Biomass can converted to charcoal, liquid, and gaseous products via a carbonization process at different temperatures. The chemical composition and yields of the charcoal gas, condensed liquid and tar were determined as functions of the carbonization temperature. The charcoal yield decreased gradually from 42.6 to 30.7% for the hazelnut shell and from 35.6 to 22.7% for the hardwood,vith an increase of temperature from 550 to 1150 K while the charcoal yield from the lignin content decreased sharply from 42.5 to 21.7% until at 850 K during the carbonization procedures. The charcoal yield decreases as the temperature increases. The production of the liquid action has a maximum at a temperature between 650 and 750 K The ignition temperature of charcoal increases as the carbonization temperature increases.