Kumar
71 posts
TimePosted 23/11/2011 10:19:53
Kumar says

Explosion risks of CO

CO generation is avoided in kiln operation to avoid heat losses, reducing atmosphere and explosion risks. When having ESP upstream a limit is set for firing to trip or fuel reduction. I want to know about the reaction or mechanism or how this CO causes explosion.

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Ted Krapkat
536 posts
TimePosted 24/11/2011 02:54:19

Re: Explosion risks of CO

Hello Dogra,

CO reacts with oxygen in the air according to the following reaction;-

2CO + O2 ---> 2CO2

The explosive range for CO & O2 mixtures is dependant on the ratio of CO to O2, the pressure, the ignition temperature, and the presence of other gases, (particularly water vapour).

For CO in air, at atmospheric pressure, the explosion range is generally given as 12.5%v/v to 74.2%v/v CO with a minimum ignition temperature of ~605 degC.

Regards,

Ted.

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Kumar
71 posts
TimePosted 24/11/2011 06:31:18
Kumar says

Re: Explosion risks of CO

Thanks!

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chari
79 posts
TimePosted 24/11/2011 09:18:12
chari says

Re: Explosion risks of CO

The CO explosion takes place if the CO concentration is as mentiond below at atmospheric conditions

Below 50 ppm - Safe

from 50 ppm to 1200 ppm - Unsafe

from 1200 ppm to 125000 ppm - dengerous

from 125000ppm to 750000 ppm - highly explosive

above 750000 ppm - non explosive

 

The lower explosion limit is 12.5%(125000ppm) 

the Higher explosion limit is 75%(750000ppm)

chari

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