Experimental and modeling investigations on the adsorption behaviors of indoor volatile organic compounds in an in-situ thermally regenerated adsorption-board module

摘要

In-situ thermally regenerated adsorption is superior for the long-term purification of indoor VOCs. In this study, a concrete mathematical model has been built to predict adsorption behaviors in various practical situations. Parametric analyses, including the influences of adsorption kinetic parameters, face velocity, and geometric parameters, were then conducted to optimize the material coating, improve the module's structure, and predict long-term performance. Experiments were conducted on the board prepared with activated carbon. Results show that the predicted adsorption - regeneration behaviors of the adsorption-board module fit well with the experimental data within an error of 10%. Furthermore, the energy consumption of the adsorption board module was compared with that of the conventional packed-bed module. For formaldehyde and xylene, the heating energy consumption per unit of the dimensionless effective purification volume was reduced by 50.7% and 39.6%, respectively. The model provided a technical incentive for indoor VOC purification by selecting adsorbents and designing in-situ thermally regenerated adsorption modules.