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0223U001372,
0121U111813
,
Design of modified Y-Mg-Si(Al) oxide catalysts for the production of important chemicals (1,3-butadiene, 1-butanol) from bioethanol
Larina Olha V., Кандидат хімічних наук
28-01-2023
L. V. Pisarzhevskii Institute Of Physical Chemistry of The National Academy of Sciences of Ukraine
It has been established that the acceleration of the key step of heterogeneous-catalytic processes of obtaining 1,3-butadiene and 1-butanol from ethanol, aldol condensation of acetaldehyde can be achieved by modifying oxide catalysts by compounds of rare earth elements. The introduction of a modifying additive Y (III) to the Mg-Al oxide catalyst at the stage of hydrotalcite synthesis and a decrease in maturation time of the mother liquor after the coprecipitation provides 24 % of the yield of 1-butanol in the process of ethanol gas-phase condensation. With the modification of Zn-MgSi oxide systems by alkali metals (Na, K), the selectivity of 1,3-butadiene (at >400°C) is achieved by reducing the formation of by-products. The alkali metals, as part of Zn-Zrsi oxide systems, cause a decrease in the selectivity to ethene and diethyl ether, due to a decrease in the content of strong acidic sites, which accelerate the side reaction of ethanol dehydration.
Valihura Karina V
Zikrata Oksana V
2023-01-28
Updated: 2025-12-12
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