title: Catalytic reduction of nitric oxide with carbon monoxide on copper-cobalt oxides supported on nano-titanium dioxide.
abstract: A series of copper-cobalt oxides supported on nano-titanium dioxide were prepared for the reduction of nitric oxide with carbon monoxide and characterized using techniques such as XRD, BET and TPR. Catalyst CuCoOx/TiO2 with Cu/Co molar ratio of 1/2, Cu-Co total loading of 30% at the calcination temperature of 350 degrees C formed CuCo2O4 spinel and had the highest activity. NO conversion reached 98.9% at 200 degrees C. Mechanism of the reduction was also investigated, N2O was mainly yielded below 100 degrees C, while N2 was produced instead at higher temperature. O2 was supposed to accelerate the reaction between NOx and CO for its oxidation of NO to give more easily reduced NO2, but the oxidation of CO by O2 to CO2 decreased the speed of the reaction greatly. Either SO2 or H2O had no adverse impact on the activity of NO reduction; however, in the presence of both SO2 and H2O, the catalyst deactivated quickly.
authors.affiliation: Department of Environmental Engineering, Xiangtan University, Xiangtan 411105, China. cxflower210@126.com
authors.forename: Xia
authors.initials: X
authors.lastname: Chen
authors.forename: Junfeng
authors.initials: J
authors.lastname: Zhang
authors.forename: Yan
authors.initials: Y
authors.lastname: Huang
authors.forename: Zhiquan
authors.initials: Z
authors.lastname: Tong
authors.forename: Ming
authors.initials: M
authors.lastname: Huang
mesh_terms: D002248:Carbon Monoxide / Q000737:chemistry*; D002384:Catalysis; D003035:Cobalt / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D053768:Metal Nanoparticles; D009569:Nitric Oxide / Q000737:chemistry*; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry*; D013458:Sulfur Dioxide / Q000737:chemistry; D014025:Titanium / Q000737:chemistry*; D014867:Water / Q000737:chemistry
chemical_list: D010087:Oxides; D014867:Water; D013458:Sulfur Dioxide; C009495:titanium dioxide; D009569:Nitric Oxide; D003035:Cobalt; D003300:Copper; D002248:Carbon Monoxide; D014025:Titanium; C000520:cuprous oxide; C060728:cobalt oxide