Liquid-phase oxidation of betulin over supported Ag NPs catalysts: Kinetic regularities, catalyst deactivation and reactivation; Molecular Catalysis; Vol. 528
| Parent link: | Molecular Catalysis Vol. 528.— 2022.— 112461, 32 p. |
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| مؤلفون آخرون: | , , , , , , , , |
| 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 |
| اللغة: | الإنجليزية |
| منشور في: |
2022
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| الموضوعات: | |
| 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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| 200 | 1 | |a Liquid-phase oxidation of betulin over supported Ag NPs catalysts: Kinetic regularities, catalyst deactivation and reactivation |f A. R. Grigorjeva (Grigoreva), E. N. Kolobova, E. G. Pakrieva [et al.] | |
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| 330 | |a 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 | ||
| 336 | |a Текстовый файл | ||
| 461 | 1 | |t Molecular Catalysis | |
| 463 | 1 | |t Vol. 528 |v 112461, 32 p. |d 2022 | |
| 610 | 1 | |a электронный ресурс | |
| 610 | 1 | |a труды учёных ТПУ | |
| 610 | 1 | |a silver catalyst | |
| 610 | 1 | |a betulin oxidation | |
| 610 | 1 | |a kinetics | |
| 610 | 1 | |a deactivation | |
| 610 | 1 | |a reactivation | |
| 610 | 1 | |a катализаторы | |
| 610 | 1 | |a окисление | |
| 610 | 1 | |a бетулин | |
| 610 | 1 | |a кинетика | |
| 610 | 1 | |a деактивация | |
| 610 | 1 | |a реактивация | |
| 701 | 1 | |a Grigorjeva (Grigoreva) |b A. R. |c medical technology specialist |c engineer of Tomsk Polytechnic University |f 1995- |g Anna Romanovna |3 (RuTPU)RU\TPU\pers\46789 |9 22425 | |
| 701 | 1 | |a Kolobova |b E. N. |c Chemical Engineer |c design engineer of Tomsk Polytechnic University |f 1989- |g Ekaterina Nikolaevna |3 (RuTPU)RU\TPU\pers\34488 |9 17871 | |
| 701 | 1 | |a Pakrieva |b E. G. |c Chemical Engineer |c Engineer of Tomsk Polytechnic University |f 1989- |g Ekaterina Germanovna |3 (RuTPU)RU\TPU\pers\33273 |9 17018 | |
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