Ruthenium and Platinum Catalysts Supported on Ce, Zr, Pr-O Mixed Oxides Prepared by Soft Chemistry for Acetic Acid Wet Air Oxidation

0311984 - ÚCHP 2009 RIV NL eng J - Journal Article
Gaálová, Jana - Rossignol, S. - Barbier Jr., J. - Mesnard, D. - Kappenstein, C. - Duprez, D.
Ruthenium and Platinum Catalysts Supported on Ce, Zr, Pr-O Mixed Oxides Prepared by Soft Chemistry for Acetic Acid Wet Air Oxidation.
[Rurthéniové a platinové katalyzátory na nosičích Ce-Zr-Pr-O pro vlhkou oxidaci vzduchem kyseliny octové.]
Applied Catalysis B - Environmental. Roč. 72, 1-2 (2007), s. 1-10. ISSN 0926-3373. E-ISSN 1873-3883
Institutional research plan: CEZ:AV0Z40720504
Keywords : sol-gel * catalytic wet air oxidation * acetic acid
Subject RIV: CI - Industrial Chemistry, Chemical Engineering
Impact factor: 4.651, year: 2007

These catalysts were prepared by conventional impregnation (5 wt.%) from platinum and ruthenium precursor salts. A screening of catalysts in CWAO at 200 °C under 2 MPa of partial oxygen pressure was performed and reveals that the best platinum catalyst is supported on pure ceria displaying large surface area. The mineralization of acetic acid solution reached 90% after 3 h of reaction on PtCe catalyst. For ruthenium catalysts, the highest conversion after 3 h of reaction has been reached by the Ru/Zr-Ce-O system (M3h = 88%). Ce(CO3)OH species, evidenced by FT-IR and XRD, were formed during the CWAO reaction essentially on well dispersed platinum catalysts supported on mixed oxides.

Nejlepší platinové a rutheniové katalyzátory vykazují přítomnost uhličitanových sloučenin na povrchu, které inhibují katalytickou reakci. Optimum v těchto případech připadá na katalyzátory se střední mobilitou kyslíku.
Permanent Link: http://hdl.handle.net/11104/0163168