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The role of ZnO in the catalytic behaviour of Zn-Al mixed oxides in aldol condensation of furfural with acetone
Authors: Dubnová Lada | Smoláková Lucie | Kikhtyanin Oleg | Kocik Jaroslav | Kubicka David | Zvolská Magdalena | Pouzar Miloslav | Čapek Libor
Year: 2021
Type of publication: článek v odborném periodiku
Name of source: Catalysis Today
Publisher name: Elsevier Science BV
Place: Amsterdam
Page from-to: 181-191
Titles:
Language Name Abstract Keywords
cze Role ZnO v katalytickém chování Zn-Al směsných oxidů při aldolové kondenzaci furfuralu s acetonem Práce popisuje klíčové aspekty Zn-Al směsných oxidů připravených různými metodami a vykazujících vysokou konverzi a selektivitu v aldolové kondenzaci furfuralu s acetonem. Struktura, složení a acidobazické vlastnosti Zn-Al směsných oxidů jsou stanoveny pomocí TGA, XRD. N2 adsorpce, TPD a in-situ reflektanční spektroskopie. aldolová kondenzace; Zn-Al směsné oxidy; in situ DRS; ZnO částice; aktivní centra
eng The role of ZnO in the catalytic behaviour of Zn-Al mixed oxides in aldol condensation of furfural with acetone The manuscript describes the key aspects of Zn-Al mixed oxides prepared by different methods (the so-called urea method and co-precipitation methods using either NaOH/Na2CO3 alkaline solution or solution of NaOH) affording high conversion and selectivity values in aldol condensation of furfural with acetone. The structure, composition and acid-base properties of Zn-Al mixed oxides were described by using of TGA, XRD, N-2-adsorption, TPD-NH3/CO2 and in-situ diffuse reflectance spectroscopy and correlated with the catalytic performance of a series of Zn-Al mixed-oxides catalysts. Along with the impact of specific surface area and basicity on the furfural conversion, the conversion of furfural also increased with the increasing value of the edge of UV-vis spectrum of Zn-Al mixed oxide reflecting ZnO-Al2O3 interaction. We have introduced a simple method based on diffuse reflectance spectroscopy with a potential to predict furfural conversion over Zn-Al mixed oxides in aldol condensation of furfural with acetone. aldol condensation; Zn-Al mixed oxides; in-situ DRS; ZnO particles; active sites

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