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ccenassau.org/energy-environment/heating-with-wood/comparing-combustion-equipment

All combustion is gasification: the wood (or other material) is heated to the point where volatile gases are released, and it is these gases that burn. In a single-stage system, many of the gases are released up the chimney before they're fully combusted (which means increased emissions and decreased efficiency).

www.auburn.edu/academic/forestry_wildlife/fire/combustion.htm

The combustion process or “fire” is sometimes called “rapid oxidation.” It is similar to the formation of rust on iron or the decay of dead wood in the forest, except that the process is drastically speeded up. ... temperature of the fuel is raised to the point where gases start to volatize. Pre-ignition – volatile materials in the ...

woodwoodland.com/can-wood-melt

But wood has many components and it is not a type of crystalline material. Before you heat it to the melting point, some components including lignin and cellulose will oxidize to burn. In this case, wood does not have a melting point, it only has a combustion point. Any wood will just burn like wood pellets in the stove.

io9.gizmodo.com/how-spontaneous-combustion-really-happens-698848769

Piles of hay, charcoal, wood chips, cotton, and even paper will sometimes spontaneously burst into flame. This isn't because they're too dry. It's because they were stacked up when ...

en.wikipedia.org/wiki/Autoignition_temperature

The autoignition temperature or kindling point of a substance is the lowest temperature in which it spontaneously ignites in a normal atmosphere without an external source of ignition, such as a flame or spark. This temperature is required to supply the activation energy needed for combustion.The temperature at which a chemical ignites decreases as the pressure or oxygen concentration increases.

homeguides.sfgate.com/temperatures-woodburning-stove-48039.html

Burning wood is a complex chemical reaction. When it starts initially, all that happens is the water in the wood evaporates or vaporizes. This process uses the initial energy of the reaction, and ...

www.southyorkshirefirewood.com/wood-burning-characteristics.html

Firewood should have a moisture content of below 30% at least for burning. The density of the wood also affects how long it needs to be seasoned for. Oak is a very dense wood and can take up to 2 years to season fully. The following is a list of common firewoods with a brief description of their burning characteristics.

www.arboristsite.com/community/threads/at-what-temperature-does-wood-combust...

Stable, seasoned wood probably doesn't being liberating more volatiles (remember it looses some with the moisture in seasoning/kilning) until exposure to a significant amount of heat. Funny you mentioned the blackened wood as that will take higher temperature to combust. I've got some of that in my house.

www.fs.fed.us/t-d/programs/fire/spark/html/74511201/74511201.html

The tests of the 1-in cube punky wood sample on the laboratory hot plate with steady heating (see table 2) was found smoking at 230° C (446F° ) and was totally consumed by glowing combustion within 7 minutes after the initial combustion on exposure to 300° C (572° F) for 40 sec.

www.weyerhaeuser.com/application/files/4415/3679/3491/Wood_and_Wood_Dust...

Wood Dust - NTP: According to its Report on Carcinogens, Fourteenth Edition, NTP states, “Wood dust is known to be a human carcinogen based on sufficient evidence of carcinogenicity from studies in humans”. An association between wood dust exposure and cancer of the nasal cavity has been