FCC Spent Catalyst Powder Compression Molding and Its Application in VOCs Catalytic Oxidation Purification
YU Tao1, CHEN Xian1, CUI Mifen1, TANG Jihai1,2, QIAO Xu1,2
1. School of Chemical Engineering, Nanjing University of Technology, Nanjing 211800, China;
2. State Key Laboratory of Material Chemistry Engineering, Nanjing University of Technology, Nanjing 211800, China
Abstract：Using fluid catalytic cracking (FCC) spent catalyst powder containing cyclone fine powder as raw material, its tableting process was studied. Bimetallic catalysts were subsequently prepared via the equal volume impregnation method, and their catalytic oxidation performance for volatile organic compounds (VOCs) was investigated. The results showed that under the conditions of a 6:4 mass ratio of FCC spent catalyst to γ-Al2O3, a dosage of 2.0% (mass fraction) of binder sesbania gum powder, a dosage of 4.0% (mass fraction) of pore-expanding agent hypromellose (HPMC), a molding pressure of 8 kN, a rotation speed of 10 r/min, a calcination temperature of 550 ℃, and a calcination time of 2 h, a sheet-like particle carrier with a radial strength of 108.8 N/cm, a specific surface area of 176.5 m2/g, and a pore size of 10.7 nm could be obtained. When the catalyst dosage was 5 g, the reaction space velocity was 6 000 mL/(g·h), the iron and manganese loading were 12% and 7.0% respectively, and the exhaust gas was treated at 440 ℃, the conversion rate of ethylbenzene at the reactor outlet could reach 98.9%, and the concentration of ethylbenzene in the exhaust gas could be reduced to 47.8 mg/m3, which met the exhaust emission standard. The resource utilization of FCC spent catalyst had been realized, and the purpose of waste control with waste had been achieved.
YU Tao,CHEN Xian,CUI Mifen et al. FCC Spent Catalyst Powder Compression Molding and Its Application in VOCs Catalytic Oxidation Purification[J]. Chemical Reaction Engineering and Technology, 2025, 41(4): 484-494.
