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Transition metals promoting Mg-Al mixed oxides for conversion of ethanol to butanol and other valuable products: Reaction pathways
Authors: Mück Jáchym | Kocík Jaroslav | Hájek Martin | Tišler Zdeněk | Frolich Karel | Kašpárek Aleš
Year: 2021
Type of publication: článek v odborném periodiku
Name of source: Applied catalysis A: General
Page from-to: "118380-1"-"118380-8"
Titles:
Language Name Abstract Keywords
cze Přechodové kovy jako příměsi Mg-Al směsných oxidů pro konverzi etanolu na butanol a další využitelné produkty: Reakční cesta Článek je zaměřen na katalytickou syntézu butanolu z etanolu v mikroprůtokovém reaktoru při konstantním výhovém průtoku a odlišných reakčních teplotách. Reakce byla katalyzována směsnými oxidy Mg-Al s příměsí přechodových kovů jako jsou Co, Ni, Cu, Mn a Cr. Byla testována kompletní reakční cesta. butanol;katalýza;Guerbetova reakce;hydrotalcity;směsné oxidy
eng Transition metals promoting Mg-Al mixed oxides for conversion of ethanol to butanol and other valuable products: Reaction pathways This paper is focused on the catalytic synthesis of butanol from ethanol in a microflow reactor at a constant weight hour space velocity (4.5 h−1) and different reaction temperatures (280, 300 and 350 °C). The reaction was catalysed by Mg-Al mixed oxides (i) pure and (ii) with added transition metals such as Co, Ni, Cu, Mn and Cr (synthesis by coprecipitation). The solid materials were deeply characterised. Other products, such as ethylene, 1,1-diethoxyethane, ethyl acetate, 1-hexanol, etc. were also determined and the reaction pathway for their formation was examined. The metals Cr and Mn did not increase the catalyst activity, which was quite low (maximum 19% at 350 °C). However, the metals Co and Ni positively influenced butanol formation, while Cu positively influenced ethyl acetate formation. Moreover, ethanol conversion increased with increasing temperature, but at the same time the selectivity to butanol decreased. Butanol;Catalysis;Guerbet reaction;Hydrotalcites;Mixed oxides

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