In this paper a new scheme for the utilization of straw is proposed. The syngas is prepared by gasification of straw by two-stage downdraft fixed bed. The minimization of Gibbs free energy is used to study the parameters. Research shows that the concentration of H2 and CO can be increased by increasing the gasification reaction temperature and the best gasification reaction temperature should be set to 800 ~C. The pressure of the gasification reactor only needs to be slightly higher than the atmospheric pressure, 0.12 MPa is the best gasification pressure. The value of S/B should be determined...
