TY - JOUR
T1 - A comprehensive investigation of influences of NO and O2 on N2O-SCR by CH4 over Fe-USY zeolite
AU - Shen, Qun
AU - Li, Landong
AU - He, Chi
AU - Tian, Hua
AU - Hao, Zhengping
AU - Xu, Zhi Ping
PY - 2009/9/7
Y1 - 2009/9/7
N2 - The catalytic reduction behaviors of N2O by CH4 have been investigated over Fe-USY catalyst by examining the influences of CH4, NO, O2, or their mixtures in detail. The observations show that NO and O2, which inevitably exist in the gases emitted from industrial sources, such as the nitric acid plant, inhibit the selective catalytic reduction of N2O by CH4 (N2O-CH4 SCR) to some degree, shifting the temperature for >90% N2O conversion to over 450 °C. The prohibition of O2 can be ascribed to its occupying active sites and oxidizing CH4-derived intermediates. The negative effect of NO is very prominent, inhibiting the N2O conversion by strongly occupying the active sites and gradually moving the reaction pathways from N2O-CH4 SCR to NO-assisted N2O decomposition, where the former is more efficient than the latter for N2O decomposition under the same operation conditions. In addition, the amount of reducing agent CH4 has also influenced the N2O conversion profile.
AB - The catalytic reduction behaviors of N2O by CH4 have been investigated over Fe-USY catalyst by examining the influences of CH4, NO, O2, or their mixtures in detail. The observations show that NO and O2, which inevitably exist in the gases emitted from industrial sources, such as the nitric acid plant, inhibit the selective catalytic reduction of N2O by CH4 (N2O-CH4 SCR) to some degree, shifting the temperature for >90% N2O conversion to over 450 °C. The prohibition of O2 can be ascribed to its occupying active sites and oxidizing CH4-derived intermediates. The negative effect of NO is very prominent, inhibiting the N2O conversion by strongly occupying the active sites and gradually moving the reaction pathways from N2O-CH4 SCR to NO-assisted N2O decomposition, where the former is more efficient than the latter for N2O decomposition under the same operation conditions. In addition, the amount of reducing agent CH4 has also influenced the N2O conversion profile.
KW - Fe-USY zeolite
KW - NO inhibition
KW - NO-CH SCR
KW - NO-CO SCR
KW - NO-assisted NO decomposition
UR - https://www.scopus.com/pages/publications/67651151499
U2 - 10.1016/j.apcatb.2009.05.034
DO - 10.1016/j.apcatb.2009.05.034
M3 - 文章
AN - SCOPUS:67651151499
SN - 0926-3373
VL - 91
SP - 262
EP - 268
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
IS - 1-2
ER -