树突性ZSM-5热石作为高活性催化剂,用于对单烯环氧化物进行价值化
Luis A Gallego-Villada1,2, Jennifer Cueto3, María Del Mar Alonso-Doncel3
1Laboratory of Industrial Chemistry and Reaction Engineering, Johan Gadolin Process Chemistry Centre, Åbo Akademi University Henriksgatan 2 20500 Turku/Åbo Finland dmitry.murzin@abo.fi.
Green chemistry : an international journal and green chemistry resource : GC
|September 23, 2024
概括
树突性ZSM-5热石有效地将单烯环氧化物异构化为有价值的香料和制药化合物. 树突性焦岩 (d-ZSM-5/4d) 显示出优越的活性和选择性,在空气化后恢复了催化功能.
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
- 有机化学 有机化学
背景情况:
- 单烯环氧化物是用于香水,化品和药品的高价值化合物的前体.
- 这些环氧化物的高效催化转化对于工业应用至关重要.
- 石催化剂为选择性化学转换提供可调节的特性.
研究的目的:
- 为了研究使用树突式ZSM-5化物对单烯环氧化物的异构化.
- 为了确定这种反应中最活跃和最有选择性的树突性焦化物催化剂.
- 了解控制异构化过程的结构-活性关系.
主要方法:
- 树突型ZSM-5热质的合成和表征 (XRD,Ar物理吸收,皮里丁-FTIR,TEM,FTIR/DTBPyr,27Al MAS NMR). 它们的基因是:
- 对于单烯环氧化物异构化的树突性石的催化试验.
- 反应产物的分析和动力参数的确定 (周转频率).
主要成果:
- 具有4天结晶 (d-ZSM-5/4d) 的树突性ZSM-5热石显示了利蒙-1,2-环氧化物 (LE) 异构化的最高活性 (TOF = 4.4 min−1).
- 使用d-ZSM-5/4d.获得了高产的二碳 (63%),坎普霍伦化物 (72.4%),和米尔塔纳尔 (47.7%).
- 催化剂性能与外部布伦斯特德酸位点和中孔表面积相关,克服了硬质/扩散限制.
结论:
- 树突性ZSM-5热质,特别是d-ZSM-5/4d,是单烯环氧化物异构化的高效催化剂.
- 催化剂的结构,有丰富的外部酸位和大的中孔面积,是其卓越性能的关键.
- 该d-ZSM-5/4d催化剂是强大的,并通过空气化可再生.
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