TPR-TPD studies of CuO/ZnAl2O4 catalyst prepared by hydrothermal method.

• Autorzy: Miśta W. , Zawadzki M. , Grabowska H.
• Konferencja: IV International Conference Catalysis and Adsorption in Fuel Processing and Environmental Protection, September 18-21, 2002, Kudowa Zdrój, Poland
• Języki publikacji: EN

Abstrakty

EN

Copper oxide supported on zinc aluminate spinel (ZnAl2O4) was prepared by hydrothermal treatment of copper nitrate, zinc acetate and basic aluminum nitrate solution. The physicochemical properties of the catalyst samples were investigated by X-ray diffraction (XRD), surface area measurements, temperature-programmed reduction (TPR) and desorption (TPD) of CO2. XRD of the fresh catalyst sample (calcined at 600C) indicated the presence of a mixture of poorly crystallized CuO and ZnAl2O4. The presence of two reducible copper species has been found on this fresh 10%CuO/ZnAl2O4 catalyst by TPR analysis. After subsequent calcinations in air at elevated temperatures some CuO disappeared with appearance of CuAl2O4 phase. TPD-CO2 results demonstrated the presence of three kinds of basic centers on the surface of ZnAl2O4.

Słowa kluczowe

EN

hydrothermal synthesis; thermal stability

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Prace Naukowe Instytutu Chemii i Technologii Nafty i Węgla Politechniki Wrocławskiej. Konferencje
• Rocznik: 2002
• Tom: Vol. 10, nr 57
• Strony: 407--412
• Opis fizyczny: Bibliogr. 10

Twórcy

autor

Miśta W.

autor

Zawadzki M.

autor

Grabowska H.

• Institute of Low Temperature and Structure Research, Polish Academy of Sciences, 50-950 Wrocław 50-950, Poland