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Mixed oxides of transition metals as catalysts for total ethanol oxidation

Jana Ludvíková, Květa Jirátová, and František Kovanda

Institute of Chemical Process Fundamentals of the Academy of Sciences of the Czech Republic v.v.i., Rozvojová 135, 165 02 Prague 6, Czech Republic

 

E-mail: ludvikova@icpf.cas.cz

Abstract: Oxides of transition metals could be suitable alternatives to catalysts based on noble metals in the oxidation processes used for the abatement of volatile organic compounds. Mixed oxides of transition metals can exhibit good efficiency and thermal stability, as well as being inexpensive. In this work, oxide catalysts containing various combinations of Cu, Co, Ni, Mn, and Al, grained or supported on oxidised aluminium foil Al2O3/Al, were studied in terms of their chemical and physical properties, including their chemical composition, porous structure, phase composition, reducibility, and activity in total ethanol oxidation. Ternary co-precipitated catalysts in the form of grains obtained from layered double hydroxide-like precursors were highly active, especially those containing manganese. Deposition of the selected precursors on an anodised aluminium foil-support afforded less active catalysts, mainly because the required metal molar ratios were not achieved, and insufficient amounts of metals were deposited. However, by controlling the preparation conditions (pH), higher loading of active components and higher catalytic activity were obtained.

Keywords: volatile organic compound – total oxidation – layered double hydroxides precursors – transition metals

Full paper is available at www.springerlink.com.

DOI: 10.2478/s11696-011-0127-x

 

Chemical Papers 66 (6) 589–597 (2012)

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