|Biomass conversion process||Air supply||Temperature range (°C)||Products|
|Gasification||Less than stoichiometric oxygen required||800–1000||
(The syngas produced through gasification is predominately carbon monoxide, hydrogen, methane, and carbon dioxide).
Flue gas and ash.|
(Emissions of dioxins, furans).
|Pyrolysis||Absent of oxygen||350–600||
Bio-oil, syngas, char.|
(The gases and the bio-oil are from the volatile fraction of biomass, while the char is mostly the fixed carbon component).