Catalytic performance of micro-mesoporous zirconosilicates prepared by non-hydrolytic sol-gel in ethanol-acetaldehyde conversion to butadiene and related reactions

0567989 - ÚFCH JH 2024 RIV NL eng J - Journal Article
Hradský, D. - Machač, P. - Škoda, D. - Leonova, L. - Sazama, Petr - Pastvová, Jana - Kaucký, Dalibor - Všianský, D. - Moravec, Z. - Stýskalík, A.
Catalytic performance of micro-mesoporous zirconosilicates prepared by non-hydrolytic sol-gel in ethanol-acetaldehyde conversion to butadiene and related reactions.
Applied Catalysis A - General. Roč. 652, FEB 2023 (2023), č. článku 119037. ISSN 0926-860X. E-ISSN 1873-3875
R&D Projects: GA MŠMT(CZ) LM2018124; GA MŠMT(CZ) EF16_013/0001821
Grant - others:GA MŠk(CZ) CZ.02.1.01/0.0/0.0/16_013/0001821
Institutional support: RVO:61388955
Keywords : Aldol condensation * Ethanol to butadiene transformation * Micro-mesoporous * MPV reaction * Non-hydrolytic sol-gel * Zirconosilicate
OECD category: Physical chemistry
Impact factor: 5.5, year: 2022
Method of publishing: Limited access

The open porosity and number of Lewis acid sites in metal silicates (M = Zr, Ta) have been reported as key factors enabling reaching high butadiene (BD) productivity from ethanol. However, some microporous zeolites recently displayed very high BD yields. To gain a deeper insight, we have applied non-hydrolytic sol-gel (NHSG) in the preparation of micro-mesoporous zirconosilicates. The porosity, structure, and acidity of these materials have been described and compared to a benchmark sample prepared by dry impregnation. The detailed characterization proved that NHSG preparation provided highly homogeneous Zr dispersion in silica leading to almost doubled Lewis acid site numbers and higher activity in ethanol-acetaldehyde conversion to BD, Meerwein-Ponndorf-Verley (MPV) reaction, and aldol condensation, in comparison to the catalyst prepared by dry impregnation. The selectivity and stability were similar for catalysts prepared by NHSG and dry impregnation.
Permanent Link: https://hdl.handle.net/11104/0339308