Continuous Heterogeneously Catalyzed Oxidation of Benzyl Alcohol Using a Tube-in-Tube Membrane Microreactor
Continuous Heterogeneously Catalyzed Oxidation of Benzyl Alcohol Using a Tube-in-Tube Membrane Microreactor
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DOI：
10.1021/ie5041176
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发表时间：
2015-02
影响因子：
4.2
通讯作者：
Gaowei Wu;A. Constantinou;E. Cao;S. Kuhn;M. Morad;M. Sankar;D. Bethell;G. Hutchings;A. Gavriilidis
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文献类型：
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作者：
Gaowei Wu;A. Constantinou;E. Cao;S. Kuhn;M. Morad;M. Sankar;D. Bethell;G. Hutchings;A. Gavriilidis
研究了聚四氟乙烯AF-2400型管中式微反应器对苯甲醇的连续、无溶剂、催化氧氧化反应。半透性特氟龙AF-2400管作为气态氧化剂和液体基材之间的界面。由于这种接触方法的固有安全性，使用纯氧是可能的。用1wt%的Au-Pd/TiO2光催化剂颗粒填充半透膜管，置于聚四氟乙烯管内，形成一个用纯氧加压的环状区域。这种设计允许氧气在反应过程中通过内管连续穿透，导致催化剂床层中的氧气浓度更高，与使用氧气预饱和进料的反应器相比，显著提高了转化率。管中式微反应器中可供反应的氧气量比氧气预饱和进料的非渗透反应器高2个数量级。介绍了半渗透管式反应器的性能。
A Teflon AF-2400 tube-in-tube microreactor is investigated for the continuous, solvent-free, catalytic oxidation of benzyl alcohol with oxygen. The semipermeable Teflon AF-2400 tube acts as the interface between the gaseous oxidant and the liquid substrate. Because of the inherent safety of this contacting method, the use of pure oxygen is possible. The semipermeable tube was packed with 1 wt % Au–Pd/TiO2 catalyst particles and placed inside a PTFE tube to provide an annular region which was pressurized with pure oxygen. This design allowed continuous penetration of oxygen through the inner tube during the reaction, resulting in higher oxygen concentration in the catalyst bed and significantly improved conversion compared to a reactor operating with an oxygen presaturated feed. The amount of oxygen available for reaction in the tube-in-tube microreactor was 2 orders of magnitude higher than that in a nonpermeable reactor with oxygen presaturated feed. The semipermeable tube reactor performance in terms of...