METHOD OF REGENERATING COKE-CONTAMINATED CATALYST WITH SIMULTANEOUS COMBUSTION OF CARBON MONOXIDE

摘要

A method for regenerating a coke-contaminated cracking catalayst with the simultaneous carefully controlled combustion of CO to CO2 within a regeneration zone to produce regenerated catalyst and flue gas. Novel features of the method include adding to the regeneration zone, independently of the cracking catalyst, a CO oxidation promoter and combusting CO to CO2 in the presence of the promoter and regenerated catalyst. The oxidation promoter may be added to the regeneration zone in amounts to control the CO concentration in the flue gas, a regeneration zone temperature, or the residual carbon concentration on regenerated catalyst.