Mechanochemical synthesis of CuO/MgAl2O4 and MgFe2O4 spinels for vanillin production from isoeugenol and vanillyl alcohol

CuO/MgAl2O4 and CuO/MgFe2O4 catalysts were successfully synthesized with the use of spinel supports by a very simple and low-cost mechanochemical method. High-speed ball-milling was used to synthesize these catalyst supports for the first time. Materials were subsequently characterized by using XRD, FESEM, TEM, EDS-Dot mapping, XPS, BET-BJH, and Magnetic Susceptibility to investigate the physical-chemical characteristics of the catalysts. Acidity evaluation results indicated that the catalyst with the Mg-Al spinel support had more acid sites. XRD results showed a successful synthesis of the catalysts with large crystal sizes. Both catalysts were used in isoeugenol oxidation and vanillyl alcohol to vanillin reactions, with the CuO/MgAl2O4 showing optimum results. This catalyst provided 67% conversion (74% selectivity) after 2 h and this value improved to 81% (selectivity 100%) with the second reaction after 8 h. The CuO/MgFe2O4 catalyst in the first reaction after five hours revealed 53% conversion (47% selectivity) and after eight hours with the second reaction, the conversion value improved to 64% (100% selectivity). In terms of reusability, CuO/MgAl2O4 showed better results than the CuO/MgFe2O4 catalyst, for both reactions. © 2019 by the authors.

Авторы
Rahmanivahid B.1, 2 , De Dios M.P. , Haghighi M.3 , Luque R. 2, 4
Журнал
Издательство
MDPI AG
Номер выпуска
14
Язык
Английский
Статус
Опубликовано
Номер
2597
Том
24
Год
2019
Организации
  • 1 Esfarayen University of Technology, Esfarayen, 96619-98195, Iran
  • 2 Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Córdoba, Campus de Rabanales, Edificio Marie Curie (C-3), Ctra Nnal IV-A, Km 396, Córdoba, E14014, Spain
  • 3 Chemical Engineering Faculty, Sahand University of Technology, P.O. Box 51335-1996, Sahand New Town, Tabriz, 53318-11111, Iran
  • 4 Peoples Friendship University of Russia (RUDN University), 6 Miklukho Maklaya str., Moscow, 117198, Russian Federation
Ключевые слова
High speed ball-milling; Isoeugenol; Mechanochemistry; Spinel; Vanillin; Vanillyl alcohol
Дата создания
24.12.2019
Дата изменения
24.12.2019
Постоянная ссылка
https://repository.rudn.ru/ru/records/article/record/55148/
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