Catalytic reduction of nitric oxide with carbon monoxide on copper-cobalt oxides supported on nano-titanium dioxide
| Autor: | Zhiquan Tong, Yan Huang, Ming Huang, Xia Chen, Junfeng Zhang |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Environmental Engineering
Inorganic chemistry Metal Nanoparticles chemistry.chemical_element Nitric Oxide Catalysis law.invention chemistry.chemical_compound law Sulfur Dioxide Environmental Chemistry Calcination NOx General Environmental Science Electrochemical reduction of carbon dioxide Titanium Carbon Monoxide Water Oxides Selective catalytic reduction Cobalt General Medicine chemistry Titanium dioxide Oxidation-Reduction Copper Carbon monoxide |
| Zdroj: | Journal of Environmental Sciences. 21:1296-1301 |
| ISSN: | 1001-0742 |
| DOI: | 10.1016/s1001-0742(08)62418-3 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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