Abstract This work introduces novel scenarios for the breakthrough curve modeling of an adsorption column/depth filtration hybrid system. Four well-known theoretical breakthrough models including Thomas, Adams–Bohart, Yoon–Nelson, and BDST were employed to describe the normalized concentration profiles. In the first approach, the theoretical models were combined for better estimation of the breakthrough curves and the Thomas/Yoon–Nelson and Thomas/BDST combinations were obtained as the best extensions. In the second approach, an adsorption-transport model was developed for the depth filter to obtain the transient concentration gradient across the filter medium thickness. The model was then combined with the theoretical breakthrough models to predict the adsorption column breakthrough curves. Results revealed that a decrease in the feed flowrate and filter pore size could intensify the concentration polarization on the filter surface. Both model extensions could successfully approximate the breakthrough curves of the hybrid system with more than 99% agreement with the experimental data, while the prediction accuracy of the original breakthrough models seldom exceeds 93%.

中文翻译：

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吸附柱突破曲线建模的新组合扩展 - 深度过滤混合工艺

摘要 这项工作为吸附柱/深层过滤混合系统的突破曲线建模引入了新的场景。四个著名的理论突破模型，包括 Thomas、Adams-Bohart、Yoon-Nelson 和 BDST，被用来描述归一化浓度曲线。在第一种方法中，结合理论模型以更好地估计突破曲线，获得 Thomas/Yoon-Nelson 和 Thomas/BDST 组合作为最佳扩展。在第二种方法中，为深层过滤器开发了吸附-传输模型，以获得跨过滤介质厚度的瞬态浓度梯度。然后将该模型与理论突破模型结合以预测吸附塔突破曲线。结果表明，进料流速和过滤器孔径的减小会加剧过滤器表面的浓差极化。两种模型扩展都可以成功逼近混合系统的突破曲线，与实验数据的一致性超过99%，而原始突破模型的预测精度很少超过93%。