FE-BASED FISCHER TROPSCH SYNTHESIS OF BIOMASS-DERIVED SYNGAS: EFFECT OF SYNTHESIS METHOD

摘要

Lignocellulosic biomass is a promising feedstock for producing liquid fuels via synthetic gas (syngas) and Fischer Tropsch Synthesis (FTS). Syngas produced from biomass is characterized by low H2/CO ratio and CO2 concentrations (typically 15-20-%). Among the most active metals for FTS (Fe, Co, Ru, Ni), iron-based catalysts are the only catalysts that show significant WGS activity and are widely used for FTS of H2 deficient syngas . Fe-based catalysts for FTS contain several promoters. These include copper (Cu), potassium (K) and Zinc (Zn). Cu and K are used to enhance the reduction and carburization activity of the catalyst, respectively. Zn is used as a structural promoter that prevents iron clusters from sintering, and stabilizes the surface area of iron oxide.