[Selective reduction of NOx with propene over SnO2/Al2O3 catalyst].
In the study, a series of SnO2/Al2O3 catalysts with various Sn loading were prepared by three different methods (impregnation, co-precipitation and single step sol-gel) and their catalytic activities for the selective reduction of NOx with propene were investigated. It was found that the catalyst preparation method as well as the Sn loading exerted a significant influence on the catalyst activity. Catalysts prepared by sol-gel method exhibited the highest activity toward NOx reduction and the optimal Sn loading is 5%. 5% SnO2/Al2O3 catalyst prepared by sol-gel method was found to be less inhibited by the presence of H20 than those prepared by other methods. Even in the co-presence of H2O and SO2, it still showed the highest activity. The increase of oxygen and propene concentration promotes the NOx reduction, respectively.
Liu
Zhi-ming
ZM
Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China.
Hao
Ji-ming
JM
Fu
Li-xin
LX
Li
Jun-hua
JH
Cui
Xiang-yu
XY
D000475:Alkenes / Q000737:chemistry; D000537:Aluminum Oxide / Q000737:chemistry*; D002384:Catalysis; D009589:Nitrogen Oxides / Q000737:chemistry*; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry; D014001:Tin / Q000737:chemistry*
D000475:Alkenes; D009589:Nitrogen Oxides; D014001:Tin; C013658:propylene; D000537:Aluminum Oxide; D010100:Oxygen