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首页> 外文期刊>Journal of thermal analysis and calorimetry >THERMAL ANALYSIS AND EPR STUDIES OF CARBON BLACK OXIDATION IN THE PRESENCE OF COPPER LOADED Y_2O_3-CeO_2-ZrO_2 CATALYST
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THERMAL ANALYSIS AND EPR STUDIES OF CARBON BLACK OXIDATION IN THE PRESENCE OF COPPER LOADED Y_2O_3-CeO_2-ZrO_2 CATALYST

机译：THERMAL ANALYSIS AND EPR STUDIES OF CARBON BLACK OXIDATION IN THE PRESENCE OF COPPER LOADED Y_2O_3-CeO_2-ZrO_2 CATALYST

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The activity of copper-free and copper-loaded 01Y_2O_3-10C_2-80ZrO_2 solid solutions towards carbon black combustion was studied using simultaneous thermogravimctric analysis and differential thermal analysis techniques coupled with gas chromatography. It was demonstrated that all studied catalysts lower the temperature of carbon black combustion. The selectivity of the catalytic reaction in CO_2 formation was 100%. The comparison of electron paramagnetic resonance (EPR) spectra of pure catalysts with those of the samples (catalysts mixed with carbon black) after catalysis allowed to evidence, despite of the strong oxidizing atmosphere, a thermal reduction by carbon of Fe~(3+) (impurities), Cu~(2+) and Zr~(4+) during the reaction. Moreover a new EPR signal appeared after catalytic test and was attributed to the presence of paramagnetic metal-carbon or/and metal-sulphur complexes.

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