This work presents a numerical and experimental investigation of sawdust gasification in a fluidized bed using air. The fluidized bed reactor was tested in the Faculty of Engineering, Mansoura University, Egypt. In the experimental part, the experiments were made in a fluidized bed gasifier to optimize the gasifying of sawdust pellets using air. The syngas composed mainly of CO, H₂, CH₄, and CO₂ as in the typical gasification process. The obtained experimental results showed that the syngas contents are strongly affected by the equivalence ratio and temperature. Increasing of ER improves char burning to produce more CO₂, but H₂ gradually increased till ER = 0.35 instead of CH₄, CO and H₂ increased as temperature increased. The temperature of 900 °C and an equivalence ratio of 0.35 is the right combination of sawdust gasification as operating conditions. A kinetic-hydrodynamic one-dimensional model was developed and validated with experimental results. This model is used to expect the effect of various operating parameters on a biomass gasification performance, such as temperature, equivalence ratio, and different hydrodynamic parameters. This model capable of expects the axial gas composition along the gasifier, as well as the syngas composition and heating value of produced gas and the gasification efficiency at the reactor outlet. The model results were in reasonable agreement with experimental results and published results.

这项工作提供了使用空气在流化床中锯末气化的数值和实验研究。流化床反应器在埃及曼苏拉大学工程学院进行了测试。在实验部分中，在流化床气化炉中进行实验，以优化使用空气对木屑颗粒进行气化。在典型的气化过程中，合成气主要由CO，H ₂，CH ₄和CO _2组成。所得实验结果表明，当量比和温度对合成气含量有很大影响。ER的增加可改善炭燃烧，从而产生更多的CO ₂，但H ₂逐渐增加，直至ER = 0.35代替CH ₄，CO和H ₂随着温度升高而升高。900°C的温度和0.35的当量比是将锯末气化作为操作条件的正确组合。建立了动力学-流体动力学一维模型，并通过实验结果进行了验证。该模型用于预期各种操作参数对生物质气化性能的影响，例如温度，当量比和不同的流体力学参数。该模型能够预期沿气化炉的轴向气体组成，以及合成气的组成和产生气的热值以及反应器出口处的气化效率。模型结果与实验结果和公开结果合理吻合。