A structure-based mass-transfer model for turbulent fluidized beds (TFBs) was established according to mass conservation and the balance of mass transfer and reaction. Unlike the traditional method, which assumes a homogeneous structure, this model considered the presence of voids and particle clusters in TFBs and built correlations for each phase. The flow parameters were solved based on a previously proposed structure-based drag model. The catalytic combustion of methane at three temperatures and ozone decomposition at various gas velocities were used to validate the model. The TFB reactions comprised intrinsic reaction kinetics, internal diffusion, and external diffusion. The simulation results, which compared favorably with experimental data and were better than those based on the average method, demonstrated that methane was primarily consumed at the bottom of the bed and the methane concentration was closely related to the presence of the catalyst. The flow and diffusion had an important effect on the methane concentration. This model also predicted the outlet concentrations for ozone decomposition, which increased with increasing gas velocity. Interphase mass transfer was presented as the limiting step for this system. This structure-based mass-transfer model is important for the industrial application of TFBs.

根据质量守恒和传质与反应的平衡，建立了基于结构的湍流化床传质模型。与假定均质结构的传统方法不同，此模型考虑了TFB中存在空隙和粒子簇的情况，并为每个阶段建立了相关性。基于先前提出的基于结构的阻力模型来求解流动参数。该模型在三个温度下甲烷的催化燃烧和在不同气体速度下的臭氧分解被用于验证该模型。TFB反应包括内在反应动力学，内部扩散和外部扩散。仿真结果与实验数据相吻合，并且优于基于平均法的仿真结果，证明甲烷主要在床的底部被消耗，并且甲烷的浓度与催化剂的存在密切相关。流动和扩散对甲烷浓度具有重要影响。该模型还预测了臭氧分解的出口浓度，该浓度随气体速度的增加而增加。相间传质被认为是该系统的限制步骤。这种基于结构的传质模型对于TFBs的工业应用非常重要。相间传质被认为是该系统的限制步骤。这种基于结构的传质模型对于TFBs的工业应用非常重要。相间传质被认为是该系统的限制步骤。这种基于结构的传质模型对于TFBs的工业应用非常重要。