WO3/CeO2-ZrO2, a promising catalyst for selective catalytic reduction (SCR) of NOx with NH3 in diesel exhaust.
A WO3/CeO2-ZrO2 catalyst system was discovered for selective catalytic reduction of NOx with NH3; the catalyst (10 wt% WO3 loading) showed nearly 100% NOx conversion in a temperature range of 200-500 degrees C, at a space velocity of 90 000 h(-1) in a simulated diesel exhaust containing 550 ppm NOx (NO : NO2 feed ratio at 1.0), 10 vol% H2O and 10 vol% CO2; the catalyst also exhibited high temperature stability.
Li
Ye
Y
Dalian Institute of Chemical Physics, Dalian 116023, China. liyeok@dl.cn
Cheng
Hao
H
Li
Deyi
D
Qin
Yongsheng
Y
Xie
Yuming
Y
Wang
Shudong
S