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高效的低负荷PdOx/AlSiOx催化剂用于乙烯二元化
Tatiana Otroshchenko1, Dmitry I Sharapa2, Elizaveta A Fedorova1
1Department of Advanced Methods for Applied Catalysis, Leibniz-Institut für Katalyse e.V. (LIKAT), Albert-Einstein-Str. 29a, D-18059, Rostock, Germany.
Angewandte Chemie (International ed. in English)
|July 7, 2024
概括
一种新型的异质催化剂与原子分散的使得高效的乙烯二元化. 这一突破为传统的同质催化剂提供了可持续的替代方案,提高了碳化合物生产的选择性和活动性.
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:
- 乙烯二聚化是一个关键的工业过程.
- 目前的方法依赖于同质的催化剂,这给分离和环境带来了挑战.
- 需要更高效和可持续的催化系统.
研究的目的:
- 开发一种高度活性和选择性的异质催化剂,用于乙烯二聚化.
- 了解催化活性背后的基本机制.
- 为了集成二分化催化剂与转化催化剂进行连续反应.
主要方法:
- 用原子分散的 (Pd) 合成异质催化剂.
- 在工业相关条件下的乙烯二聚化反应研究.
- 动力实验,催化剂表征 (例如,光谱,显微镜) 和密度函数理论 (DFT) 的计算.
- 在单个反应器中,将Pd催化剂与含有 (Mo) 的烯转化催化剂集成.
主要成果:
- 开发的异质Pd催化剂表现出高活性和对乙烯二聚变的选择性,性能优于现有的催化剂.
- 在42%的乙烯转化时达到80%的C4碳化合物选择性,在200°C时达到42%的乙烯转化.
- DFT计算和表征提供了对活跃地点 (孤立的Pd(II) Ox物种) 的见解.
- 综合系统通过顺序二分化和转化实现了98%的烯选择性.
结论:
- 在异质支上原子分散的Pd是乙烯二聚化的一种高度有效的催化剂.
- 催化剂在没有辅助催化剂或激活剂的情况下工作,简化了这一过程.
- 综合系统可从乙烯中有效地联合生产烯.
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