Side note, we are assuming all of he components of the fire triangle are present during this process.
Now that we have all of these gases being produced, all they need now is the minimum threshold temperature for combustion to occur. Stage 3: Gas Vapor Ignition and Combustion This is a turning point as the temperatures continue to rise. At this point we have hydrocarbon vapors, carbon monoxide, methane, water vapor, carbon dioxide, and a nice mix of other vapors. This process also creates a mixture of hydrocarbons in the form of liquid tar droplets and combustibles gases, and digging in is very complex. Pyrolysis “liberates organic gases and leaves carbon rich charcoal”. The chemical structure of the wood starts to break down and the process of pyrolysis begins. Stage 2 we still are not into the heat producing phase (maybe a tiny bit) but we are close! At this point, we are over five hundred degrees and temperatures are on the rise. Stage 2: The Vaporization of Hydrocarbon Compounds Once this process is complete, it leads to Stage 2. Water trapped inside of the wood is turned into steam and removed from the wood. During the moisture evaporation stage, instead of producing heat, heat is absorbed. Anyone who has ever tried to burn wet or unseasoned wood will find this stage very frustrating.
