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EFFICIENCY COMPARATOR: CARBON MONOXIDE CONVERTER EMISSION BY METALLIC OSMIUM SUPPORT IN TITANIUM DIOXIDE AND ZIRCONIUM DIOXIDE

Abstract

 The use of zirconia as a catalyst or as a support for metal catalysts has lately become increasingly popular. In recent years, studies of the preparation of doped zirconia producing high thermal stability. Doped zirconia in environmental application is significant to reduce carbon monoxides contribute to several environmental hazards to humans, including respiratory illness, and global warming one significant drawback to these materials such as platinum and gold is their high cost. Metallic osmium is proposed as a good candidate because it has been shown to be active for CO oxidation and is less expensive than gold and platinum. The osmium electron configuration (Xe) 4f14 5d6 6S2 is like platinum electron configuration (Xe) 4f14 5d9 6s1 . The high orbital d deficiencies cause a stronger interaction with negatively charged molecules. 10% of osmium and platinum were supported on TiO2 and ZrO2 prepared by solid by solid, Sol-Gel (SG) and incipient wetness impregnation (IWI) techniques. The catalysts were characterized by surface area analysis, Raman, SEM, X-ray diffraction (XRD), and Fourier transforms infrared spectroscopy. The characterization demonstrated that this nobel metal oxide phase is more dominant on the Sol-Gel and solid by solid impregnation support than on wetness impregnation. The complete oxidation of CO to CO2 could also be observed below 100°C for the Sol-Gel and solid by solid impregnation. The studies shown that ZrO2 Sol-Gel impregnation was more efficient and faster that TiO2 support

 CARLOS H. DELIZ

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