TY - JOUR
T1 - Binary metal oxides supported on TiO2 for low-temperature selective catalytic reduction of NOx with NH3
AU - Wu, Bi Jun
AU - Liu, Xiao Qin
AU - Xiao, Ping
AU - Wang, Shu Gang
PY - 2008/8/15
Y1 - 2008/8/15
N2 - The manganese-based binary metal oxides supported on titanium dioxide (MnOx-A/TiO2) were prepared, where A means Fe2O3, WO3, MoO3 and Cr2O3. Their catalytic activity, N2 selectivity and SO2 poisonous tolerance were investigated. The catalytic performance at low temperature decreased in the following order: Mn-W/TiO2 > Mn-Fe/TiO2 > Mn-Cr/TiO2 > Mn-Mo/TiO2, while N2 selectivity: Mn-Fe/TiO2 > Mn-W/TiO2 > Mn-Mo/TiO2 > Mn-Cr/TiO2. In presence of 0.01% SO2 and 6% H2O, the NOx conversion of Mn-W/TiO2, Mn-Fe/ TiO2, Mn-Mo/TiO2 maintained 98.5%, 95.8% and 94.2% respectively after 8 h at 120°C at GHSV 12600 h-1. As effective promoters, WO3 and Fe2O3 can increase N2 selectivity and the resistance to SO2 of MnOx/TiO2 significantly. The Fourier transform infrared spectrum (FT-IR) spectra of NH3 showed that unlike Fe2O3, WO3 also provides part of Lewis acid sites. In presence of low concentration of SO2, Mn-W/TiO2 exhibited excellent catalytic performance for low temperature selective catalytic reduction of NO with NH3.
AB - The manganese-based binary metal oxides supported on titanium dioxide (MnOx-A/TiO2) were prepared, where A means Fe2O3, WO3, MoO3 and Cr2O3. Their catalytic activity, N2 selectivity and SO2 poisonous tolerance were investigated. The catalytic performance at low temperature decreased in the following order: Mn-W/TiO2 > Mn-Fe/TiO2 > Mn-Cr/TiO2 > Mn-Mo/TiO2, while N2 selectivity: Mn-Fe/TiO2 > Mn-W/TiO2 > Mn-Mo/TiO2 > Mn-Cr/TiO2. In presence of 0.01% SO2 and 6% H2O, the NOx conversion of Mn-W/TiO2, Mn-Fe/ TiO2, Mn-Mo/TiO2 maintained 98.5%, 95.8% and 94.2% respectively after 8 h at 120°C at GHSV 12600 h-1. As effective promoters, WO3 and Fe2O3 can increase N2 selectivity and the resistance to SO2 of MnOx/TiO2 significantly. The Fourier transform infrared spectrum (FT-IR) spectra of NH3 showed that unlike Fe2O3, WO3 also provides part of Lewis acid sites. In presence of low concentration of SO2, Mn-W/TiO2 exhibited excellent catalytic performance for low temperature selective catalytic reduction of NO with NH3.
KW - Binary metal oxides
KW - Fourier transform infrared spectrum
KW - Low-temperature selective catalytic reduction
KW - NH temperature programmed desorption
KW - Selective catalytic reduction of NO with NH
UR - http://www.scopus.com/inward/record.url?scp=51149107233&partnerID=8YFLogxK
M3 - 文章
AN - SCOPUS:51149107233
SN - 0258-8013
VL - 28
SP - 75
EP - 80
JO - Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering
JF - Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering
IS - 23
ER -