Sulfur dioxide oxidation and nitric oxide decomposition over copper oxide on ?-alumina sorbents/catalysts: an infrared diffuse reflectance study, 1997
Porbeni, Francis Ebikefe
1990-1999
Copper (II) oxide on ?-alumina sorbents/catalysts generated from the thermolysis of supported copper acetylacetonate complex, have shown potential for the possible removal of SO2 and 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 ?-electron structure of the complex. SO 2 adsorption in the absence of added oxygen produced aluminum sulfate species even at 30C 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 SO 2 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.
text
application/pdf
1997-07-01
thesis
Master of Science (MS)
Clark Atlanta University
Chemistry
Mitchell, Mark B.
Georgia--Atlanta
http://hdl.handle.net/20.500.12322/cau.td:1997_porbeni_francis_e
