Catalytic oxidation of carbon monoxide by oxygen and nitrogen oxides on a copper-chromium oxide catalyst

Yuzefovich, G E; Gura, R. P.

doi:10.1007/bf02084194

Cited by 4 publications

(1 citation statement)

References 3 publications

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“…In the present case, the simultaneous coexistence with the CeO 2 layer of elements like Si, Ti, Fe and Al, for anodised aluminium, and Si, Fe and Cr, for Fecralloy monoliths, could improve the activity response towards CO oxidation, since mixed oxides based on them (Fe 2 O 3 , TiO 2 , CrO x , CeO 2 , etc.) have shown to be active catalysts and good supports in CO oxidation reactions [33][34][35][36][37][38]. This improvement is more significant for CeO 2 / Fecralloy monolith at low temperatures, reaching 50 % of conversion at 194°C.…”

Section: Catalytic Oxidation Of Comentioning

confidence: 99%

Au/CeO2 metallic monolith catalysts: influence of the metallic substrate

et al. 2013

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Ceria-based gold catalysts were successfully deposited on ferritic stainless steel (Fecralloy) and aluminium monoliths. The prepared monolithic and reference powder catalysts were characterized by means of S BET , X-ray diffraction, glow discharge optical emission spectroscopy and scanning electron microscopy-energy dispersive X-ray analysis techniques and tested in the CO oxidation reaction. Characterization results put in evidence the diffusion of cations from the catalytic layer on the surface of the monoliths to the metallic oxide scale and inversely, from the oxide scale to the catalysts, thus altering the catalytic formulation and affecting the CO oxidation properties of the catalytic device. The extension and nature of the modifications produced depend on the nature of the catalysts and the metallic substrate, as well as the reaction conditions applied. These facts must be considered when gold catalysts are supported on metallic-structured devices.

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Section: Catalytic Oxidation Of Comentioning

confidence: 99%

Au/CeO2 metallic monolith catalysts: influence of the metallic substrate

et al. 2013

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The difficulty of reducing nitrogen oxides in the presence of oxygen

Bleek

Berg

1980

J. Chem. Technol. Biotechnol.

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A hypothesis is made, based on the literature, which makes it very unlikely that NO can be selectively reduced by any reducing agent other than ammonia. The hypothesis is based upon the very fast reduction of NO2, even in the presence of oxygen, and an easy reoxidation of NO to NO2 which are both preferential to NO reduction in the presence of oxygen. The particular feature of ammonia originates from the fact that in parallel with this reaction, both reactants, under limiting conditions (defined by temperature), participate in a second scheme which leads to the formation of surface complexes dissociating into N2 and/or N2O. These surface complexes are most probably NH4NO2 and NH4NO3. In the presence of oxygen only this second scheme leads to the formation of N2 and or N2O and is even accelerated by the re‐oxidation of NO to NO2.

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