AIR AND AIR-STEAM BIOMASS GASIFICATION IN INTERCONNECTED, INTERNALLY CIRCULATING FLUIDIZED BEDS

We report on recent investigations of biomass gasification in a 25 kWth dual-bed internally circulating fluidized bed (ICFB) gasifier. Experiments were performed under air and air-steam gasification regimes using various feeding rates of beech wood chips to generate a broad range of operating data. The hydrogen content in the producer gas had a clear dependence on the steam content in the oxidizer gas fed to the gasification zone. Optimum operating conditions were determined in order to maximize hydrogen production (45 % vol. dry).