Activated carbon fibre (ACF) absorbent is a promising material for capturing volatile organic compounds from gas streams. Electrothermal swing adsorption (ESA) technology was proposed to achieve the regeneration of adsorption-saturated ACF materials. A numerical study on the adsorption and electrothermal desorption processes in ACF felt at the pore scale was conducted. A 3D pore-scale lattice Boltzmann model was used to describe the momentum/heat/mass transfers coupled with the adsorption/desorption effect. Using this model, a numerical simulation was performed to investigate the heat and mass behaviours of ESA in the pore structure of ACF felt, which was reconstructed using X-ray micro-tomography technology. The simulation results reveal the effects of key operation parameters on the process properties of ESA in the adsorption step and the electrothermal regeneration step. Moreover, the pore-scale study illustrates the influence of carrier gas velocity on the distribution homogeneity of the adsorbate concentration and desorption temperature.

活性碳纤维（ACF）吸收剂是一种用于捕获气流中挥发性有机化合物的有前途的材料。提出了电热摆动吸附（ESA）技术，以实现吸附饱和的ACF材料的再生。对ACF毛毡在孔尺度上的吸附和电热解吸过程进行了数值研究。使用3D孔尺度格子Boltzmann模型来描述动量/热/质量转移以及吸附/解吸效果。使用该模型，进行了数值模拟，以研究ESA在ACF毡的孔结构中的热和质量行为，并使用X射线显微断层扫描技术对其进行了重建。仿真结果揭示了关键操作参数对ESA在吸附步骤和电热再生步骤中的工艺特性的影响。此外，孔隙规模研究表明载气速度对吸附物浓度和解吸温度分布均匀性的影响。