CO Combustion Promoters: Past and Present

摘要

It has been over 30 years since the use of Pt-metal containing CO combustion promoters were introduced for commercial use in catalytic cracking processes.Their use has revolutionized FCC operations,allowing optimization through use of both partial and complete CO combustion operating modes.It was additives that were made for CO promoter technology that resulted in construction of separate catalyst addition vessels;this encouraged the use of other additives,now common in FCC operation: ZSM-5,SO_x and NO_x removal,bottoms cracking,GSR and other additives.