通过调节FER热酸框架中的酸位分布来增强二甲基乙烯碳化激活
Yanxia Guo1,2, Sen Wang1, Rui Geng1,2
1State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, Shanxi 030001, China.
iScience
|September 13, 2023
概括
这项研究增强了二甲基乙烯 (DME) 碳化为乙醇合成使用FER热酸盐纳米片. 通过优化酸位的位置,提高催化性能,Morpholine模板的FER热带石表现出高稳定性和活性.
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:
- 甲基乙烯二甲基 (DME) 碳化对于从合成气中合成乙醇至关重要.
- 摩登石 (MOR) 热石对这种反应具有有限的催化稳定性.
研究的目的:
- 开发高稳定性和活性的FER热酸纳米板,用于DME碳化.
- 为了研究有机模板对FER热酸的酸位分布和催化性能的影响.
主要方法:
- 使用四种不同的有机模板合成FER热酸纳米片.
- 催化测试DME碳化.
- 使用DFT计算,NH3-IR,MAS NMR和in situ DRIFTS进行表征.
主要成果:
- 催化性能受到强酸位点的位置的强烈影响,由有机模板调节.
- 与形态素合成的FER-MORP样本实现了53%的DME转化和0.889 mmol g-1 h-1的甲基时空收益率 (STYMA).
- 吗啡因将强大的布伦斯特德酸位点 (BAS) 导向8个环 (8-MR) 通道,增强活性并抑制焦炭形成.
结论:
- 通过模板设计优化FER热带石中的酸位点位置是有效的DME碳化定位的关键.
- 开发的FER热酸纳米板在4次回收过程中表现出卓越的催化稳定性 (大约4次). 460小时) 的时间.
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