Heterogeneous catalysis in an oscillatory baffled flow reactor
Heterogeneous catalysis in an oscillatory baffled flow reactor
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DOI：
10.1039/c3cy00282a
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发表时间：
2013-01-01
影响因子：
5
通讯作者：
Wilson, Karen
中科院分区：
文献类型：
--
作者：
Eze, Valentine C.;Phan, Anh N.;Wilson, Karen
报道了在振荡折流板反应器（OBR）中的多相催化的第一个演示，以固体酸催化有机酸的酯化反应为例，这是精细化学品和生物燃料合成的重要原型反应。PrSO 3 H-SBA-15催化剂粉末的悬浮在振荡流下容易地在OBR内实现，促进己酸的连续酯化。OBR和传统的搅拌间歇反应动力学之间获得了极好的半定量一致性，证明了有效的混合，并突出了OBR用于连续、非均相催化液相转化的潜力。动力学分析突出了酸链长度（即空间因子）作为活性的关键预测因子。与间歇操作相比，连续酯化提供了改进的酯产率，由于从催化剂中去除了水副产物，证明了OBR用于非均相流动化学的多功能性和作为新的清洁催化技术的潜在作用。
The first demonstration of heterogeneous catalysis within an oscillatory baffled flow reactor (OBR) is reported, exemplified by the solid acid catalysed esterification of organic acids, an important prototypical reaction for fine chemicals and biofuel synthesis. Suspension of a PrSO3H-SBA-15 catalyst powder is readily achieved within the OBR under an oscillatory flow, facilitating the continuous esterification of hexanoic acid. Excellent semi-quantitative agreement is obtained between OBR and conventional stirred batch reaction kinetics, demonstrating efficient mixing, and highlighting the potential of OBRs for continuous, heterogeneously catalysed liquid phase transformations. Kinetic analysis highlights acid chain length (i.e. steric factors) as a key predictor of activity. Continuous esterification offers improved ester yields compared with batch operation, due to the removal of water by-product from the catalyst, evidencing the versatility of the OBR for heterogeneous flow chemistry and potential role as a new clean catalytic technology.