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Temperature fluctuations (flickering) of catalytic wires and gauzes — II experimental study of butane oxidation on platinum wires

✍ Scribed by William M. Edwards; Frank L. Worley Jr.; Dan Luss

Publisher: Elsevier Science
Year: 1973
Tongue: English
Weight: 1005 KB
Volume: 28
Category: Article
ISSN: 0009-2509
DOI: 10.1016/0009-2509(73)85152-8

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✦ Synopsis

An experimental study of butane oxidation on various platinum wires revealed the existence of local temperature fluctuations (flickering). These fluctuations were measured by an infrared detector and various statistics of this random process were determined. It was found that the amplitude and frequency of the temperature fluctuations increase with decreasing wire diameter. When the average temperature at a given point on the wire is close to the extinction temperature, a rapid decrease in the frequency of the local fluctuations is noted. The experiments indicate that a certain similarity exists between flickering and turbulent velocity fluctuations of the reacting stream.

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Temperature fluctuations (flickering) of catalytic wires and gauzes—I Theoretical investigation

✍ Michael A. Ervin; Dan Luss 📂 Article 📅 1972 🏛 Elsevier Science 🌐 English ⚖ 588 KB

When chemical reactions occur on catalytic wires or gauzes random surface temperature fluctuations are sometimes observed, and this "flickering" is most predominant in ammonia oxidation convertors. It is shown that the large temperature oscillations of the catalytic surface are most probably due to