Chemical and electro-chemical applications of in situ microwave heating
Chemical and electro-chemical applications of in situ microwave heating
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DOI：
10.1039/b703986g
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发表时间：
2008-06
期刊：
影响因子：
--
通讯作者：
F. Marken
中科院分区：
文献类型：
--
作者：
F. Marken
微波能量可以容易地集中并输送到化学或电化学反应器系统中。与传统加热相比，微波辐射引入的热效应更局部化，并且可以实现更高的能量传递速率（更快的加热和冷却循环）。本报告总结了一些最新的发展，其中微波活化在化学过程中的好处已被观察到或微波在化学中的新应用已经出现。在这个迅速扩大的领域提供了一个选择的参考文献和评论，特别强调的是在均匀和非均匀的微波场与强场聚焦的对比过程。对于原位微波活化电化学过程的聚焦效应被证明导致微波活化的只有在金属电极表面附近的溶液相。观察到强的温度梯度和导致极高的质量传输和电流密度的新物理现象。
Microwave energy can be readily focused and delivered into chemical or electrochemical reactor systems. The thermal effects introduced by microwave radiation are more localised when compared to conventional heating and a much higher rate of energy delivery (faster heating and cooling cycles) can be achieved. This report summarises some recent developments where benefits from microwave activation in chemical processes have been observed or novel applications of microwaves in chemistry have emerged. A selection of references and reviews in this rapidly expanding field are provided and particular emphasis is on contrasting processes in homogeneous and in heterogeneous microwave fields with strong field focusing. For in situ microwave activated electrochemical processes the focusing effect is demonstrated to lead to microwave activation of only the solution phase in the vicinity of the metal electrode surface. Strong temperature gradients are observed and novel physical phenomena leading to extremely high mass transport and current densities.