Abstract: Processing heavy and bottom oil feedstocks affected the RFCC unit performance severely in SINOPEC Hainan Refining & Chemical Company due to high iron content deposited on the equilibrium catalyst (sometimes even higher than 10 000 μg/g), leading to lower conversion and target products yields and poor fluidization of the catalyst. To overcome the impact of the iron poisoning, CMT-1HN catalyst was developed by SINOPEC Research Institute of Petroleum Processing and commercial applied in above RFCC unit. The commercial application results showed that compared with the reference catalyst, CMT-1HN catalyst has a better bottom oil cracking ability and a higher gasoline yield, but lower dry gas and coke yields, indicating the better product selectivity and anti-metal deactivation ability of the catalyst. When the average contents of iron, sodium and calcium of feedstock increase to 35.35 μg/g, 4.73 μg/g and 8.11 μg/g, good performance is still maintained by using CMT-1HN catalyst.

Key words: FCC, Iron contamination, catalyst