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Carbon Monoxide: Redux

OK, everyday I dirve by an integrated Steel Mill (one with a blast
furnace). Sometimes I see a blue burnoff flame, sometimes it is
yellow. Is one of these carbon monoxide? Is it from the balst
furnace or Coke ovens?
Reply to
Leonard Brick
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The typical blue color as seen on your home gas stove is the color associated with the temperature. Blue is richest in high temperatures. When there are other colors, like red, yellow, green, are due to cation impurities in the gas stream. Stimulated irradiation colors for the elements are extensively listed in many physical chemistry handbooks. I think sodium might be the yellow source, but can't find my pchem book.
Reply to
Jack Ferman
It's the BF, or possibly the BOF. COG is yellow.
Le> OK, everyday I dirve by an integrated Steel Mill (one with a blast
Reply to
David Kercsmar
Likely to be from the oxygen steelmaking, the gas from this process is harder to process as fuel than the coke oven or blast furnace gas. It would also fit with the change in colour of the gas. The composition of the gas from steel making varies a lot during the blow while the coke oven and blast furnace gasses are more stable in composition.
Reply to
David Deuchar

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