Wood pyrolysis gas is a complex mixture of gases and vapors that result from the thermal decomposition of wood's organic components under controlled conditions without oxygen.
4 Key Components of Wood Pyrolysis Gas Explained
Carbon Monoxide (CO) and Carbon Dioxide (CO2)
These gases are primarily produced from the breakdown of cellulose and hemicellulose during pyrolysis.
Cellulose, the main component of wood, undergoes thermal degradation at temperatures starting from 200-300 °C, leading to the formation of CO and CO2.
Hemicellulose, another major component, also contributes to the production of these gases through its decomposition.
Hydrogen (H2) and Methane (CH4)
These lighter gases are formed as byproducts of the pyrolysis reactions involving cellulose and lignin.
The decomposition of these organic compounds under high temperatures without oxygen leads to the formation of hydrogen and methane, which are valuable as fuel gases.
Volatile Organic Compounds (VOCs)
VOCs in wood pyrolysis gas include a variety of hydrocarbons, alcohols, aldehydes, ketones, and organic acids.
These compounds are derived from the breakdown of lignin and the other organic components of wood.
Lignin, a complex polymer, decomposes to yield phenolic compounds and other VOCs that contribute to the gas composition.
Other Components
Pyrolysis also produces condensable vapors such as oils, waxes, and tars, which can be collected once cooled.
These heavier compounds are formed from the more complex breakdown of wood's organic materials and contribute to the overall yield of pyrolysis products.
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