By: Berlin On: Sat Sep 12, 2009 10:20 am
it's not the volitile content that causes the puffs, it's the specific volitles involved such as the carbon monoxide gas, hydrogen gas, and large amount of acetylene thats is produced by burning most bituminous coals among other gases and obtaining the right mix w/ oxygen. Remember wood is about 60% volitle matter. lignite is usually much less prone to "puffs" than bituminous or anthracite. however, any fuel being burned under low oxygen conditions such as are found in any relatively airtight appliance will puff or flashback shortly after loading during a hot fire if you open the loading door; since there's no reason to do so, just don't open the loading door right after loading a fresh load of fuel into the stove. as i mentioned, however, lignite is not more prone to this, but less. Lignite is an excellent fuel in the way that it burns and ease of use, however it's only real downside is that it's much less dense than other types of coal. a 12 hour burn might be possible if the firebox is loaded as full as possible.