First triple-functional polyoxometalate Cs10.6[H2.4GeNb13O41] for highly selective production of methyl levulinate directly from cellulose
| العنوان: | First triple-functional polyoxometalate Cs10.6[H2.4GeNb13O41] for highly selective production of methyl levulinate directly from cellulose |
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| المؤلفون: | Xueyan Zhang, Zijiang Jiang, Shengtian Wang, Yiming Li, Xiaohong Wang, Huaizhong Zhang, Mbage Bawa |
| المصدر: | Cellulose. 25:6405-6419 |
| بيانات النشر: | Springer Science and Business Media LLC, 2018. |
| سنة النشر: | 2018 |
| مصطلحات موضوعية: | Polymers and Plastics, 010405 organic chemistry, Fructoside, Reaction intermediate, 010402 general chemistry, 01 natural sciences, 0104 chemical sciences, Catalysis, chemistry.chemical_compound, chemistry, Cascade reaction, Organic chemistry, Methanol, Lewis acids and bases, Cellulose, Brønsted–Lowry acid–base theory |
| الوصف: | The first triple-functional polyoxometalate Cs10.6[H2.4GeNb13O41] (CsGeNb) was evaluated for its catalytic activity in production of methyl levulinate (ML) from biomass substrates in methanol. Higher conversion of cellulose (86.0%) and higher yield of ML (53.0%) were obtained under optimized reaction conditions of 0.1 g of cellulose, 0.04 mmol of catalyst, and 6 mL of methanol at 165 °C for 10 h, due to its mixed Bronsted acid sites, Lewis acid sites, and base sites, being measured for the first time. Reaction intermediates in methanolysis of fructose, glucose, and cellulose provided some insight into the reaction pathways, while methyl glucoside and methyl fructoside (MF) were key intermediates generated by Bronsted acid and Lewis acid or base sites. Assisted by microwave irradiation, the efficiency could be improved to 55.4% yield of ML within 3 h. Meanwhile, CsGeNb acted as a heterogeneous catalyst through six recycles without loss of activity. |
| تدمد: | 1572-882X 0969-0239 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::e9f006e2d7c7a7f9d4dd3e40126f69da https://doi.org/10.1007/s10570-018-2037-3 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........e9f006e2d7c7a7f9d4dd3e40126f69da |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 1572882X 09690239 |
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