c oke the deactivation kinetics can be described by a power relationship . The rate of coke removal can be correlated with the activity and the deactivation rate of the catalyst.