在CH3中影响产品分布的CO联合合在ZSM-5上的Cl合 石:压力扭曲了图表
Zihao Zhang1, Matteo Vanni2, Xiangkun Wu1
1Paul Scherrer Institute, 5232, Villigen, Switzerland.
Angewandte Chemie (International ed. in English)
|March 7, 2024
概括
一氧化碳 (CO) 在甲基化物转化为碳化合物 (MCTH) 的过程中对化物起着关键作用. 添加二氧化碳可通过形成烯中间体来增加烯的产量,尤其是在低压下.
科学领域:
- 催化剂是一种催化剂.
- 化学工程是化学工程的重要组成部分.
- 表面科学是一门学科.
背景情况:
- 对于可持续的化学生产来说,C1合反应对氧化物催化剂至关重要.
- 一氧化碳 (CO) 在形成中的确切作用及其对甲基化物转化为碳化合物 (MCTH) 的反应性的影响仍然不清楚.
研究的目的:
- 通过操作式光电子光离子巧合光谱学 (PEPICO) 调查CO在MCTH反应中的作用.
- 阐明基中间体的形成及其对碳化合物产品分布及其化物催化剂性能的影响.
主要方法:
- 运行光电子光离子巧合光谱学 (PEPICO) 用于研究MCTH反应机制.
- 使用不同的CO压力来探测其对反应通路和产品选择性的影响.
主要成果:
- 发现CO可诱导MCTH中的基形成,显著提高烯酸的产量,特别是在低压下.
- 观察到产品的分布是压力依赖的,直接与CO诱导的基因形成及其从热带石表面的脱落有关.
- 与甲基化物同时食甲醇 (CH3OH) 证明了在环境压力下增强MCTH的催化剂稳定性的潜力.
结论:
- 碳化合物是MCTH中的关键物种,通过基形成促进C1合,并增强烯酸产量.
- 低压条件有利于CO诱导的基因形成和脱落,影响产品的选择性.
- 联合养策略,包括甲醇,为改善MCTH过程中的催化剂稳定性提供了一个有希望的途径.
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