Abstract: The catalytic cracking and hydrodesulfurization technology for producing more The catalytic cracking and hydrodesulfurization technology for producing more propylene and low sulfur fuel oil components in FCC unit was introduced, including revamping, industrial test and industrial application, so as to flexibly adjust the production plan to meet market demand. The MIP-CGP process was used as blank calibration, and the changes of Marine Fuel and Propylene (MFP) process operating conditions and product distribution were compared when the special catalyst accounted for 50% and 80% of the system storage. The results show that hydrogen distribution is improved, the propylene and isobutene content in LPG is greatly increased, the yield and selection of low-carbon olefins are improved, and dry gas and coke production are kept stable. FCC technology has been changed from high conversion rate to high selectivity, which can realize the efficient utilization of hydrocarbon resources, and can adjust production plan flexibly according to the change of market demand to realize the maximization of economic benefit.

Key words: Marine Fuel and Propylene (MFP) technology, proplyene, liquefied petroleum gas, catalytic cracking, Low sulfur marine bunker oil