title: Multifunctional two-stage riser fluid catalytic cracking process.
abstract: This paper described the discovering process of some shortcomings of the conventional fluid catalytic cracking (FCC) process and the proposed two-stage riser (TSR) FCC process for decreasing dry gas and coke yields and increasing light oil yield, which has been successfully applied in 12 industrial units. Furthermore, the multifunctional two-stage riser (MFT) FCC process proposed on the basis of the TSR FCC process was described, which were carried out by the optimization of reaction conditions for fresh feedstock and cycle oil catalytic cracking, respectively, by the coupling of cycle oil cracking and light FCC naphtha upgrading processes in the second-stage riser, and the specially designed reactor for further reducing the olefin content of gasoline. The pilot test showed that it can further improve the product quality, increase the diesel yield, and enhance the conversion of heavy oil.
authors.affiliation: State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum, Qingdao, 266580 China.
authors.forename: Jinhong
authors.initials: J
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum, Qingdao, 266580 China.
authors.forename: Honghong
authors.initials: H
authors.lastname: Shan
authors.affiliation: State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum, Qingdao, 266580 China.
authors.forename: Xiaobo
authors.initials: X
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum, Qingdao, 266580 China.
authors.forename: Chunyi
authors.initials: C
authors.lastname: Li
authors.affiliation: State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum, Qingdao, 266580 China.
authors.forename: Chaohe
authors.initials: C
authors.lastname: Yang
keywords: Diesel; Fluid catalytic cracking; Gasoline upgrading; Heavy oil; Two-stage riser