This paper evaluates and quantifies the environmental impact from the use of syngas in internal combustion engines associated with downdraft gasifier, considering technical, economical and ecological aspects. The ecological efficiency concept depends on the environmental impact caused by CO2,...

The updraft biomass gasifiers currently available produce a gas with high tar content. For almost all downstream applications a substantial reduction of the tar concentration is required. The gravimetric tar concentration behavior in producer gas, obtained at a modified updraft fixed bed...