Abstract: In this paper, the fluid-bed gasification technology is adapted to the conversion of biomass into energy. The gasifying agents characteristics have an important impact on gasification process and the products. A thermodynamics equilibrium model was built to predict the gasification results with typical biomass resource i.e. straw, as raw material. By analyzing the key factors in gasification, an optimization gasification results with the agent of steam and air was drawn. It was found that the steam/air is 0.05 and the temperature was 1 270 K, effective gas component (CO、H₂、CH₄) can reach 25.7%.

Key words: biomass, gasifying agent, fluid-bed, gasification