Liquid-phase oxidation of betulin over supported Ag NPs catalysts: Kinetic regularities, catalyst deactivation and reactivation

Liquid-phase oxidation of betulin over supported Ag NPs catalysts: Kinetic regularities, catalyst deactivation and reactivation

التفاصيل البيبلوغرافية
Parent link:Molecular Catalysis
Vol. 528.— 2022.— 112461, 32 p.
مؤلفون آخرون: Grigorjeva (Grigoreva) A. R. Anna Romanovna, Kolobova E. N. Ekaterina Nikolaevna, Pakrieva E. G. Ekaterina Germanovna, Maki-Arvela P., Kuznetsova S. N. Svetlana Nikolaevna, Carabineiro S. A. K. Sonia Alexandra Correia, Bogdanchikova N. Nina, Pestryakov A. N. Aleksey Nikolaevich, Murzin D. Yu. Dmitry Yurjevich
الملخص:Title screen
Betulin, being a pentacyclic triterpene alcohol and an extractive from birch bark, along with its oxo-derivatives, has a broad range of physiological properties of interest for synthesis of pharmaceuticals. Instead of oxidizing betulin with strong and toxic oxidizing agents the present study shows a possibility of using liquid-phase oxidation of betulin with air over supported Ag NPs catalysts as an alternative method for synthesis of its oxo-derivatives. Based on catalytic studies, high resolution transmission electron microscopy, X-ray photoelectron spectroscopy and ultraviolet-visible diffuse reflectance spectroscopy, the evolution of the surface of nanosilver catalysts during the catalysis was demonstrated, as well as under the impact of reactant gas composition. The kinetic regularities and causes of deactivation of supported Ag NPs catalysts were revealed. An approach to the regeneration of silver catalysts was proposed. Kinetic analysis with numerical data fitting was performed resulting in an adequate description of the concentration dependencie
Текстовый файл
منشور في: 2022
الموضوعات:
электронный ресурс
труды учёных ТПУ
silver catalyst
betulin oxidation
kinetics
deactivation
reactivation
катализаторы
окисление
бетулин
кинетика
деактивация
реактивация
الوصول للمادة أونلاين:https://doi.org/10.1016/j.mcat.2022.112461
التنسيق: الكتروني فصل الكتاب
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=668222

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