Design of effective copper-cerium-zirconium catalyst for selective CO oxidation in hydrogen rich mixtures
Анотація
With the purpose of development of low-temperature oxide catalysts for selective CO oxidation in hydrogen-rich gas mixtures, catalytic properties have been examined of copper-cerium oxide system with different copper and cerium content and ratios based on industrial monoclinic zirconia. The optimum catalyst composition was found to be 10 %Сu – 23 %CeO2/ZrO2 providing total CO removing at the temperatures below 100оС and space velocities less than 12000 h-1. The state of the active components and support in the catalysts was investigated by a set of physico-chemical methods (XRD, XPS, BET). High activity and selectivity of the optimum catalyst were found to correlate with the quantity of copper phase interacting with zirconia and ceria surfaces (phase Cu1+Ce4+Zr4+O).
Посилання
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