C), catalyst incorporation and steam reforming of produced pyrolysis liquid.
A process of great significance in industry for biomass processing and biomass based hydrogen production is gasification. It is a thermochemical conversion of solid carbon based fuel into gaseous fuel. Already discussed here steam reforming and pyrolysis are subparts of the entire gasification process. Gasification takes place in presence of oxygen and reforming agent (can be: air, oxygen, steam, carbon dioxide), most often superheated steam. Equivalence ratio of air is <1 so partial oxidation of gases takes place in order to maintain temperature necessary for the process. Main products of gasification are: syngas (H2 + CO), methane, tar, ash and other gases. In order to maximize hydrogen yield from gasification process high temperature superheated steam (900