Iron based catalysts for tar removal - downstream tests in real producer gas

Gasification is considered to be a promising way of upgrading biomass to a valuable secondary energy carrier. A major problem is hereby the presence of condensable hydrocarbons (tars) in the producer gas which complicate the further use of the gas. One possible solution to the problem is catalytic tar removal. When commercially available Ni-based catalysts are used, problems like carbon deactivation, sintering or sulphur poisoning have to be faced. Furthermore the in-situ usage of Ni-based catalysts in fluidized bed gasifiers is problematic due to Ni-contaminated dust load. Fe-based catalysts have the potential to solve some of the aforementioned problems and need to be tested under real conditions. In this study we show the ability of three newly developed Fe-based catalysts to reduce total tar content as well as the number of tar species in biomass gasification derived producer gas. The catalysts were tested downstream in the producer gas of a fluidized bed gasifier and a reduction of total tar content of 82     «

Gasification is considered to be a promising way of upgrading biomass to a valuable secondary energy carrier. A major problem is hereby the presence of condensable hydrocarbons (tars) in the producer gas which complicate the further use of the gas. One possible solution to the problem is catalytic tar removal. When commercially available Ni-based catalysts are used, problems like carbon deactivation, sintering or sulphur poisoning have to be faced. Furthermore the in-situ usage of Ni-based catal...     »