使用聚胺和均催化剂将二氧化碳从空气转化为甲醇
Jotheeswari Kothandaraman1, Alain Goeppert1, Miklos Czaun1
1Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California , University Park, Los Angeles, California 90089-1661, United States.
Journal of the American Chemical Society
|December 30, 2015
概括
一个新的同质催化剂有效地将二氧化碳 (CO2) 转化为甲醇 (CH3OH),即使二氧化碳直接从空气中捕获. 这种强大的系统可轻松分离产品和回收催化剂.
科学领域:
- 催化剂
- 绿色化学
- 可再生能源
背景情况:
- 在缓解气候变化和发展可持续化学过程方面,二氧化碳 (CO2) 的利用仍然是一个重大挑战.
- 有效地将二氧化碳转化为甲醇 (CH3OH) 等有价值的化学物质需要创新的催化系统.
- 同质催化剂具有很高的活性和选择性,但在催化剂分离和回收方面经常面临挑战.
研究的目的:
- 从二氧化碳制造甲醇的高效同质催化剂系统的开发.
- 证明使用空气作为二氧化碳合成的直接来源的可行性.
- 评估开发的催化系统的强度和可回收性.
主要方法:
- 使用包括五乙烯胺和Ru-Macho-BH (1) 的同质催化剂系统.
- 反应是在125-165°C的温度下进行的.
- 通过简单的蒸实现了甲醇分离,并在多次运行中测试了催化剂的可回收性.
主要成果:
- 在145°C时实现了70h-1的初始旋转频率.
- 催化系统表现出强性,经过五次回收运行后的营业额超过2000次,但没有显著的活动损失.
- 首次从环境空气中直接捕获的二氧化碳 (400 ppm) 被转化为CH3OH,产量为79%.
结论:
- 已成功开发出一种高效且强大的同质催化剂系统,用于二氧化碳转化为CH3OH.
- 该系统能够直接从空气中利用二氧化碳,这代表了碳捕获和利用 (CCU) 技术的重大进步.
- 甲醇分离的容易性和催化剂的可回收性凸显了这种方法在可持续化学合成中的实际潜力.
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