钦妮共掺杂对 V-Mo/Ti 脱硝催化剂性能的影响.

The denitrification activity of catalyst can be improved by adding additives. In this paper, the Nd, Nb co-doped V-Mo/Ti De-NOx catalyst was prepared by impregnation method. The physical and chemical properties of the catalyst were analyzed by XRD, N8 -adsorption and desorption, H8 -TPR, XPS, NH3 -TPD. The results showed that the peak temperature of H 2 reduction of the catalyst modified by Nd and Nb moved to the direction of low temperature, indicating that the addition of Nd and Nb can adjust the dispersion degree of the active components of the catalyst to a certain extent. V-Mo-Nd-Nb/Ti catalyst has the higher Oa content, which is beneficial to its denitrification performance. The overall denitrification activity of Nd and Nb co-doped catalyst is better than that of V-Mo/Ti catalyst. The denitrification efficiency of the catalyst can reach 71. 8% at 210 oC,and the formation of N2O can also be reduced. Moreover, the catalyst also has excellent resistance to SO2 and H2O. After 28 h reaction, the denitration efficiency of the catalyst can still reach about 93 %. [ABSTRACT FROM AUTHOR]