TY - JOUR
T1 - Preparation of amorphous MnOx/TiO2 catalyst and its performance in low temperature NH3-SCR
AU - Wang, Liang Liang
AU - Wang, Ming Hong
AU - Fei, Zhao Yang
AU - Zhang, Zhu Xiu
AU - Chen, Xian
AU - Tang, Ji Hai
AU - Cui, Mi Fen
AU - Qiao, Xu
N1 - Publisher Copyright:
© 2017, Science Press. All right reserved.
PY - 2017/8/1
Y1 - 2017/8/1
N2 - MnOx/TiO2 catalysts were prepared by spontaneous deposition, co-precipitation and impregnation methods, respectively. The structure and properties of the MnOx/TiO2 catalysts were studied by means of XRD, TEM, N2 adsorption-desorption, XPS, H2-TPR and NH3-TPD. The activity of the catalysts in the selective catalytic reduction of NO was investigated. The results showed that the MnOx/TiO2(s) catalyst prepared by the spontaneous deposition method had a completely amorphous structure and a strong interaction between Mn and Ti, showed stronger redox ability than other two catalysts. In addition, the MnOx/TiO2(s) catalyst exhibited larger surface area, more surface acid sites, which were beneficial to NH3 adsorption and activation, as well as the high Mn4+ and adsorbed oxygen content of catalyst surface, which could greatly enhance the activity for NO oxidation to NO2, as a result, facilitating the “fast-SCR” reaction. Thus, a superior denitrification activity was exhibited over MnOx/TiO2(s) catalyst. For MnOx/TiO2(s) catalyst, the conversion of NO reached 92.8% at 150℃ and retained over 90% in the range of 150-350℃. Moreover, the MnOx/TiO2(s) catalyst also showed strong resistance to H2O and SO2 poisoning.
AB - MnOx/TiO2 catalysts were prepared by spontaneous deposition, co-precipitation and impregnation methods, respectively. The structure and properties of the MnOx/TiO2 catalysts were studied by means of XRD, TEM, N2 adsorption-desorption, XPS, H2-TPR and NH3-TPD. The activity of the catalysts in the selective catalytic reduction of NO was investigated. The results showed that the MnOx/TiO2(s) catalyst prepared by the spontaneous deposition method had a completely amorphous structure and a strong interaction between Mn and Ti, showed stronger redox ability than other two catalysts. In addition, the MnOx/TiO2(s) catalyst exhibited larger surface area, more surface acid sites, which were beneficial to NH3 adsorption and activation, as well as the high Mn4+ and adsorbed oxygen content of catalyst surface, which could greatly enhance the activity for NO oxidation to NO2, as a result, facilitating the “fast-SCR” reaction. Thus, a superior denitrification activity was exhibited over MnOx/TiO2(s) catalyst. For MnOx/TiO2(s) catalyst, the conversion of NO reached 92.8% at 150℃ and retained over 90% in the range of 150-350℃. Moreover, the MnOx/TiO2(s) catalyst also showed strong resistance to H2O and SO2 poisoning.
KW - Amorphous phase
KW - HO/SO resistance
KW - Low-temperature selective catalytic reduction
KW - Spontaneous deposition method
UR - http://www.scopus.com/inward/record.url?scp=85032816582&partnerID=8YFLogxK
M3 - 文章
AN - SCOPUS:85032816582
SN - 2097-213X
VL - 45
SP - 993
EP - 1000
JO - Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology
JF - Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology
IS - 8
ER -