Effects of the support on bifunctional one-step synthesis of methylal via methanol oxidation catalysed by Fe–Mo-based bifunctional catalysts
| Autor: | Yingyun Qiao, Zhang Zhimei, Xiangyu Sun, Ruiyuan Tang, Yuanyu Tian, Meng Yuan |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
Double bond Renewable Energy Sustainability and the Environment Energy Engineering and Power Technology Activation energy Medicinal chemistry Catalysis chemistry.chemical_compound Fuel Technology chemistry Octahedron Yield (chemistry) Methanol Bifunctional Selectivity |
| Zdroj: | Sustainable Energy & Fuels. 5:246-260 |
| ISSN: | 2398-4902 |
| DOI: | 10.1039/d0se01194k |
| Popis: | In the one-step preparation of methylal from methanol, achieving high methanol conversion and high methylal yield is a huge challenge. To address this problem, in this study a new Fe–Mo-based catalyst was designed, and the effect of the type and amount of the support on catalytic activity was explored. The results showed that Mo:Fe(2)/HZSM-5(80 + 80), in which HZSM-5(80 + 80) was the catalytic support, had excellent catalytic performance, with the yield of methylal reaching 81.33%, much higher than other reported results of this process. Through XPS, NH3-TPD and PY-FTIR analyses it was found that the formation of Mo5+ promoted coordination of the two terminal oxygens with the Mo double bond in the Fe2(MoO4)3 octahedron, and the higher the B/L acid site ratio, the better the catalytic activity and the higher the selectivity of the target product. The apparent activation energy also further proved that Mo:Fe(2)/HZSM-5(80 + 80) was highly suitable for the one-step production of methylal from methanol. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|