Surfactant templated synthesis of porous VOx-ZrO2 catalysts for ethanol conversion to acetaldehyde

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F18%3A39912572" target="_blank" >RIV/00216275:25310/18:39912572 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.cattod.2017.08.034" target="_blank" >http://dx.doi.org/10.1016/j.cattod.2017.08.034</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.cattod.2017.08.034" target="_blank" >10.1016/j.cattod.2017.08.034</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Surfactant templated synthesis of porous VOx-ZrO2 catalysts for ethanol conversion to acetaldehyde

Popis výsledku v původním jazyce

Synthesis of VOx-ZrO2 catalysts with hierarchical porosity is reported here for first time. Surface areas of prepared materials reached values up to 211 m(2)/g with the intrinsic porosity on the border between micro-and mesopores. Physico-chemical properties and catalytic activity in ethanol oxidative dehydrogenation to acetaldehyde of these materials are compared with VOx/ZrO2 catalyst obtained by vanadia deposition on the surface of the already synthesized zirconia support with the hierarchical micro-meso-macroporosity with macrochannels of 200-500 nm in size. The VOx-ZrO2 sample prepared by deposition of vanadium on hierarchical zirconia exhibits high catalytic activity (TOF = 106.9 h(-1) at 200 degrees C), and especially high selectivity towards acetaldehyde. Acetaldehyde selectivity under reaction conditions varied between 99 and 92%. Directly synthesized VOx-ZrO2 catalysts showed higher selectivity to acetaldehyde compared to VOx-ZrO2 catalyst obtained by vanadia deposition on the surface of the already synthesized zirconia, but significantly lower activity probably due to incorporation of vanadium during the synthesis inside the channel walls where vanadium is not accessible to the gas molecules.

Název v anglickém jazyce

Surfactant templated synthesis of porous VOx-ZrO2 catalysts for ethanol conversion to acetaldehyde

Popis výsledku anglicky

Synthesis of VOx-ZrO2 catalysts with hierarchical porosity is reported here for first time. Surface areas of prepared materials reached values up to 211 m(2)/g with the intrinsic porosity on the border between micro-and mesopores. Physico-chemical properties and catalytic activity in ethanol oxidative dehydrogenation to acetaldehyde of these materials are compared with VOx/ZrO2 catalyst obtained by vanadia deposition on the surface of the already synthesized zirconia support with the hierarchical micro-meso-macroporosity with macrochannels of 200-500 nm in size. The VOx-ZrO2 sample prepared by deposition of vanadium on hierarchical zirconia exhibits high catalytic activity (TOF = 106.9 h(-1) at 200 degrees C), and especially high selectivity towards acetaldehyde. Acetaldehyde selectivity under reaction conditions varied between 99 and 92%. Directly synthesized VOx-ZrO2 catalysts showed higher selectivity to acetaldehyde compared to VOx-ZrO2 catalyst obtained by vanadia deposition on the surface of the already synthesized zirconia, but significantly lower activity probably due to incorporation of vanadium during the synthesis inside the channel walls where vanadium is not accessible to the gas molecules.

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

2018

Kód důvěrnosti údajů

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

Název periodika

Catalysis Today

ISSN

0920-5861

e-ISSN

—

Svazek periodika

304

Číslo periodika v rámci svazku

April

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

64-71

Kód UT WoS článku

000425179000009

EID výsledku v databázi Scopus

2-s2.0-85028333083