Pyrolysis oil is a complex product with several by-products that are generated during the process. Understanding these by-products is crucial for optimizing the pyrolysis process and maximizing its benefits.
5 Key By-Products You Should Know
1. Biochar
Biochar is a solid by-product of pyrolysis. It consists of organic matter with a high carbon content and ash. The typical yield from high-temperature pyrolysis is about 20%. Slow pyrolysis can produce more char, up to 50%.
2. Syngas
Syngas is another by-product of pyrolysis. It is mainly composed of carbon dioxide, carbon monoxide, hydrogen, low carbon number hydrocarbons, nitrogen oxide, sulfur oxide, and other compounds. The yield of syngas typically ranges from 12-15%.
3. Ash
Ash is a solid by-product that may contain heavy metals that were present in the biomass feedstock. The distribution of ash depends on the design of the pyrolysis reactor and the characteristics of the raw materials.
4. Pyrolytic Gas
Pyrolytic gas is produced during the pyrolysis process. It includes compounds like carbon dioxide, carbon monoxide, hydrogen, and low carbon number hydrocarbons. The yield of pyrolytic gas typically ranges from 12-15%.
5. Tar
Tar is a viscous liquid by-product composed of hydrocarbons and free carbon. It is different from bio-oil, which is a more pure and less viscous form of organic compounds. Crude bio-oil may require purification to become commercial grade bio-oil.
Continue Exploring, Consult Our Experts
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