So I've been playing with my new FeatherFire XL the last couple days, and have come up with a few questions and observations.
Everclear is only available at 75.5% in Michigan, not 95%. I used ~22ml to boil a pint of tap water with the stove throttled way down (in my kitchen). With the stove fully opened I then boiled a pint (after whole system had throroughly cooled) using ~18ml of 75% Everclear. My Ti-Tri is on the way... but still, I expected better fuel economy with the stove "simmer" setting. Any insight?
Second question: I've found mention that even pure grain alcohol (ethanol/ethyl alcohol/etc) releases formaldehyde in combustion. Is that true? If so, is there a fuel that doesn't release toxins when you burn it? By extension, I have access to 2 kinds of industrial ethanol, one of which is spectroscopic, totally pure unadulterated (though still petrochemically based, I think?) 199.99 proof. Would burning ~100% etoh be roughly 25% more fuel efficient than burning my 75% everclear? And further, even though that spectroscopic stuff is probably petrol based, would it ultimately release any more toxins than the everclear?