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Sulfur dioxide oxidation and nitric oxide decomposition over copper oxide on ʏ-alumina sorbents/catalysts: an infrared diffuse reflectance study

Copper (II) oxide on ʏ-alumina sorbents/catalysts generated from the thermolysis of supported copper acetylacetonate complex, have shown potential for the possible removal of SO2and NO in a gas stream. These supported metal complexes were prepared by the non-aqueous impregnation of the catalyst precursor {CU(acac)2} on alumina. Diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) was used to investigate the nature of interaction between the support and the π-electron structure of the complex. SO2 adsorption in the absence of added oxygen produced aluminum sulfate species even at 30ºC on all sorbents. The formation of sulfates without added oxygen is suggested to be due to the high dispersion of the metal. Oxidation of chemisorbed SO2 species yielded a copper sulfate band at 1125cm-1. NO adsorption shows that the copper exists primarily as Cu2+ ions on the catalysts. The decomposition of NO is inferred via the formation of a copper-nitrito complex identified at 1628cm-1 absorption band. A sulfated surface appears to stabilize the cupric ions thereby enhancing the NO adsorption.
Date01 July 1997
CreatorsPorbeni, Francis Ebikefe
PublisherDigitalCommons@Robert W. Woodruff Library, Atlanta University Center
Source SetsAtlanta University Center
Detected LanguageEnglish
SourceETD Collection for AUC Robert W. Woodruff Library

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