Wood Charcoal


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Wood Charcoal

 

a hard, porous, highly carbonaceous product formed during the heating of wood without access (or with limited access) of air in furnaces and retorts (sometimes in campfires as well). Depending on the type of wood, 1 m3 yields 140-180 kg of coal, 280-400 kg of liquid products, and nearly 80 kg of fuel gas. The heat of combustion of wood charcoal is 30,000-35,000 kJ/kg (7,000-8,100 kcal/kg). The density of birch coal is 380 kg/m3. Pines (300 kg/m3) and spruces (260 kg/m3) yield less dense coal.

The high porosity of wood charcoal is responsible for its significant adsorption properties. At normal temperature wood charcoal is capable of combining with the oxygen in air; this is the reason for cases of spontaneous combustion of wood charcoal. The moisture content of wood charcoal unloaded from furnaces and retorts is 2-4 percent. During storage, the moisture content rises to 7-15 percent. The ash content of charcoal should not exceed 3 percent and the content of volatiles, not more than 20 percent. A distinctive feature of wood charcoal is the low content of such admixtures as phosphorus and sulfur, which makes it indispensable in some metallurgical processes.

Wood charcoal is widely used in the production of crystalline silicon, carbon disulfide, activated carbon, and electrocarbon articles and as fuel for domestic use.

References in periodicals archive ?
Without such an alternative, wood charcoal would remain the primary household energy source for decades to come with disastrous consequences.
Based on the large size of the mound, on an abundance of marine resources, wood charcoal, ash and soot, thus the appearance of a black or prieta mound, and on the presence of small stone structures, Bird believed that the site was occupied by sedentary people living in pit-houses.
This wood charcoal was very valuable as a fuel and was never used in agriculture.
If you're using charcoal, try a combination of wood and lump wood charcoal.
They include making filters from cotton, sand, wood charcoal and ceramic materials, boiling water, adding air to water, using the sun to distill and disinfect, and using ultraviolet light to disinfect.
Several families in Haiti have tested the briquettes and liked them better than wood charcoal, Walter says.
I don't know it to be feasible but charcoal might be obtained merely by crushing up wood charcoal (not the coal-based briquettes) intended for grill use.
That difference is the filtering of the whiskey through maple wood charcoal, which removes some of the lighter congeners and emphasizes the deeper flavors.
With the help of sunlight concentrated by the Weizmann Institute's Canadian Institute for the Energies and Applied Research Solar Tower, the ore is heated to about 1,200 degrees C in a solar reactor in the presence of wood charcoal," said Weizmann.
Zilhao's proposal hinges on a review of the latest radiocarbon dates for charred seeds, shell artifacts, wood charcoal, and animal bones at 22 Neolithic locations.
Japanese researchers have developed a new construction material that uses wood charcoal to absorb chemical substances and odors thought to be linked to sick building syndrome (SBS), they said Monday.