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Catalytic reduction of nitric oxide with carbon monoxide on copper-cobalt oxides supported on nano-titanium dioxide

Chen, X and Zhang, JF and Huang, Y and Tong, ZQ and Huang, M (2009) Catalytic reduction of nitric oxide with carbon monoxide on copper-cobalt oxides supported on nano-titanium dioxide. JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA . ISSN 1001-0742

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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 N-2 was produced instead at higher temperature. O-2 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 O-2 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

Item Type:Article
Subjects:Material Science > Nanochemistry
ID Code:8304
Deposited By:CSMNT
Deposited On:27 Feb 2010 18:03
Last Modified:27 Feb 2010 18:03

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