Temperature-programmed oxidation of coke deposited on cracking catalysts: combustion mechanism dependence

摘要

Coke deposited on catalytic cracking catalysts has been investigated by continuously monitoring evolved CO and CO_2 during temperature-programmed oxidation (TPO) in a 1/100 O_2/N_2 mixture. Analyses were carried out on spent samples recovered from an industrial catalytic cracker and On coke prepared in the laboratory by exposure of fresh catalyst to 1-hexene and cyclohexene at 500 deg.C. a maximum of three peaks in the rate of carbon dioxide evolution and one carbon monoxide peak are apparent in the PO spectra.