11th International Ceramics Congress

0323531 - ÚCHP 2009 RIV CH eng M - Monography Chapter
Gaálová, Jana - Rossignol, S. - Barbier Jr., J. - Kappenstein, C. - Duprez, D.
Catalysts for Wet Air Oxidation Based on Ce-Zr-Pr-O Mixed Oxides.
[Katalyzátory pro vlhkou oxidaci vzduchem na báze Ce-Zr-Pr-O.]
11th International Ceramics Congress. Zurich: Trans Tech Publications, 2006 - (Vincenzini, B.), s. 2089-2095. Advances in Science and Technology, Vol. 45. ISBN 978-3-908158-01-1
Institutional research plan: CEZ:AV0Z40720504
Keywords : sol-gel * catalytic wet air oxidation * platinum
Subject RIV: CF - Physical ; Theoretical Chemistry
http://www.cimtec-congress.org/

Sol-gel Zr0.1Ce0.9O2 and Zr0.1(Ce0.75Pr0.25)O2 mixed oxides and coprecipitated pure ceria CeO2 displaying the fluorine type structure have been used as platinum or ruthenium catalysts’ supports for catalytic wet air oxidation (CWAO) of aqueous solution of acetic acid. These catalysts were prepared by conventional impregnation (5 wt-%) from platinum and ruthenium precursor salts or by exchange in the case of ruthenium. A screening of catalysts in CWAO at 200°C under 2 MPa was performed and reveals that the best platinum catalyst is supported on pure ceria displaying large surface. For ruthenium catalysts, the highest conversion after 3 hours of reaction has been reached by the Ru/Zr-Ce-O system.

Na připravených nosičích Zr0.1Ce0.9O2 a Zr0.1(Ce0.75Pr0.25)O2, impregnovaných platinou a rutheniem, byla prováděna oxidace kyseliny octové. Platinové katalyzátory jsou aktivnější, když mají větší povrch. Z rutheniových byl nejlepší Ru/Zr-Ce-O systém.
Permanent Link: http://hdl.handle.net/11104/0171455