CO combustion catalysts. I. New FCC catalysts cut energy and increase activity. [Fluid-cracking catalysts consisting of Al/sub 2/O/sub 3/, Na/sub 2/O, Fe, and TV]

Because the flue gas from FCC (fluid-cracking catalysts) regenerators contains about 10 percent CO, two new catalysts have been developed to oxidize part of all of the CO to CO/sub 2/: the PCZ (partial-combustion zeolite) and the CCZ (complete-combustion zeolite) catalysts. The design and operational changes that the FCC catalysts required are summarized to indicate the need for the development of the new catalysts. A schematic of the CO oxidation test unit and the FCC pilot unit flow diagram for testing the performance of the new catalysts are given. The relative rates of CO oxidation, the CO oxidation activity, and the cracking activity and selectivity of the PCZ and CCZ catalysts are compared with conventional FCC catalysts. Operating and yield data from 19 units using these catalysts are reported to support the claims on their catalystic activity and the energy conservation possible by using the reaction heat from the oxidation of CO. (JSR)