Development Of Desulfurization Additive For FCC Gasoline

Fluid catalytic cracking(FCC) unit has been the economy center of a refinery plant, with the developing of environment protection , it become very strict to the sulfur content in the gasoline and diesel. The majority refineries have to process import high sulfur oil because lack of crude oil. Thus, the sulfur content of gasoline and diesel beyond the command in a lots of FCC unit. Therefore, in the base of the principle about FCC processing and catalyst, it is an easy and cheap method to deal with the problem with additive .The FTL-1 desulfurization additive is composed by rare earth element and base metal , which for sulfur reduction of FCC during FCC process was tested and evaluated in a confined-fluidized-bed reaction apparatus. Under the test condition of 510℃ and the catalyst-to-oil being five ,The results show that adding 1.5 percent desulfurization additive, the sulfur content in the gasoline reduce 16.8 percent. The liquid production increase 1.0-2.0 percent .the distribution and quality of gasoline are not affected.