Research on Mn-Based Catalysts Supported on Mixed Substrates for Wide Temperature SCR Denitration
LI Yuhao1, YONG Xiaolong1, MA Zitao1, TANG Minyuan1, SU Longlong2, ZHENG Yong2, WANG Qi1, LIAN Yixin3
1. School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, China;
2. Tongxing Environmental Protection Technology Company Limited, Hefei 230092, China;
3. National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, Xiamen University, Xiamen 361102, China
Abstract：To prepare a wide temperature denitration catalyst, a mixed support of TiO2 and ZSM-5 was obtained using mechanical grinding method, and supported MnOx/TiO2-ZSM-5 denitration catalysts was prepared by impregnation method. The prepared catalysts were characterized by X-ray diffraction (XRD), N2 isothermal adsorption-desorption, H2 temperature program reduction (H2-TPR), NH3 temperature programmed desorption (NH3-TPD) and NO temperature programmed desorption (NO-TPD). And the catalytic denitrification activity was investigated too. The results showed that MnOx/TiO2-ZSM-5 catalyst exhibited larger specific surface area, more active manganese species and more acid sites, which increased the adsorption capacity of the catalyst for NH3 and NO at low-temperature and NH3 at high-temperature, resulting in better catalytic activity for denitrification. The conversion of NO over MnOx/TiO2-ZSM-5 catalyst reached more than 99% at 200-350 ℃.
LI Yuhao,YONG Xiaolong,MA Zitao et al. Research on Mn-Based Catalysts Supported on Mixed Substrates for Wide Temperature SCR Denitration[J]. Chemical Reaction Engineering and Technology, 2023, 39(3): 211-217.
