A method and apparatus for the
cracking of a
petroleum oil feedstock to produce a desulfurized full-range
gasoline product. The
petroleum oil feedstock is contacted with a base
cracking catalyst and an FCC additive in an FCC unit, wherein the catalyst includes a stable Y-type
zeolite and a rare-earth
metal oxide and the additive includes a shape selective
zeolite. The catalyst, additive and
petroleum oil feedstock can be contacted in a down-flow or riser
fluid catalytic cracking unit, that can also include a regeneration zone, a separation zone, and a stripping zone. The FCC unit includes an integrated control and
monitoring system that monitors at least one parameter selected from FCC operating parameters, feed rate, feedstock properties, and product
stream properties, and adjusts at least one parameter in response to the measured parameter to increase production of desulfurized products.