Possibilities of process intensification using microwaves applied to catalytic microreactors
Possibilities of process intensification using microwaves applied to catalytic microreactors
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DOI：
10.1016/j.cep.2007.05.021
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发表时间：
2007-09-01
影响因子：
4.3
通讯作者：
Turek, T.
中科院分区：
文献类型：
--
作者：
Cecilia, R.;Kunz, U.;Turek, T.
介绍了负载钯的聚合物/载体复合材料及其在催化微反应器中的应用。与传统的加热方法相比，这些复合材料在微米和纳米尺度上的特征尺寸使其非常适合研究微波辐射下催化剂的加热。采用实验和理论相结合的方法研究了微波辐照过程中热点的存在。计算结果与实验结果的比较表明，数学模型是准确的，并且没有明显的热点效应。热点温度升高引起的反应速率的提高是微波、多相催化和微反应器相结合的过程强化的基本要求。因此，已开发的模型已被用于研究哪种复合材料特性将允许上述效果的更高增加，为所有这些技术的现实组合开辟道路。(C) 2007 Elsevier B.V.版权所有
Pd loaded polymer/carrier composites and their utilisation in catalytic microreactors are presented. The characteristic dimensions on a micro- and nanometre scale make these composites well suited for studying the heating of the catalyst under microwave irradiation compared with traditional heating methods. Using an experimental and a theoretical approach the presence of hot spots during microwave irradiation was investigated. A comparison of the computed results with the experimental ones reveals the accuracy of the mathematical model as well as the absence of a pronounced hot-spot effect. An increase in the reaction rate caused by a temperature rise in the hot spots is a fundamental requirement for process intensification by the combination of microwaves, heterogeneous catalysis and microreactors. Therefore, the developed model has been used to investigate which of the composite material properties would allow a higher increase in the aforementioned effect, opening paths for a realistic combination of all these technologies. (C) 2007 Elsevier B.V. All rights reserved.