Gasification
Principles
Fuel gas or chemical feedstock gas (syngas)
Heating biomass with amount of oxygen or air in gasification reactor
Conversion process of biomass into a combustible gas mixture by partial oxidation at high temperature range 800-900°C.
Syngas can be burned in a gas turbine (GT) , gas engine (GE) , or integrated gasification combined cycle plant (IGCC) to produce power and heat.
Gas production is endothermic
high temperature 750-1800 °C conversion of solid, carbonaceous fuels into flammable gas mixture.
Achieved by supplying less oxygen than the stoichiometric requirement for complete combustion.
A central process between combustion (thermal degradation with excess oxygen) and pyrolysis at temperature range 600 and 1500°C
Benefits conventional options such as combustion or disposal by incineration.
Classification of method
Gasifier types
Gasification agent
Heating (temperature zone formation)
Gasification temperature
Gasification pressure
Fundamental phenomenon of biomass
Volatilization and gasification reaction
Volatilization
Char residue
Evaporation of inherent moisture
Evaporation of surface moisture
Char gasification
Type reactor
Down-draft Gasifier
Moving bed (Fixed bed)
Bubbling Fluidized Bed
Circulating Fluidized bed Gasifier
Char Gasification Reaction
Fluidized bed Gasifier
Up-draft Gasifier