This study aims to analyze the coking process and propose an effective method for the reutilization of fluid catalytic cracking(FCC)coke block.Herein,we analyzed the basic characteristics and chemical composition of F...This study aims to analyze the coking process and propose an effective method for the reutilization of fluid catalytic cracking(FCC)coke block.Herein,we analyzed the basic characteristics and chemical composition of FCC coke blocks.The results showed that the main components were carbon,oxygen,and aluminum,accounting for 60.8%,26.6%,and 11.5%,respectively.Under the conventional catalytic cracking reaction temperature from 500°C to 600°C,the formation of the first aromatic hydrocarbon was particularly important for the formation of coke.The condensation of oil-gas-entrained catalyst particles and their heavy components was the physical cause of coking,while the dehydrogenation condensation reaction of oil-gas heavy components was the chemical factor.In addition,the membrane prepared by powdered coke had excellent photothermal conversion ability,which could be heated to more than 110°C within 360 s under two fixed light intensities.The evaporation rate of photothermal water was 5.89 kg m 2 h−1,which has great industrial application potential.These works provide a novel and effective method of separation membrane for the reutilization of FCC coke blocks.展开更多
基金support from the National Natural Science Foundation of China(grant No.12202127)the Scientific Research Staring Foundation of Hainan University(grant No.KYQD(ZR)20042)+1 种基金Young Talents’Science and Technology Innovation Project of Hainan Association for Science and Technology(grant No.QCXM202027)Hainan Provincial Natural Science Foundation(grant Nos.520QN228 and 323MS009).
文摘This study aims to analyze the coking process and propose an effective method for the reutilization of fluid catalytic cracking(FCC)coke block.Herein,we analyzed the basic characteristics and chemical composition of FCC coke blocks.The results showed that the main components were carbon,oxygen,and aluminum,accounting for 60.8%,26.6%,and 11.5%,respectively.Under the conventional catalytic cracking reaction temperature from 500°C to 600°C,the formation of the first aromatic hydrocarbon was particularly important for the formation of coke.The condensation of oil-gas-entrained catalyst particles and their heavy components was the physical cause of coking,while the dehydrogenation condensation reaction of oil-gas heavy components was the chemical factor.In addition,the membrane prepared by powdered coke had excellent photothermal conversion ability,which could be heated to more than 110°C within 360 s under two fixed light intensities.The evaporation rate of photothermal water was 5.89 kg m 2 h−1,which has great industrial application potential.These works provide a novel and effective method of separation membrane for the reutilization of FCC coke blocks.
