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- Title
The effect of modification of Zn–Mg(Zr)Si oxide catalysts with rare-earth elements (Y, La, Ce) in the ethanol-to-1,3-butadiene process.
- Authors
Larina, Olga V.; Zikrata, Oksana V.; Alekseenko, Lidiya M.; Soloviev, Sergiy O.; Orlyk, Svitlana M.
- Abstract
This paper presents the results of an investigation of Zn–Mg(Zr)Si nanophase oxide systems modified with rare-earth elements (REE: yttrium, lanthanum, and cerium). The prepared systems are characterized by X-ray diffraction, low-temperature (77 K) nitrogen ad(de)sorption, Raman, UV–Vis diffuse reflectance and FTIR spectroscopy of adsorbed pyridine, and temperature-programmed desorption of NH3 and CO2. The effect of REE modification on the efficiency of the aqueous ethanol-to-1,3-butadiene process over Zn–Mg(Zr)Si oxide catalysts is shown. The rate of 1,3-butadiene formation rises up to four times as a result of the acceleration of the key step of the ethanol-to-1,3-butadiene process, the aldol condensation of acetaldehyde. The cause of this effect is a change in acid–base characteristics of Zn–Mg(Zr)Si oxide systems upon the introduction of REE additives in their composition. The change in acid–base characteristics of the modified Zn–MgSi oxide system is additionally caused by the formation of a nanolayered magnesium silicate hydrate phase.
- Subjects
CERIUM oxides; ALDOL condensation; FOURIER transform infrared spectroscopy; REFLECTANCE spectroscopy; CATALYSTS; MAGNESIUM silicates
- Publication
Applied Nanoscience, 2023, Vol 13, Issue 11, p7101
- ISSN
2190-5509
- Publication type
Article
- DOI
10.1007/s13204-023-02876-5