The adsorption of 1,2,4-trimethylbenzene (TMB) on beaded activated carbon (BAC) in a six-stage countercurrent fluidized bed adsorber was simulated employing a two-phase model, assuming the gas in particulate phase to be either in plug flow (EGPF model) or in perfectly mixed flow (EGPM model). A rather simple model considering equilibrium state on each stage (Equilibrium model) was also used for comparison. Simulation results were compared with experimental data obtained at different values of adsorbent feed rate, superficial gas velocity, TMB initial concentration and weir height (which influences the effective bed height). The results demonstrate that the Equilibrium model overpredicts the overall removal efficiencies when the adsorbate-adsorbent system is far from equilibrium condition. On the other hand, both EGPF and EGPM show good agreement with the experimental results over industrially relevant operating conditions. Stage-wise removal efficiencies show that the EGPF model tends to predict removal efficiency better than EGPM when the weir height is high. The sensitivity analysis of the EGPM model indicates that internal diffusion within the BAC is rate-limiting for adsorption, while BAC diameter strongly influences the overall removal efficiency and can be optimized for different conditions. The effect of changes in BAC adsorption capacity on overall removal efficiency depends on the number of available adsorption sites, as well as proximity to equilibrium condition. The model developed in this study is also able to predict the effect of the number of stages on overall removal efficiency of the adsorber. The results of this study could pave the way for optimizing the design and operation of fluidized bed adsorbers, leading to cost savings and performance improvements.

使用两相模型模拟了六阶段逆流流化床吸附器中的1,2,4-三甲基苯（TMB）在珠状活性炭（BAC）上的吸附，假设颗粒相中的气体处于活塞流中（EGPF模型）或完全混合流（EGPM模型）。还使用了一个比较简单的模型来考虑每个阶段的平衡状态（均衡模型）。将模拟结果与在不同的吸附剂进料速度，表观气体速度，TMB初始浓度和堰高度（影响有效床高度）下获得的实验数据进行了比较。结果表明，当吸附物-吸附剂系统远离平衡状态时，平衡模型会过高地预测整体去除效率。另一方面，EGPF和EGPM在与工业相关的运行条件下均与实验结果显示出良好的一致性。分阶段去除效率表明，当堰高较高时，EGPF模型往往比EGPM更好地预测去除效率。EGPM模型的敏感性分析表明，BAC内的内部扩散限制了吸附速率，而BAC直径强烈影响整体去除效率，可以针对不同条件进行优化。BAC吸附容量变化对总体去除效率的影响取决于可用吸附位点的数量以及接近平衡条件的程度。在这项研究中开发的模型还能够预测级数对吸附器整体去除效率的影响。