Influence of Au/Fe2O3 and Au/TiO2 Catalysts Preparation on Their Activity in CO Oxidation by Oxygen and Water Gas Shift Reactions

• Autorzy: Jóźwiak W. K. , Kaczmarek E. , Ignaczak W.
• Konferencja: 10th Ukrainian-Polish Symposium "Theoretical and Experimental Studies of Interfacial Phenomena and Their Technological Applications", Lviv-Uzlissja, Ukraine
• Języki publikacji: EN

Abstrakty

EN

Supported Au/Fe2O3 and Au/TiO2 catalysts appear very active in both carbon monoxide oxidation by oxygen or water. The aim of this work was to find correlation between gold catalysts activity andmethods of their preparation (impregnation and deposition-precipitation), the influence of alkali ions additives and temperature of calcination. The physico-chemical properties of Au/Fe2O3 and Au/TiO2 catalysts were investigated by TPR, ToF-SIMS and catalytic activity methods. Carbon monoxide conversion degree in oxidation by oxygen is higher for Au/Fe2O3 than for Au/TiO2 catalyst, but the activity of gold catalysts in carbon monoxide oxidation by water is opposite. The most active catalyst was Au/Fe2O3 prepared by deposition-precipitation method with an addition of urea and those catalysts prepared by impregnation method with an addition of KOH. The analogically prepared Au/TiO2 catalyst exhibited comparable activity. The gold catalysts appear the most active after drying at 60 graduate C – the role of disordered catalyst structure and hydroxyl groups. The carbon monoxide conversion degree depends on the applied precipitate agent in the following order: KOH > Na2CO3 > NH3. The gold catalysts do not lose catalytic activity during long lasting tests (170 h) and do not suffer on the presence of moisture and chlorine in catalyst system. The impregnated Au(K)/Fe2O3 catalysts with a ratio Cl/Au = 4/1 – 8/1 show considerable activity.

Słowa kluczowe

EN

gold catalysts; carbon monoxide oxidation by oxygen or water; TPR; TOF-SIMS

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2008
• Tom: Vol. 82, nr 1-2
• Strony: 213--222
• Opis fizyczny: Bibliogr. 5 poz., rys.

Twórcy

autor

Jóźwiak W. K.

autor

Kaczmarek E.

autor

Ignaczak W.

• Institute of General and Ecological Chemistry, Technical University of Lodz, 90-924 Lodz, Zeromskiego 116, Poland,

Bibliografia

• 1.Bond G.C. And Thompson D.T., Catal. Rev.-Sci. Eng., 41, 321 (1999).
• 2.Kung H.H., Kung M.C. and Costello C.K., J. Catal., 216, 425 (2003).
• 3.Basińska A., Jozwiak W.K., Góralski J. and Domka F., Appl. Catal. A, 190, 107 (2000).
• 4.Jóźwiak W.K., Kaczmarek E. and Ignaczak W., Polish J. Envir. Stud., 14,127 (2005).
• 5.Jóźwiak W.K., Kaczmarek E., Maniecki T.R, Ignaczak W. and Maniukiewicz W.,Appl. Catal., in press