In this study, fast ideal adsorbed solution theory was coupled with a two-phase bubbling bed approach to describe the adsorption of volatile organic compounds (VOCs) on zeolite in the presence of water vapor in a multistage fluidized bed adsorber. The binary adsorption of VOC-water vapor was predicted using their single component adsorption isotherms. The model was verified by experimental data obtained at a wide range of operating conditions before being used for studying the process intensification. Validation tests revealed that the model could accurately predict the experimental removal efficiencies (R² = 0.94), as well as VOC concentration profiles inside the bed (R² = 0.98). The intensification simulations showed that increasing the adsorbent feed rate is effective when there is a need for more adsorption sites (e.g. at high inlet concentrations), and is quite ineffective when the adsorption process is limited by low solid-gas contact time (e.g. high air flow rates). Increasing the adsorbent feed rate can also diminish the interference of water vapor in adsorption of VOC (even at RH as high as 75%). Reducing air flow rate at constant VOC load is always effective specially when there are enough adsorption sites available (e.g. high adsorbent feed rate, and low VOC loads and RHs). Similarly, increasing the number of stages can effectively improve the fluidized bed performance at high adsorbent feed rates and low VOC inlet concentrations and RHs. Using 3 adsorbers of 2 stages instead of 1 adsorber of 6 stages can improve the removal efficiency up to 34.5% in the range of operating conditions simulated. While having the same high weir height along the bed yields better performance than having the same low weir height, an optimized arrangement of weir heights in a descending order from the top to the bottom of the bed would maximize the removal efficiency.

在这项研究中，快速理想吸附溶液理论与两相鼓泡床方法相结合，描述了在多级流化床吸附器中在水蒸气存在下沸石上挥发性有机化合物（VOC）的吸附。使用VOC-水蒸气的单组分吸附等温线预测了VOC-水蒸气的二元吸附。在用于研究过程强化之前，通过在各种操作条件下获得的实验数据验证了该模型。验证测试表明，该模型可以准确预测实验去除效率（R ²  = 0.94）以及床内VOC浓度曲线（R ² = 0.98）。强化模拟表明，当需要更多的吸附位置时（例如，在高进口浓度下），增加吸附剂的进料速度是有效的；而当吸附过程受固-气接触时间短（例如，高空气量）的限制时，则是完全无效的。流量）。增加吸附剂的进料速度还可以减少水蒸气对VOC吸附的干扰（即使在相对湿度高达75％的情况下）。在有足够的吸附位置（例如高吸附剂进料速度，低VOC负载和相对湿度）的情况下，在恒定的VOC负载下降低空气流量总是特别有效的。同样，增加级数可以有效地提高高吸附剂进料速率和低VOC入口浓度和RHs下的流化床性能。在模拟的运行条件范围内，使用2个阶段的3个吸附器代替6个阶段的1个吸附器可以将去除效率提高到34.5％。沿床具有相同的高堰高度会比具有相同的低堰高度产生更好的性能，但堰高从床的顶部到底部的降序排列的优化布置将使去除效率最大化。