While this isn't about burning wood in a stove its a good read! I was looking up some info on cooking and smoking wood. I never cared for a propane barbeque grill I always felt I could taste it in the meat. So until last year I was cooking on charcoal. Since last year I have switched over to cooking on wood. And I feel it tastes the best and gives it a nice smoke flavor too.
http://www.amazingribs.com/tips_and_technique/zen_of_wood.html
Billy
Wood combustion, technically called pyrolysis, starts to take place in the 500 to 600°F range and requires significant amounts of oxygen. Let's call the combustion point 575°F on average for the sake of discussion. At that temp the wood has absorbed a lot of heat and the water has been driven off as vapor. It is ready to burn.
Primary combustion is the pyrolosis of the wood itself and secondary combustion is the pyrolosis of the gases emitted by the wood at high temps. It is the combustion of gases that produces flames. This pyrolysis of gases also produces most of the heat.
The main minerals in wood include oxygen, hydrogen, nitrogen, potassium, and carbon. There can also be trace amounts of sulfur, sodium, chlorine, and heavy metals. These minerals can significantly impact the aroma and smoke flavor.
Hardwoods have more minerals than softwoods, but their quantity is significantly influenced by where they are grown and in what soil, probably more than the species according to(broken link removed).
Let's say the coals or gas jets on your grill are 1,100°F an the surface of the coal or jets. If the wood surface is wet the wood cannot heat much beyond 212°F, the boiling point, until the water evaporates by turning to steam. The temp sticks there. It is the same principle as boiling potatoes in a pot water. No matter how much heat you apply to the pot, the potatoes cannot rise above 212°F until all the water is gone. Then, when they hit the bottom of the pan, they will get hotter and hotter as the water is driven out of them.
http://www.amazingribs.com/tips_and_technique/zen_of_wood.html
Billy