Copied from the discussion at http://www.backpackinglight.com/cgi-bin/backpackinglight/forums/thread_display.html?forum_thread_id=79177&skip_to_post=674764#674764
> Carbon monoxide in camping stoves is caused by exhaust getting into the intake by recirculation currents.
I have to disagree with you here. Carbon monoxide results from incomplete combustion: that's basic chemistry.
For there to be incomplete combustion one of two conditions have to apply: flame quenching or insufficient oxygen. In the case of a small camping stove being run in open air or with adequate ventilation, I find it hard to imagine that 'inadequate oxygen' could apply.
> He QUITE disagrees with the cold pot quenching theory of CO production.
Tough. He needs to learn some basic chemistry.
> I got this information from a Professional Engineer that specialized in forensic
> reconstruction of combustion events (usually for use in lawsuits).
Sigh. Meaningless, and valueless.
My wife was on a jury once in a lawsuit about an injury. Both sides had qualified/certified engineers as technical witnesses. The two engineers testified radically differently: one had calculated that the forces involved were X (within OSHA limits) while the other had calculated that they were about double that (well outside OSHA limits). They could not both be right.
Later on I sat down and did the full analysis myself and I could see what each guy had done, and why one of the QUALIFIED engineers was wrong. 'Experts' have been wrong before.
> You can easily test this:
> 1) put an empty pot on the stove, let it get red hot and see if the CO stops
I have done that test many times, with continuous measurement. Yes, when the cold metal in the flame gets red hot the CO production often drops to ~0. Except when the stove is something like a Reactor, for which there is no hope.
> Exhaust recirculation also can be seen to be a factor in hanging stove or lantern
> CO creation as both types form an exhaust pool at the roof from which some can
> easily get back down to the intake.
Abstract theory, and using a false premise.
Practice is that the hot air circulates, and can be seen to drift out of the tent door. (Steam goes with it - makes a good photo with a flash.) If the tent was sealed and there was no wind at all, then you would have a real danger. But under such conditions who seals a tent up?
Sorry, but your theory does not apply to small camping stoves being used in bad weather.
Roger Caffin (BSc Hons, MSc, PhD, consultant research scientist)