The design and testing of kinetically-appropriate operando spectroscopic cells for investigating heterogeneous catalytic reactions.
The design and testing of kinetically-appropriate operando spectroscopic cells for investigating heterogeneous catalytic reactions.
复制标题
DOI：
10.1039/b919705m
复制
发表时间：
2010-11
影响因子：
46.2
通讯作者：
F. Meunier
中科院分区：
文献类型：
--
作者：
F. Meunier
本教程综述讨论了目前用于操作谱的一些反应池的设计(X射线吸收、UV-Vis、拉曼、透射式FTIR和漂移)以及与表观反应动力学的关系。束流效应、催化剂床层温度的控制和床层旁路是可能导致活性测量有缺陷的一些潜在问题。最后给出了四个实例，在这些实例中，粉末催化剂在常规反应器中测量的活性与在光谱池中测量的活性之间取得了很好的一致性。有人建议，反应堆之间的这种比较应该成为一种标准程序，以确保在典型的非理想光谱反应池上收集的数据的正确性。
This tutorial review discusses some of the current designs of reaction cells used for operando spectroscopy (X-ray absorption, UV-vis, Raman, transmission FTIR and DRIFTS) and the relation to the apparent reaction kinetics. Beam effects, the control of the catalyst bed temperature and bed by-pass are some of the potential problems that may lead to flawed activity measurements. Finally, four examples are given in which a good agreement was obtained between the activity of a powdered catalyst measured in a conventional reactor and in a spectroscopic cell. It is proposed that such comparison between reactors should become a standard procedure, to ensure the correctness of the data collected over typically non-ideal spectroscopic reaction cells.