WIDE WINDOW DENITRIFICATION OF V2O5/MICROPOROUS TiO2 UNDER SYNERGISTIC EFFECT OF DIELECTRIC BARRIER DISCHARGE PLASMA

ZHANG Yuqing; SUN Pengkun; TONG Hua

doi:10.13205/j.hjgc.202406010

Volume 42 Issue 6

Jun. 2024

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ZHANG Yuqing, SUN Pengkun, TONG Hua. WIDE WINDOW DENITRIFICATION OF V2O5/MICROPOROUS TiO2 UNDER SYNERGISTIC EFFECT OF DIELECTRIC BARRIER DISCHARGE PLASMA[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(6): 82-93. doi: 10.13205/j.hjgc.202406010

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ZHANG Yuqing, SUN Pengkun, TONG Hua. WIDE WINDOW DENITRIFICATION OF V₂O₅/MICROPOROUS TiO₂ UNDER SYNERGISTIC EFFECT OF DIELECTRIC BARRIER DISCHARGE PLASMA[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(6): 82-93. doi: 10.13205/j.hjgc.202406010

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WIDE WINDOW DENITRIFICATION OF V₂O₅/MICROPOROUS TiO₂ UNDER SYNERGISTIC EFFECT OF DIELECTRIC BARRIER DISCHARGE PLASMA

doi: 10.13205/j.hjgc.202406010

Department of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China

Received Date: 2023-09-13
Available Online: 2024-07-11

Abstract

Abstract

The narrow active window is one of the key limitations for vanadium-titanium based catalysts in selective catalytic reduction of NO_x with NH₃ under dielectric barrier discharge. The V₂O₅/microporous TiO₂ catalyst prepared by the hydrothermal method exhibited obvious wide NH₃-SCR active window characteristics under the synergistic effect of dielectric barrier discharge. By comparing the catalytic performance of empty tubes, 4V/TiO₂, and the vanadium-titanium based catalyst with the microporous carrier at room temperature, as well as the reaction behavior of the catalyst in N₂/O₂, N₂/O₂/NH₃, N₂/O₂/NO atmosphere, the catalytic reaction mechanism of the catalyst was analyzed. The sulfur and water resistance of the microporous-carrier catalyst was tested, and the microstructure of the material was analyzed by XRD, SEM, BET, XPS, TGA and FTIR. The results showed that the denitrification efficiency of the 4V/MP-TiO₂ catalyst was increased by 33.68% compared to conventional vanadium-titanium catalysts, and it maintained a denitrification efficiency of more than 80% in the range of 243 J/L to 442 J/L. It has good sulfur and water resistance while reducing energy consumption. This is due to the loose overall structure of microporous TiO₂, which has a rich pore structure, improving the pore volume of the carrier, as well as the dispersion of the catalyst, and more active adsorption sites for NH₃, which is conducive to broadening the active window. At the same time, microporous TiO₂ enhances the ability of the catalyst to oxidize NO, which facilitates the rapid SCR reaction when the specific input energy is high.
- dielectric barrier discharge,
- fast SCR,
- vanadium-titanium based catalyst,
- micropore,
- denitrification

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References(46)

References

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