双金属Ni-Fe系统的协同效应及其在聚乙烯聚醇的还原性氨化中的应用
Ruiying He1, Zhongpeng Zhu1, Weiping Zheng1
1Sinopec Research Institute of Petroleum Processing Co., LTD. Beijing 100083 P. R. China zhuzhongpeng.ripp@sinopec.com.
RSC advances
|April 17, 2024
概括
这项研究开发了新的双金属 - 铁催化剂,用于从聚乙醇 (PPG) 制造聚胺 (PEA). 优化的15Ni-7.5Fe/Al2O3催化剂实现了99%以上的转换,具有出色的稳定性.
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:
- 聚乙胺 (PEA) 在各种工业应用中至关重要.
- 从聚烯糖醇 (PPG) 有效合成PEA是一个持续的挑战.
- 双金属催化剂提供了增强催化性能的潜力.
研究的目的:
- 为了合成和描述新的双金属-铁 (Ni-Fe) 催化剂,支持玛- (γ-Al2O3).
- 研究这些催化剂在用于PEA生产的PPG的还原性氨化中的应用.
- 阐明Ni和Fe在催化系统中的协同效应.
主要方法:
- 催化剂合成涉及对γ-Al2O3.3.的不同Ni和Fe负载.
- 包括N2吸收,XRD,H2-TPR,EDX和XPS在内的表征技术.
- 在PPG的还原性氨化中对催化剂性能的评估.
主要成果:
- 双金属Ni-Fe催化剂表现出协同效应,增强了催化活性.
- 表面Ni0含量通过Fe的添加得到促进,其中15Ni-7.5Fe/Al2O3显示了最高的Ni0含量.
- 15Ni-7.5Fe/Al2O3催化剂的PPG转化率超过99%,具有很高的PEA选择性.
- 催化剂表现出极好的稳定性,在三个反应周期中没有观察到任何停用.
结论:
- 和铁之间的协同作用是催化剂高性能的关键.
- 铁作为促进剂,增加活性Ni0位点,提高催化效率.
- 开发的15Ni-7.5Fe/Al2O3催化剂是一种高效和稳定的选择,可用于通过PPG还原性氨基化进行工业PEA生产.
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