Spatially and temporally resolved gas distributions around heterogeneous catalysts using infrared planar laser-induced fluorescence.
Nat Commun
; 6: 7076, 2015 May 08.
Article
em En
| MEDLINE
| ID: mdl-25953006
ABSTRACT
Visualizing and measuring the gas distribution in close proximity to a working catalyst is crucial for understanding how the catalytic activity depends on the structure of the catalyst. However, existing methods are not able to fully determine the gas distribution during a catalytic process. Here we report on how the distribution of a gas during a catalytic reaction can be imaged in situ with high spatial (400 µm) and temporal (15 µs) resolution using infrared planar laser-induced fluorescence. The technique is demonstrated by monitoring, in real-time, the distribution of carbon dioxide during catalytic oxidation of carbon monoxide above powder catalysts. Furthermore, we demonstrate the versatility and potential of the technique in catalysis research by providing a proof-of-principle demonstration of how the activity of several catalysts can be measured simultaneously, either in the same reactor chamber, or in parallel, in different reactor tubes.
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MEDLINE
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En
Ano de publicação:
2015
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Article