Aerobic Selective Oxidation of Glucose to Gluconate Catalyzed by Au/Al2O3 and Au/C: Impact of the Mass-Transfer Processes on the Overall Kinetics | Sciact - CRIS-система Института катализа

Aerobic Selective Oxidation of Glucose to Gluconate Catalyzed by Au/Al2O3 and Au/C: Impact of the Mass-Transfer Processes on the Overall Kinetics Научная публикация

Журнал

Chemical Engineering Journal
ISSN: 1385-8947 , E-ISSN: 1873-3212

Вых. Данные

Год: 2013, Том: 223, Страницы: 921-931 Страниц : 11 DOI: 10.1016/j.cej.2012.11.073

Ключевые слова

Alumina, Carbon, Gluconic acid, Glucose, Gold catalyst, Mass transfer, Selective oxidation

Авторы

Delidovich Irina V. ¹ , Moroz Boris L. ^1,2 , Taran Oxana P. ^1,3 , Gromov Nikolay V. ^1,2 , Pyrjaev Pavel A. ¹ , Prosvirin Igor P. ¹ , Bukhtiyarov Valerii I. ^1,2 , Parmon Valentin N. ^1,2

Организации

1	Boreskov Institute of Catalysis SB RAS, Lavrentieva Prosp., 5, Novosibirsk 630090, Russia
2	Novosibirsk State University, Pirogova St., 2, Novosibirsk 630090, Russia
3	Novosibirsk State Technical University, K. Marx Prosp., 20, Novosibirsk 630092, Russia

Информация о финансировании (4)

1	Российский фонд фундаментальных исследований	09-03-12272
2	Российский фонд фундаментальных исследований	11-03-01022
3	Министерство образования и науки Российской Федерации
4	Совет по грантам Президента Российской Федерации	НШ-524.2012.3

Aerobic oxidation of glucose in the presence of Au/Al2O3 catalysts with different dispersion of supported gold and Au/C catalysts containing highly dispersed gold nanoparticles was studied at varied glucose:Au molar ratios. The studies were focused on determining the contribution of the mass-transfer processes to the overall reaction kinetics in different regimes. The Au/Al2O3 catalysts were more active than the Au/C catalysts at high glucose:Au molar ratios. Among the alumina-supported catalysts with different metal dispersion, the highest TOF at high glucose:Au molar ratios was characteristic of the Au/Al2O3 catalysts bearing metal particles of 1–5 nm in size. Under these conditions, the high effectiveness factor of the Au/Al2O3 catalysts (>95%) was observed at a uniform gold distribution through the support granules. For the Au/C catalysts with the non-uniform distribution of gold nanoparticles through the catalyst grains, the apparent reaction rate was affected by internal diffusion (the effectiveness factor of a catalyst grain is ca. 70%), while the interface gas–liquid–solid oxygen transfer influenced the overall reaction kinetics as well. At a low glucose:Au molar ratio the reaction rate was limited by oxygen dissolution in the aqueous phase. In this mass transfer regime the rate of glucose oxidation over the carbon-supported catalysts exceeds the reaction rate over the alumina-supported catalyst, which is attributed to a higher adhesion of the hydrophobic carbon support to the gas–liquid interface facilitating the oxygen mass transfer towards catalytic sites.

Delidovich I.V. , Moroz B.L. , Taran O.P. , Gromov N.V. , Pyrjaev P.A. , Prosvirin I.P. , Bukhtiyarov V.I. , Parmon V.N.
Aerobic Selective Oxidation of Glucose to Gluconate Catalyzed by Au/Al2O3 and Au/C: Impact of the Mass-Transfer Processes on the Overall Kinetics
Chemical Engineering Journal. 2013. V.223. P.921-931. DOI: 10.1016/j.cej.2012.11.073 WOS Scopus РИНЦ CAPlusCA OpenAlex

Поступила в редакцию:	4 сент. 2012 г.
Принята к публикации:	16 нояб. 2012 г.
Опубликована online:	26 нояб. 2012 г.
Опубликована в печати:	1 мая 2013 г.

Web of science:	WOS:000320631200105
Scopus:	2-s2.0-84877661177
РИНЦ:	20428007
Chemical Abstracts:	2013:18682
Chemical Abstracts (print):	158:605881
OpenAlex:	W2034386938

БД	Цитирований
Web of science	65
Scopus	72
РИНЦ	74
OpenAlex	72