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