Abstract: In the experiment using steam as gasification agent, the conversion of biomass consists of two processes, pyrolysis and gasification, which produce gases with main constituents of H₂, CO, CO₂, CH₄, tar and carbon. The yield and distribution of products in pyrolysis depend on temperature, heating rate and grain size. According to the experiment, higher temperature and smaller size of feedstock will be propitious to produce gas with higher heating value. The impact of particle size can be interpreted by the theory of non-homogeneous reaction. Under the operating conditions of pyrolysis, temperature is the decisive factor in the reacting process, and the change of heating rate does not have much impact on the gasification. Under the optimum conditions,the created gas with high heating value of 10 MJ/Nm³ and yield of 1.7 m³/kg were obtained.

Key words: sugarcane bagasse, pyrolysis, gasification, mechanism analysis