Zhao R., Liang R., Li S., Song C., 2016, Low-Temperature Catalytic Reaction over Manganese- Cerium Composite Oxide Supported on Titania, Chemical Engineering Transactions, 55, 7-12.
A series of catalysts of manganese-cerium (Mn-Ce) active components supported on TiO2 prepared through sol-gel process were used for low-temperature catalytic reduction of NO with ammonia as reductant. The catalysts were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The results showed that the particle size of the catalysts is smaller and the active components are highly dispersed on the support. Doping Ce exhibited an inhibitory effect on the crystal transition of TiO2 from anatase to rutile phase. Furthermore, the TiO2 support got the entire anatase phase at 450°C, with an improved the property of the catalyst. The catalyst with the highest activity was obtained with a mass Ce(0.8)-Mn/TiO2 ratio of 0.15, andcalcinated at 450°C, providing 99.01% NO conversion at 140°C at a high space velocity of 67, 000 h-1. Withthe increasing of Ce-Mn loading amount and Ce/Mn molar ratio, the NO conversion increased firstly and then decreased. With the increasing of NH3/NO molar ratio in inlet flue gas, NO conversion increased firstly and then tended to be stable. .
