TY - JOUR
T1 - Ni-Mn bi-metal oxide catalysts for the low temperature SCR removal of NO with NH3
AU - Wan, Yaping
AU - Zhao, Wenru
AU - Tang, Yu
AU - Li, Liang
AU - Wang, Huijun
AU - Cui, Yunlong
AU - Gu, Jinlou
AU - Li, Yongsheng
AU - Shi, Jianlin
PY - 2014/4/27
Y1 - 2014/4/27
N2 - A series of nickel-manganese bi-metal oxide catalysts of different Ni/Mn ratios were prepared by a co-precipitation method for the low temperature selective catalytic reduction (SCR) of NO with NH3 in the presence of excess O2. The NO conversion over different catalysts decreased in the following sequence of Ni(0.4)-MnOx>MnOx>> Ni(1)-MnOx>Ni(2.5)-MnOx>NiOx. The Ni(0.4)-MnOx catalyst showed the highest catalytic activity, 85% of NO conversion at 95°C and 100% from 120 to 240°C, among the catalysts investigated. The TPR, XPS, NH3-TPD and in situ FTIR results revealed that Mn4+ was the main active species for SCR reaction and the addition of nickel species enhanced the surface concentration and acidity of Lewis acid sites. A possible synergetic catalytic effect was proposed for the low temperature SCR reaction through the electron transfer between Mn and Ni ions.
AB - A series of nickel-manganese bi-metal oxide catalysts of different Ni/Mn ratios were prepared by a co-precipitation method for the low temperature selective catalytic reduction (SCR) of NO with NH3 in the presence of excess O2. The NO conversion over different catalysts decreased in the following sequence of Ni(0.4)-MnOx>MnOx>> Ni(1)-MnOx>Ni(2.5)-MnOx>NiOx. The Ni(0.4)-MnOx catalyst showed the highest catalytic activity, 85% of NO conversion at 95°C and 100% from 120 to 240°C, among the catalysts investigated. The TPR, XPS, NH3-TPD and in situ FTIR results revealed that Mn4+ was the main active species for SCR reaction and the addition of nickel species enhanced the surface concentration and acidity of Lewis acid sites. A possible synergetic catalytic effect was proposed for the low temperature SCR reaction through the electron transfer between Mn and Ni ions.
KW - Lewis acid sites
KW - Low temperature NO-SCR
KW - Nickel and manganese mixed oxides
KW - Surface Mn active species
UR - https://www.scopus.com/pages/publications/84887594577
U2 - 10.1016/j.apcatb.2013.10.049
DO - 10.1016/j.apcatb.2013.10.049
M3 - 文献综述
AN - SCOPUS:84887594577
SN - 0926-3373
VL - 148-149
SP - 114
EP - 122
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
ER -