Oxidation of Perchloroethylene?Activity and Selectivity of Pt, Pd, Rh, and V2O5 Catalysts Supported on Al2O3, Al2O3?TiO2 and Al2O3?CeO2. Part 2

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F12%3A00379255" target="_blank" >RIV/67985858:_____/12:00379255 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.apcatb.2012.07.025" target="_blank" >http://dx.doi.org/10.1016/j.apcatb.2012.07.025</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apcatb.2012.07.025" target="_blank" >10.1016/j.apcatb.2012.07.025</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Oxidation of Perchloroethylene?Activity and Selectivity of Pt, Pd, Rh, and V2O5 Catalysts Supported on Al2O3, Al2O3?TiO2 and Al2O3?CeO2. Part 2

Popis výsledku v původním jazyce

The H2-TPR experiments proved that the enhanced reducibility is the key feature of the catalyst in PCE oxidation: both the activity and the selectivity followed the orders of catalysts? reducibility. The NH3-TPD measurements showed that the acidity is not the determining property of the catalyst in the PCE oxidation. After the 40.5 h stability test, no carbonaceous species were seen on the Pt/Al2O3?CeO2 catalyst?s surface. During the oxidation strong correlation between the water concentration in the feed and the HCl yield was seen. In the absence of oxygen, i.e. during destructive adsorption, the presence of water had even more pronounced effect on the HCl formation and on the catalysts? stability. The oxidation of PCE over the Pt/Al2O3 and Pt/Al2O3?CeO2 catalysts and in the presence of excess hydrogen proceeds via detaching the chlorine atoms before the breakage of the carbon?carbon double bond, and hence following the order of the lowest bond energy in each step.

Název v anglickém jazyce

Oxidation of Perchloroethylene?Activity and Selectivity of Pt, Pd, Rh, and V2O5 Catalysts Supported on Al2O3, Al2O3?TiO2 and Al2O3?CeO2. Part 2

Popis výsledku anglicky

The H2-TPR experiments proved that the enhanced reducibility is the key feature of the catalyst in PCE oxidation: both the activity and the selectivity followed the orders of catalysts? reducibility. The NH3-TPD measurements showed that the acidity is not the determining property of the catalyst in the PCE oxidation. After the 40.5 h stability test, no carbonaceous species were seen on the Pt/Al2O3?CeO2 catalyst?s surface. During the oxidation strong correlation between the water concentration in the feed and the HCl yield was seen. In the absence of oxygen, i.e. during destructive adsorption, the presence of water had even more pronounced effect on the HCl formation and on the catalysts? stability. The oxidation of PCE over the Pt/Al2O3 and Pt/Al2O3?CeO2 catalysts and in the presence of excess hydrogen proceeds via detaching the chlorine atoms before the breakage of the carbon?carbon double bond, and hence following the order of the lowest bond energy in each step.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CC - Organická chemie

OECD FORD obor

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Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2012

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Applied Catalysis B - Environmental

ISSN

0926-3373

e-ISSN

—

Svazek periodika

126

Číslo periodika v rámci svazku

SEP 25

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

10

Strana od-do

215-224

Kód UT WoS článku

000309692900024

EID výsledku v databázi Scopus

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