At what extent catalyst performed a catalytic reaction. And what extent it behave like guize or thermally conducting barrier between the flam or gas it exposed ? If i used the THE MINERS LAMP ? Or other .....
Hello Kashan
You refer to the miner lamps.
The grid of the miner lamp is to avoid that the flame gets through the grid. We call this phenomena the quench of the reaction.
Your question about a catalyst is another subject.
To understand : a catalyst helps a reaction but it depends on the temperature.
Suppose catalyst temperature is high enough for gas oxidation : oxidation is able to rise temperature of the catalyst to higher values.
To complete my answer may be I can relate to you a story.
Some hydrocarbon detectors in air are catalytical. They are maintained at an adequate temperature. When a mixture of air and hydrocarbon (low concentration) enters in the detector the oxidation reaction raises the temperature and it can be correlated to a concentration. It is not very precise but enough for safety.
One of this detector was near a gazoline tank. One sunday the tank was overfilled so a cloud of gazoline vapour and air arrived on the detector (in the inflammability limit). The rise of temperature was high enough to destroy the detector and ignite the air gazoline mixture creating an explosive propagation of the flame.
then why h2s gas not cause explosion when we use these catalytic detector ?
although these detector worked on catalytic oxidation ?
do it depend upon explosion limit gas in as its ppm in air ?
can we used same detector for Gasoline leakage in air ? if yes then it cause explosion is it ?
In fact the same detector (for catalytical detectors) can be used for different gases but with different calibration. For IR detector it is different.
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