Volatile organic compounds (VOCs) emitted from electronic industry may pose severe problems to human health and the environment. In the present study, the VOCs adsorption on commercial activated carbon fibers (ACFs) in a fixed-bed column was investigated by continuous mode as a function of inlet flow rate (100–500 L/h), inlet VOCs concentration (200–400 mg/m³), adsorption temperature (15–35 °C) and bed height (120–240 mm). Afterwards, the adsorption behavior and mechanism of VOCs on ACFs were quantified by the adsorption kinetic, equilibrium, thermodynamic models. To further quantify the adsorption performance in the fixed bed column, an axial dispersion model was proposed to model the breakthrough curves. The results indicated that the adsorption process conformed to the Langmuir isotherm and pseudo-first-order kinetic equation, indicative of physical adsorption. Moreover, the adsorption capacity increased with the increase of VOCs concentration and bed height, but decreased with the increase of inlet flow rate and adsorption temperature. Interestingly, the axial dispersion model can well predict the breakthrough curve and visualize the temporal and axial distribution of VOCs adsorption in the fixed-bed column by integrating Matlab ode15s solver with lsqcurvefit function, from which both the overall mass transfer and axial dispersion coefficient were also derived. The model herein may facilitate the process design of VOCs adsorption and precisely predict the adsorption performance of a scaled-up adsorption fixed bed.

电子工业排放的挥发性有机化合物 (VOC) 可能对人类健康和环境造成严重问题。在本研究中，通过连续模式研究了固定床柱中商用活性炭纤维 (ACF) 对 VOC 的吸附与入口流速 (100–500 L/h)、入口 VOC 浓度 (200–400毫克/米³)、吸附温度 (15–35 °C) 和床高 (120–240 mm)。然后，通过吸附动力学、平衡、热力学模型量化了 VOCs 在 ACFs 上的吸附行为和机理。为了进一步量化固定床塔中的吸附性能，提出了一种轴向分散模型来模拟穿透曲线。结果表明吸附过程符合Langmuir等温线和准一级动力学方程，表明为物理吸附。此外，吸附容量随着VOCs浓度和床层高度的增加而增加，但随着入口流速和吸附温度的增加而下降。有趣的是，通过将Matlab ode15s求解器与lsqcurvefit函数相结合，轴向扩散模型可以很好地预测穿透曲线并可视化固定床柱中VOCs吸附的时间和轴向分布，并从中导出整体传质和轴向扩散系数。本文的模型可以促进VOCs吸附的工艺设计并精确预测放大吸附固定床的吸附性能。