Physical properties and selective CO oxidation of coprecipitated CuO/CeO2 catalysts depending on the CuO in the samples
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Author list: Wongkaew A., Kongsi W., Limsuwan P.
Publisher: Hindawi
Publication year: 2013
Journal: Advances in Materials Science and Engineering (1687-8434)
Volume number: 2013
ISSN: 1687-8434
eISSN: 1687-8442
Languages: English-Great Britain (EN-GB)
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Abstract
This paper investigates the effects of CuO contents in the CuO-CeO 2 catalysts to the variation in physical properties of CuO/CeO 2 catalysts and correlates them to their catalytic activities on selective CO oxidation. The characteristic of crystallites were revealed by X-ray diffraction, and their morphological developments were examined with TEM, SEM, and BET methods. Catalytic performance of catalysts was investigated in the temperature range of 90-240ฐC. The results showed that the catalyst was optimized at CuO loading of 20 wt.%. This was due to the high dispersion of CuO, high specific surface area, small crystallite sizes, and low degree of CuO agglomeration. Complete CO conversion with near 100% selectivity was achieved at a temperature below 120ฐC. The optimal performance was seen as a balance between CuO content and dispersion observed with growth, morphology, and agglomeration of nanostructures. ฉ 2013 Akkarat Wongkaew et al.
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