H2-促进了二甲基乙烯碳化与长期稳定性和高活性的良性焦炭战略
Dong Fan1, Nan Chen1,2, Songyue Han1,2
1National Engineering Research Center of Lower-Carbon Catalysis Technology, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
ACS applied materials & interfaces
|April 4, 2024
概括
使用和铜物种的新策略增强了从二甲基以太中生产甲基酸盐的热催化剂. 这种方法提高了催化剂的稳定性和活性,显示了工业应用的巨大潜力.
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:
- 焦油酸催化二甲基乙烯 (DME) 碳化是甲基酸盐 (MeOAc) 的关键途径.
- 墨登石 (MOR) 热石具有较高的MeOAc选择性,但由于焦炭沉积,其稳定性有限.
- 开发稳定和活跃的MOR催化剂对于工业可行性至关重要.
研究的目的:
- 开发新的,高度稳定和活跃的MOR基催化剂用于DME碳化.
- 研究合和金属物种在调节焦炭形成和催化剂性能方面的作用.
- 了解良性焦炭改善催化稳定性和活性的机制.
主要方法:
- 利用促进的良性焦炭策略来修改摩登石 (MOR) 催化剂.
- 将具有化能力的金属物种 (例如,Cu,Zn) 纳入MOR结构.
- 研究了H2料对DME碳化过程中的焦炭沉积和消除的影响.
- 在甲基酸产量和长期稳定性方面评估了催化剂性能.
主要成果:
- 通过使用H2促进良性焦炭战略,成功开发出稳定和活跃的MOR基催化剂.
- 证明H2联合料和具有化能力的金属物种可以调节焦炭沉积,防止酸位堵塞.
- 通过H2和Cu消除超大焦炭物种,确保有效的质量转移和持续的催化活性.
- 在介的CuZn-HMOR上,在520小时以上的时间内获得了高的MeOAc产量 (0.4-0.5g·gcat−1·h−1),增强了50倍以上.
结论:
- 促进H2良性焦炭的策略显著提高了MOR催化剂的稳定性和活性DME碳化.
- 这种方法有效地减轻了不良副作用,并确保了催化剂的寿命.
- 开发的催化剂在甲基酸盐生产中显示出有前途的工业应用潜力.
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