Enhanced ethanol dehydrogenation over Ni-containing zirconia-alumina catalysts with microwave-assisted synthesis

Zhukova, A.; Chuklina, S.; Fionov, Y.; Vakhrushev, N.; Sazonova, A.; Mikhalenko, I.; Zhukov, D.; Isaikina, O.; Fionov, A.; Il’icheva, A.

Авторы: Zhukova Anna, Chuklina Sofia, Fionov Yurii, Vakhrushev Nikolai, Sazonova Alina, Mikhalenko Irina, Zhukov Dmitry, Isaikina Oksana, Fionov Alexander, Il’icheva Alla
Журнал: Research on Chemical Intermediates
Год издания: 2023
Издательство: V S P
Местоположение издательства: Netherlands
Первая страница: 1
Последняя страница: 24
DOI: 10.1007/s11164-023-05174-5
Аннотация: Bio-based acetaldehyde production by non-oxidative dehydrogenation of ethanolis a promising alternative for the fine chemistry industry, where acetaldehyde is animportant part of the synthesis chain and co-production of hydrogen. In this paper,investigations on nickel containing alumina itterbia stabilized zirconia with microwave-assisted synthesis as catalysts for the ethanol dehydrogenation process to acetaldehydeare reported. Ni–xAl2O3–(100 − x)[Zr0,97Yb0,03]O2 (x = 35 and 65 mol%)were prepared by using microwave (MW) irradiation and by traditional heating stepsduring sol–gel preparation. The textural properties, structure, morphology, surfaceand phase composition, and RedOx properties (SEM–EDX, BET N2-physisorption,TG–DTA, XRD, EPR) of the samples were compared with the effect of the microwave-assisted synthesis and the Zr:Al ratio on the ethanol dehydrogenation isreported. Two synthesis routes were compared, and it was found that microwavepretreatment of hydrogel during sol–gel synthesis favors catalytic dehydrogenation,whereas catalysts prepared by pretreatment under uniform heating perform muchworse. The microwave-assisted synthesis approach turned out to be more promisingin terms of selectivity to acetaldehyde in the ethanol dehydrogenation due to formnickel oxide particles with strong support interaction in noncubic coordination catalyzingthe ethanol dehydrogenation and at the same time to decrease the formationof nickel aluminate phase involved in competitive dehydration reaction to ethylene.Thus, the highest obtained selectivity to acetaldehyde was ≈ 70% at 400 °C on Ni–65AZ–MW sample.
Добавил в систему: Фионов Александр Викторович

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Enhanced ethanol dehydrogenation over Ni-containing zirconia-alumina catalysts with microwave-assisted synthesisстатья Исследовательская статья

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