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Characterizations of Platinum Catalysts Supported on Ce, Zr, Pr-oxides and Formation of Carbonate Species in Catalytic Wet Air Oxidation of Acetic Acid
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SYSNO ASEP 0311981 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Characterizations of Platinum Catalysts Supported on Ce, Zr, Pr-oxides and Formation of Carbonate Species in Catalytic Wet Air Oxidation of Acetic Acid Title Charakterizace platinových katalyzátorů na nosičích Ce-Zr-Pr-O a vznik uhličitanových sloučenin ve vlhké oxidaci vzduchem kyseliny octové Author(s) Gaálová, Jana (UCHP-M) RID, SAI, ORCID
Rossignol, S. (FR)
Barbier Jr., J. (FR)
Duprez, D. (FR)
Kappenstein, C. (FR)Source Title Catalysis Today. - : Elsevier - ISSN 0920-5861
Roč. 124, 3-4 (2007), s. 185-190Number of pages 6 s. Language eng - English Country NL - Netherlands Keywords acetic acid ; cerium oxide ; catalytic wet air oxidation Subject RIV CI - Industrial Chemistry, Chemical Engineering CEZ AV0Z40720504 - UCHP-M (2005-2011) UT WOS 000248005900014 DOI 10.1016/j.cattod.2007.03.036 Annotation Catalytic wet air oxidation (CWAO) of aqueous solution of acetic acid (78 mmol L-1) was carried out with pure oxygen (2 MPa) at 200 degrees C in a stirred batch reactor on platinum supported oxide catalysts (Pt/oxide, oxide = CeO2, Zr0.1Ce0.9O2, Zr-0.1(Ce0.75Pr0.25)(0.9)O-2 and ZrO2). Platinum was loaded on oxides by impregnation (5 wt%), and then the catalysts were reduced under H-2. Homogenous dispersions of 2-3 nm metal crystallites were obtained. The catalytic activity depended on the ability of the support to resist to the formation of carbonates. Ce(CO3)OH species, determined by FT-IR and XRD, were rapidly formed during the CWAO reaction especially on mixed oxides. These carbonates were responsible to a drastic drop in catalytic performances. Amounts of carbonate species increase with the ability of the catalyst to transfer oxygen. Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2009
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