直接将CO2转化为酒精,使用基于的酸催化剂
Dimitra Iltsiou1, Jerrik Mielby1, Søren Kegnaes1
1Department of Chemistry, Technical University of Denmark, Kemitorvet 207, 2800 Kgs., Lyngby, Denmark.
ChemPlusChem
|October 30, 2023
概括
焦石上的铜纳米颗粒有效地将二氧化碳 (CO2) 转化为乙醇和异醇等酒精. 引入介质孔和封装纳米颗粒可以提高这种具有挑战性的反应的催化性能.
科学领域:
- 催化剂是一种催化剂.
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 直接将二氧化碳 (CO2) 化成酒精是可持续化学的一个关键目标.
- 采石支持的铜 (Cu) 纳米粒子为这种转变提供了潜力,但在活动和选择性方面面临挑战.
- 控制热带石结构,特别是引入介质度,对于优化催化过程至关重要.
研究的目的:
- 为了研究支持MFI和BEA热利特的Cu纳米颗粒对二氧化碳化成酒精的有效性.
- 探讨引入美索波和封装Cu纳米颗粒对催化性能的影响.
- 通过量身定制的酸盐催化剂设计,增强二氧化碳转化和酒精选择性.
主要方法:
- 合成和表征Cu-支持的MFI和BEA热石,包括半孔变体.
- 使用N2物理吸收,XRD,SEM,TEM,NH3TPD,XPS和XRF进行催化剂表征.
- 在高压自闭槽中测试催化剂,以在不同H2部分压力下对CO2化.
主要成果:
- 与非半孔氧化物催化剂相比,半孔氧化物催化剂表现出较高的二氧化碳转化率和乙醇选择性.
- 再结晶的催化剂与封装的Cu纳米颗粒显示对异醇的选择性增加.
- Cu@m-S1在经过测试的再结晶的半孔化物中显示出最高的异醇生产率 (20.51 mmol g-1 h-1).
结论:
- 在提高二氧化碳化为酒精的化氧化催化剂性能方面,弥索起着至关重要的作用.
- 纳米粒子封装影响产品选择性,有利于异醇.
- 量身定制的热岩结构为开发高效的催化剂提供了一个有前途的策略,用于二氧化碳的利用.
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