Dear Frans
Is it possible that the purple coloration of the flame is due to
potassium from wood ash?
Is the reddish coloration of a flame perhaps due to coolness? More
specifically, for example, if the TLUD was charged with fuels of
different moisture content, would the flame from the dry wood tend to
be blue or yellow, while the flame from the wood with higher moisture
content tend to be orange or red, simply because of the higher
moisture content lowering flame temperature?
Best wishes,
Kevin
Quoting Frans Peeters <[email protected]>:
Dean
Potasium spectral colour is 440nm purple
CO blue not verry energetic !
Hydrogen nearly invisible blue
Sodium yellow
Aluminium blue
Copper green
Strontium red
Now you can start a fire Works bussiness
Regards
Frans
Hi Stovers!
I've been noticing a shift from blue flames above the burning bio-char in a
TLUD to purple flames nearer the end of the burn when the bottom of the pile
is glowing bright orange. I suppose that the blue flame is caused by burning
CO but I wonder why the purple forms after the blue? The blue self
sustaining flame doesn't heat the water in the pot as well as the purple
flame phase although the pile of bio-char is fully ignited at that time and
may account for the more rapid rise in water temperature.
Any ideas?
Best,
Dean
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