Wood pyrolysis is a process that produces several valuable byproducts.
4 Key Byproducts of Wood Pyrolysis
1. Bio-oil
Bio-oil is the most valuable product of wood pyrolysis. It is a complex mixture of hundreds of organic compounds. These include alcohols, ketones, aldehydes, phenols, and oligomers. The composition of bio-oil can vary depending on the type of wood and the specific pyrolysis process parameters.
2. Bio-char
Bio-char is a solid byproduct of wood pyrolysis. It is the residual product after the volatilization of wood in the absence of oxygen. Bio-char has low volatility and high carbon content. It can be used as a soil amendment or as a source of renewable energy through combustion.
3. Pyrolytic Gas
Pyrolytic gas is a gaseous byproduct of wood pyrolysis. It is mainly composed of carbon dioxide, carbon monoxide, hydrogen, low carbon number hydrocarbons, nitrogen oxide, sulfur oxide, and other gases. The composition of pyrolytic gas can vary depending on the pyrolysis conditions.
4. Yield Variations
The proportion of these byproducts can vary depending on factors such as the composition of the wood and the specific pyrolysis process parameters. Typically, the yields of bio-oil, bio-char, and pyrolytic gas range from 50 wt%-70 wt%, 13 wt%-25 wt%, and 12 wt%-15 wt%, respectively.
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