摘要
Reduction of sulfur content in FCC gasoline was studied in a fixed fluid bed (FFB) unit by using metal-modified LV-23 FCC catalyst. The results showed that the sulfur content in FCC gasoline could be reduced with LV-23 catalyst modified with zinc, palladium, zinc-palladium, zinc-cobalt, and zinc-nickel. Among these metals or metal combinations, palladium-containing catalyst was the most effective. Desulfurization of the heavy fraction of FCC gasoline was more effective than full-range gasoline under the same conditions with palladium-containing catalysts. A high reaction temperature was favorable to desulfurization, but it would reduce the yield of liquid product. After desulfurization reaction, the olefin content of product gasoline decreased while the aromatic and iso-alkane contents increased. Removal of thiophene and benzothiophene is higher.
Reduction of sulfur content in FCC gasoline was studied in a fixed fluid bed(FFB) unit by using metal-modified LV-23 FCC catalyst. The results showed that the sulfur content inFCC gasoline could be reduced with LV-23 catalyst modified with zinc, palladium, zinc-palladium,zinc-cobalt, and zinc-nickel. Among these metals or metal combinations, palladium-containingcatalyst was the most effective. Desulfurization of the heavy fraction of FCC gasoline was moreeffective than full-range gasoline under the same conditions with palladium-containing catalysts. Ahigh reaction temperature was favorable to desulfurization, but it would reduce the yield of liquidproduct. After desulfurization reaction, the olefin content of product gasoline decreased while thearomatic and iso-alkane contents increased. Removal of thiophene and benzothiophene is higher.
