Partial oxidation of ethanol over ZrO2-supported vanadium catalysts

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F17%3A39902740" target="_blank" >RIV/00216275:25310/17:39902740 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22320/17:43913293

Výsledek na webu

<a href="http://dx.doi.org/10.1007/s11144-017-1159-1" target="_blank" >http://dx.doi.org/10.1007/s11144-017-1159-1</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11144-017-1159-1" target="_blank" >10.1007/s11144-017-1159-1</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Partial oxidation of ethanol over ZrO2-supported vanadium catalysts

Popis výsledku v původním jazyce

Zirconia-supported vanadium catalysts were prepared by the wet impregnation of two different zirconia supports using ammonium metavanadate in aqueous hydrogen peroxide solution. The catalysts were characterized by N-2 physisorption, X-ray fluorescence analysis (XRF), X-ray diffraction (XRD) and Raman spectroscopy to determine their textural properties, chemical composition and the nature of vanadium species. The partial oxidation of ethanol to acetaldehyde was carried out in a fixed bed reactor at atmospheric pressure varying the weight-hourly space velocity and temperature in the range 1-4 h(-1) and 150-250 degrees C, respectively. In addition to acetaldehyde, a range of oxygenated and deoxygenated by-products was observed. Diethyl ether and ethyl acetate were detected in the reaction mixture with low and almost constant amount. These products are formed through a homogeneous reaction in the free volume of reactor or pre-heating zone irrespective of catalyst used. Vanadium species anchored on the zirconia surface are able to activate ethanol molecules already at 150 degrees C with the high selectivity to acetaldehyde. A comparison of vanadium speciation and catalytic results led to conclusion that oligomeric vanadium species and small oxide clusters have no deterioration effect on acetaldehyde selectivity.

Název v anglickém jazyce

Partial oxidation of ethanol over ZrO2-supported vanadium catalysts

Popis výsledku anglicky

Zirconia-supported vanadium catalysts were prepared by the wet impregnation of two different zirconia supports using ammonium metavanadate in aqueous hydrogen peroxide solution. The catalysts were characterized by N-2 physisorption, X-ray fluorescence analysis (XRF), X-ray diffraction (XRD) and Raman spectroscopy to determine their textural properties, chemical composition and the nature of vanadium species. The partial oxidation of ethanol to acetaldehyde was carried out in a fixed bed reactor at atmospheric pressure varying the weight-hourly space velocity and temperature in the range 1-4 h(-1) and 150-250 degrees C, respectively. In addition to acetaldehyde, a range of oxygenated and deoxygenated by-products was observed. Diethyl ether and ethyl acetate were detected in the reaction mixture with low and almost constant amount. These products are formed through a homogeneous reaction in the free volume of reactor or pre-heating zone irrespective of catalyst used. Vanadium species anchored on the zirconia surface are able to activate ethanol molecules already at 150 degrees C with the high selectivity to acetaldehyde. A comparison of vanadium speciation and catalytic results led to conclusion that oligomeric vanadium species and small oxide clusters have no deterioration effect on acetaldehyde selectivity.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

<a href="/cs/project/GA15-19780S" target="_blank" >GA15-19780S: Studium aktivních center nosičových vanadových katalyzátorů pro selektivní oxidaci etanolu</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Reaction Kinetics Mechanisms and Catalysis

ISSN

1878-5190

e-ISSN

—

Svazek periodika

121

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

13

Strana od-do

161-173

Kód UT WoS článku

000401935400012

EID výsledku v databázi Scopus

2-s2.0-85012911257