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Cs-Ba-Ru/La₂O₃-MgO 在温和条件下从微滴受限热解中获得高级NH₃合成的催化剂

Qishuai Zhu¹, Shunsheng Wang¹, Long Kuai¹

¹Department of Chemical Engineering, Key Laboratory of Production and Conversion of Green Hydrogen, Anhui Polytechnic University, Wuhu 241000, China.

Inorganic chemistry

|October 9, 2024

概括

兰氧化物-氧化物复合物支持显著增强基氨合成催化剂活性. 优化的催化剂在温和条件下实现高氨合成速率,表现出极好的稳定性.

科学领域:

不同质的催化剂.
材料科学是一种材料科学.
化学工程是化学工程的组成部分.

背景情况:

氨合成对于全球粮食生产至关重要.
在氧化 (MgO) 上支持的以为基础的催化剂对氨合成有希望.
支持的修改是提高催化剂性能的关键.

研究的目的:

研究基于MgO的复合材料 (MOx-MgO) 对合成的Cs-Ba-Ru催化剂活性的影响.
为了确定最佳的支成分和催化剂参数,以提高氨合成性能.

主要方法:

合成24个MOx-MgO复合支,使用微滴受限热解 (MDCPy) 方法.
通过浸制备Cs-Ba-Ru/MOx-MgO催化剂的方法.
在标准化氨合成条件下 (400°C,3MPa,H2/N2比为3:1) 评估催化剂活性.

主要成果:

与纯MgO相比,兰氧化物-氧化物 (La2O3-MgO) 复合物支持显著改善的氨合成活性.
最佳的Cs-Ba-Ru/La2O3-MgO催化剂达到大约7mol (NH3) /g (Ru) /h,使用0.25-0.5%的Ru负载.
优化的催化剂在氨合成过程中表现出良好的稳定性.

结论:

拉2O3-MgO复合体支对于增强基于Ru的氨合成催化剂非常有效.
优化Ru负载和支构成对于实现高活动和稳定性至关重要.
开发的催化剂为在温和条件下高效生产氨提供了一个有前途的途径.

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