Adsorption has been used widely to remove indoor volatile organic compounds (VOCs). However, the large diffusion resistance inside traditional granular adsorbents renders a low VOC adsorption rate. This study proposes a modified method to achieve the rapid diffusion into the adsorbent during the initial adsorption period. A thin and flexible adsorption board with a layer of adsorbent coated on a heating film was prepared for in-situ adsorption and regeneration. Then, regular, vertical macro-channels through the adsorption board were fabricated by laser drilling to enhance mass transfer inside the board. Experimental results demonstrated that after modification, the penetration times for formaldehyde and xylene extended from 3.8 to 6.2 h, and from 62 to 99 h, respectively. The effective adsorption capacity of the modified board had increased by a multiple of two for formaldehyde and 1.8 for xylene. A mathematical model was developed and experimentally validated to evaluate the modification effect for more adsorbent-pollutant pairs. The results showed that the amplification of effective adsorption capacity was positively correlated with the Da/(K·De) parameter; this is the diffusion resistance ratio prior to and following the modification. A spectrogram of adsorbent–pollutant pairs was plotted to guide the modification. This simple macro-channel modification of the adsorption board may be used as an alternative design for adsorption applications in indoor air purification.

吸附已被广泛用于去除室内挥发性有机化合物（VOC）。但是，传统的颗粒状吸附剂内部的大扩散阻力使得其VOC吸附率较低。这项研究提出了一种改进的方法，以在初始吸附期间实现快速扩散到吸附剂中。准备了一块薄而柔软的吸附板，该吸附板在加热膜上覆盖了一层吸附剂，用于原位制备吸附和再生。然后，通过激光钻孔制造穿过吸附板的规则，垂直的大通道，以增强吸附板内部的质量传递。实验结果表明，改性后，甲醛和二甲苯的渗透时间分别从3.8小时延长至6.2小时和62小时延长至99小时。改性板的有效吸附容量对甲醛和对二甲苯的倍数增加了两倍。建立了数学模型并进行了实验验证，以评估对更多吸附剂-污染物对的改性效果。结果表明，有效吸附量的放大率与Da /（K·De）参数呈正相关。这是修改前后的扩散阻力比。绘制了吸附剂-污染物对的频谱图以指导修改。吸附板的这种简单的宏通道修改可以用作室内空气净化中吸附应用的替代设计。