How does gasification work?
The feedstock is prepared and fed to a gasifier in either a dry form or as slurry (mixed with water). In the gasifier, which is a robust reactor vessel, the feedstock reacts with steam and air or oxygen (O₂) at high temperature and pressure in a reducing (oxygen-starved) atmosphere. These conditions produce the syngas, which is made up primarily of carbon monoxide and hydrogen, and smaller quantities of carbon dioxide and methane (CH₄).

The high temperature in the gasifier converts the inorganic materials left behind by gasification and fuses them into a glassy material, generally referred to as slag. The slag has the consistency of coarse sand. It is chemically inert and may have a variety of uses in the construction and building industries.