| Autor: |
Zhentao Zhao, Yuxin Wang, Jian Shi, Guangwen Xu, Lei Shi |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
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| Zdroj: |
Fuel Processing Technology, Vol 261, Iss , Pp 108107- (2024) |
| Druh dokumentu: |
article |
| ISSN: |
0378-3820 |
| DOI: |
10.1016/j.fuproc.2024.108107 |
| Popis: |
One-step transesterification between ethylene carbonate (EC) and ethanol (EtOH) can effectively prevent the formation of azeotropes in the synthesis of diethyl carbonate (DEC) / ethyl methyl carbonate (EMC). However, owing to the influence of volume and electronic effects of EtOH molecules, the catalytic activity is insufficient. In this study, we propose an on-line synthesis technique for catalysts and prepare a unique heterogeneous alkali catalyst, PS-(NR3OH)EG. This technique simplifies the catalyst preparation process and protects it from exposure to water and carbon dioxide in the air. The active sites of PS-(NR3OH)EG are derived from the product ethylene glycol (EG). PS-(NR3OH)EG exhibits excellent catalytic performance in promoting EC and EtOH transesterification. The physicochemical properties of PS-(NR3OH)EG are analysed, and the reaction conditions are optimized. The results indicate that PS-(NR3OH)EG has superior catalytic activity and stability compared to the similar previously reported catalysts. Notably, after continuous reaction in a fixed-bed reactor for 500 h, PS-(NR3OH)EG maintain its initial catalytic activity. This study provides theoretical and experimental guidance for catalyst preparation and transesterification reaction process design. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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