黄伟, 龚甍, 仵静, 李飞. 负载型非钒基脱硝催化剂的研究[J]. 工业催化, 2021,29(6): 40-43.
Huang Wei, Gong Meng, Wu Jing, Li Fei. Study on supported non-vanadium catalyst for selective catalytic reduction of nitric oxide by ammonia[J]. Industrial Catalysis, 2021,29(6): 40-43.
Study on supported non-vanadium catalyst for selective catalytic reduction of nitric oxide by ammonia
Huang Wei*, Gong Meng, Wu Jing, Li Fei
Xi'an Origin Chemical Technologies Co.,Ltd.,Xi'an 710061,Shaanxi,China
Abstract
Supported non-vanadium based denitrification catalyst was prepared using iron as main active component,transition-metal as modifier and aluminum trioxide as support.The influences of loading of active components,calcination heating rate,and active precursor on catalyst activity were investigated.Results showed that loading of active components and calcination heating rate have great influence on catalyst activity.Activity of the catalyst prepared with divalent iron salt was better than that with trivalent iron salt,among which the FeCl2 as precursor was the best,and the activity of cerium or tin doped catalyst increased from 65% to 87%.
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A series of Ti-Zr-V-O catalytic composite materials were prepared by sol-gel method. Effect of doping zirconium on catalytic NO x activities of Ti-V-O composite catalysts was investigated, and effects of doping zirconium on crystal form, crystalline morphology, chemical composition, functional group structure and specific surface area of titanium-vanadium composite oxides were characterized by X-ray diffraction (XRD), Scanning electron microscope (SEM), Energy spectrum analysis (EDS), Fourier infrared spectrum (FT-IR) and N 2 physical adsorption (BET method) respectively. The experimental results show that doping zirconium can inhibit anatase crystalline transformation, refine grain size, change the crystalline morphology and enhance the solid acidity of Ti-V-O composite catalysts. Consequently, the catalytic properties of Ti-Zr-V-O composite catalysts are improved. In the process of selective catalytic reduction of NO over Ti-Zr-V-O/ATS ceramics monolithic catalysts, using NH 3 as reducing agent, doping zirconium widens the catalytic active zone to high temperature area about 100℃, and the highest NO conversion at 300℃ is increased by 17.3%.
1. College of Material Science and Engineering, Nanjing University of Technology, Nanjing 210009, China; 2. College of Life Science and Pharmaccutical Engineering, Nanjing University of Technology, Nanjing 210009, China