Optimization of a Scalable Photochemical Reactor for Reactions with Singlet Oxygen
Optimization of a Scalable Photochemical Reactor for Reactions with Singlet Oxygen
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DOI：
10.1021/op500181z
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发表时间：
2014-11-01
影响因子：
3.4
通讯作者：
Lapkin, Alexei A.
中科院分区：
文献类型：
--
作者：
Loponov, Konstantin N.;Lopes, Joao;Lapkin, Alexei A.
在几个连续流光化学反应器中，详细研究了光化学生成的单线态氧（O-1(2)）对α -蒎烯的氧化作用。利用草酸铁光光度测定法和反应动力学数据来比较光源和反应器的几何形状，如浸没井、环形再循环和微流体反应器。结果表明，反应器的小型化、光的强度和光谱组成的控制以及氧气压力的提高是实现安全高效光氧化反应的关键因素。与所有其他系统相比，由于更好的能量利用率，微反应器- led组件通常获得更高的量子产率。对于单相微电抗器- led系统，建立了一个优化模型，揭示了一个广泛的优化设计窗口。
Oxygenation of alpha-pinene using photochemically generated singlet oxygen (O-1(2)) was studied in detail in several continuous flow photochemical reactors. Ferrioxalate actinometry and reaction kinetic data were used to compare light sources and reactor geometries, such as the immersed-well, an annular recirculating and microfluidic reactors. It is shown that reactor miniaturization, control of intensity and of spectral composition of light, and elevated oxygen pressure are the crucial factors for safe and efficient photo-oxygenation reactions. Higher quantum yields were generally obtained with the microreactor-LED assemblies due to better energy utilization, compared to all other systems studied. For the single-phase microreactor-LED system, an optimization model has been developed that revealed a broad optimal design window.