pyrolysis
Means burning at very high temperature in absence of air.
Temperature between 500 0 C to 1000 0C
Three components are generated
◦Gas: mixture of combustible gases such as hydrogen, carbon dioxide, methane, carbon mono-oxide and some hydrocarbons.
◦Liquid: mixture of tar, pitch, light oil, and low boiling organic chemicals like acetic acid, acetone, methanol etc.
◦Char: mixture of elemental carbon and inert solid material from waste
Have high calorific values - can be used for oil production