使用支持的基催化剂将HMF直接降解氨基化为5-氨基-2-甲醇
Doris Ruiz1, Karen Morales1, Päivi Mäki-Arvela2
1Physical Chemistry Department, Faculty of Chemical Sciences, University of Concepcion, Casilla 160-C, Concepción, Chile.
ChemPlusChem
|August 13, 2024
概括
催化剂通过还原性氨基化有效地将5-基甲基 (HMF) 转化为5-氨基甲基) -2-甲醇 (AMFM). 碳支持的表现出卓越的性能,在温和条件下实现高转换率,产量和选择性.
科学领域:
- 催化剂是一种催化剂.
- 绿色化学 绿色化学
- 材料科学 材料科学 材料科学
背景情况:
- 5-基甲基 (HMF) 是一种主要的生物质衍生平台化学物质.
- 将HMF转化为有价值的产品对可持续化学至关重要.
- 降解性氨化为功能化衍生物提供了一条途径.
研究的目的:
- 为了研究使用氨的HMF的部分还原性氨化.
- 评估在各种材料 (γ-Al2O3,TiO2,SiO2和碳) 上支的催化剂的性能.
- 了解支架类型和反应压力对HMF转化为5-氨基甲基-2-甲醇 (AMFM) 的影响.
主要方法:
- 使用TEM,SEM-EDS,N2吸附,TGA,CO-化学吸附,TPR,XRD,NH3-TPD,ICP-AES和XPS等技术合成和描述催化剂.
- 在不同压力下,HMF与气态氨的部分还原性氨化.
- 基于转换,产量和选择性的催化剂性能评估.
主要成果:
- 所有测试的催化剂都表现出高活性和反应速率.
- 碳 (Ir/C) 支持的催化剂在50分钟内实现了93%的HMF转化,具有99%的选择性和92%的AMFM产量.
- 催化剂表面的负荷和酸度被确定为影响活性和选择性的关键因素.
- 在三个反应周期后,Ir/C催化剂保持了对AMFM的显著选择性 (63%) 和产量 (59%).
结论:
- 催化剂,特别是当支持碳时,在温和条件下对HMF到AMFM的价值化非常有效.
- /气催化剂表现出极好的稳定性和可重复使用性.
- 这项研究突出了从生物质衍生的HMF生产有价值化学品的有希望的途径.
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