Тип публикации: статья из журнала

Год издания: 2023

Идентификатор DOI: 10.3390/catal13091298

Ключевые слова: cellulose, hydrolysis-dehydration, glucose, 5-hydroxymethylfurfural, niobium oxide, zirconium oxide, batch reactor, flow reactor

Аннотация: Niobium oxide supported on ZrO2 and mixed oxide of NbOx-ZrO2 was prepared and characterized. Mechanical treatment was followed by the microwave heating procedure of catalysts with more advanced textural parameters. The amount of Lewis (LAS) and Brønsted (BAS) acid sites rose with the increasing Nb content in the catalysts. The cataПоказать полностьюlytic properties of samples of niobia-zirconia (NbZr samples, NbZr catalysts) were studied in a cellulose hydrolysis–dehydration reaction at 453 K under an inert Ar atmosphere in a batch reactor. Glucose and 5-hydroxumethylfurfural (5-HMF) were the major products. The initial reaction rate could be tuned by the density of acid sites on the surface of solid. At a low density of acid sites (0.1–0.3 µmol·m−2), the initial reaction rate had a pronounced inverse correlation. Increasing the LAS/BAS from 0.3 to 2.5 slightly stimulated the formation of the target products. The catalytic properties of NbZr catalysts prepared by microwave treatment were studied in cellulose transformation in a flow set-up. Glucose was found to be the major product. The maximum yield of glucose was observed in the presence of the sample of 17%Nb/ZrO2. Increasing Nb content resulted in the formation of Nb-associated acid centers and, in turn, increasing catalyst acidity and activity.

Журнал: Catalysts

Выпуск журнала: Т. 13, № 9

Номера страниц: 1298

ISSN журнала: 20734344

Место издания: Базель

• Gromov Nikolay V. (Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences)
• Ogorodnikova Olga L. (Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences)
• Medvedeva Tatiana B. (Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences)
• Panchenko Valentina N. (Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences)
• Yakovleva Irina S. (Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences)
• Isupova Lyubov A. (Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences)
• Timofeeva Maria N. (Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences)
• Taran Oxana P. (Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences)
• Aymonier Cyril (University of Bordeaux)
• Parmon Valentin N. (Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences)

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