Dean,
If you are the only one seeing it, is that a purple "flame" or a "Purple Haze"? Maybe it's a generational thing. Tom From: [email protected] [mailto:[email protected]] On Behalf Of Dean Still Sent: Sunday, September 23, 2012 5:11 PM To: Discussion of biomass cooking stoves Subject: [Stoves] Purple flame 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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