John Polk wrote:All of the kerosene stoves that I have had/used needed to be preheated...with alcohol...before use.
Pressurized kerosene stoves are a relatively new phenomenon. I believe it's an attempt to increase heat yield for a given volume of fuel burned. For wick-type stoves, see:
http://kerostove.com/. The gravity feed stoves are recreations of stove types which were relatively common even in the US until the end of WWII.
Alcohol certainly seems to be a cleaner burning fuel.
See your old Trangia camping stove. Before it gets burning well, smokes smokes and smudges as much anything. Once it gets going, though, the biggest issue is the amount of moisture that re-condenses on the bottom of your pot!
I have this same question posed to the kerostoves vendor (also whether the two-burner multi-wick design is available with the higher-output burners.) I just don't want all my info coming from one source. Thus, the question here. A quick Google search produced nothing useful in the way of actually making bio-kerosene, though there are links to companies using it.
~ Charles