About: 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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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Množství uhličitanových sloučenin ve vlhké oxidaci vzduchem kyseliny octové na platinových katalyzátorech typu Pt/ Ce-Zr-Pr-O vzrůstá se schopností katalyzátoru přenášet kyslík. Tyto sloučeniny inhibují katalytickou reakci. (cs) 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. 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. (en)
Title	Characterizations of Platinum Catalysts Supported on Ce, Zr, Pr-oxides and Formation of Carbonate Species in Catalytic Wet Air Oxidation of Acetic Acid Characterizations of Platinum Catalysts Supported on Ce, Zr, Pr-oxides and Formation of Carbonate Species in Catalytic Wet Air Oxidation of Acetic Acid (en) Charakterizace platinových katalyzátorů na nosičích Ce-Zr-Pr-O a vznik uhličitanových sloučenin ve vlhké oxidaci vzduchem kyseliny octové (cs)
skos:prefLabel	Characterizations of Platinum Catalysts Supported on Ce, Zr, Pr-oxides and Formation of Carbonate Species in Catalytic Wet Air Oxidation of Acetic Acid Characterizations of Platinum Catalysts Supported on Ce, Zr, Pr-oxides and Formation of Carbonate Species in Catalytic Wet Air Oxidation of Acetic Acid (en) Charakterizace platinových katalyzátorů na nosičích Ce-Zr-Pr-O a vznik uhličitanových sloučenin ve vlhké oxidaci vzduchem kyseliny octové (cs)
skos:notation	RIV/67985858:_____/07:00311981!RIV09-AV0-67985858
http://linked.open...avai/riv/aktivita	Z
http://linked.open...avai/riv/aktivity	Z(AV0Z40720504)
http://linked.open...iv/cisloPeriodika	3-4
http://linked.open...vai/riv/dodaniDat	2009
http://linked.open...aciTvurceVysledku	Gaálová, Jana
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav chemických procesů AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	413369
http://linked.open...ai/riv/idVysledku	RIV/67985858:_____/07:00311981
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	acetic acid; cerium oxide; catalytic wet air oxidation (en)
http://linked.open.../riv/klicoveSlovo	cerium oxide acetic acid catalytic wet air oxidation
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[0606A87B9DA6]
http://linked.open...i/riv/nazevZdroje	Catalysis Today
http://linked.open...in/vavai/riv/obor	CI
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...UplatneniVysledku	2007
http://linked.open...v/svazekPeriodika	124
http://linked.open...iv/tvurceVysledku	Mikulová, Jana Barbier Jr., J. Rossignol, S. Duprez, D. Kappenstein, Ch.
http://linked.open...ain/vavai/riv/wos	248005900014
http://linked.open...n/vavai/riv/zamer	Investigation of multiphase reacting systems for the design of processes important in synthesis and preparation of novel materials, in energy production and in environmental protection
issn	0920-5861
number of pages	6 (xsd:int)
is http://linked.open...avai/riv/vysledek of	Characterizations of Platinum Catalysts Supported on Ce, Zr, Pr-oxides and Formation of Carbonate Species in Catalytic Wet Air Oxidation of Acetic Acid Characterizations of Platinum Catalysts Supported on Ce, Zr, Pr-oxides and Formation of Carbonate Species in Catalytic Wet Air Oxidation of Acetic Acid 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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