Forced thermal cycling of catalytic reactions: Experiments and modelling
- 作者：Sø ; ren Jensen ; Jakob L. Olsen ; Sune Thorsteinsson ; Ole Hansen ; Ulrich J. Quaade
- 关键词：Microreactor ; Catalysis ; Temperature cycling
- 刊名：Catalysis Communications
- 出版年：2007
- 期刊代码：12_15667367
- 类别：ce
- 出版时间：December 2007
- 卷：8
- 期：12
- 页码：1985-1990
- 文件大小：243 K
摘要
Recent studies of catalytic reactions subjected to fast forced temperature oscillations have revealed a rate enhancement increasing with temperature oscillation frequency. We present detailed studies of the rate enhancement up to frequencies of 2.5 Hz. A maximum in the rate enhancement is observed at about 1 Hz. A model for the rate enhancement that includes the surface kinetics and the dynamic partial pressure variations in the reactor is introduced. The model predicts a levelling off of the rate enhancement with frequency at about 1 Hz. The experimentally observed decrease above 1 Hz is explained by dynamic thermal limitations of the reactor.