Sun Shaoqing, Vikrant Kumar, Verma Swati, Boukhvalov Danil W, Kim Ki-Hyun
Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seoul 04763, Republic of Korea.
College of Science, Institute of Materials Physics and Chemistry, Nanjing Forestry University, Nanjing 210037, China; Institute of Physics and Technology, Ural Federal University, Mira Street 19, 620002 Yekaterinburg, Russia.
J Colloid Interface Sci. 2024 Jan;653(Pt B):992-1005. doi: 10.1016/j.jcis.2023.09.159. Epub 2023 Sep 27.
It is of significant practical interest to develop high-performance air purifier (AP) for removing carcinogenic volatile organic compounds present ubiquitously in indoor air (e.g., formaldehyde (FA)). In this regard, a portable AP system was designed by loading honeycomb ceramic filters with diaminopropane (DAP)-appended activated carbon (AC). The maximum removal efficiencies (REs) of AP loaded with 10, 20, 30, and 50 %-DAP/AC were 26.2, 28, 88.3, and 89.4 %, respectively, against 5 ppm FA (at 160 L min). Hence, the 30 % DAP unit was used mainly in this work. The removal efficiency of 30 %-DAP/AC (160 L min), when tested against 2 ppm FA, decreased from 90.3 to 73.2 % with an increase in relative humidity from 0 to 60 %. The performance of the AP unit, when assessed kinetically in terms of the clean air delivery rate (CADR), reached as high as 10.2 L min at the flow rate of 160 L min. Isotherm analysis further demonstrated the complex multilayered adsorption behavior of FA. Based on the density functional theory (DFT) simulation, the superiority of DAP/AC for FA adsorption can be attributed to the synergy of covalent (chemisorption) and non-covalent (pore filling and film diffusion) interactions.
开发高性能空气净化器（AP）以去除室内空气中普遍存在的致癌挥发性有机化合物（如甲醛（FA））具有重大的实际意义。在这方面，通过在蜂窝陶瓷过滤器中加载二氨基丙烷（DAP）修饰的活性炭（AC）设计了一种便携式AP系统。负载10%、20%、30%和50% DAP/AC的AP对5 ppm FA（在160 L/min流量下）的最大去除效率（REs）分别为26.2%、28%、88.3%和89.4%。因此，本工作主要使用30% DAP单元。当针对2 ppm FA进行测试时，30% DAP/AC（160 L/min）在相对湿度从0增加到60%时，去除效率从90.3%降至73.2%。当根据洁净空气输送率（CADR）进行动力学评估时，AP单元在160 L/min的流量下性能高达10.2 L/min。等温线分析进一步证明了FA复杂的多层吸附行为。基于密度泛函理论（DFT）模拟，DAP/AC对FA吸附的优势可归因于共价（化学吸附）和非共价（孔填充和膜扩散）相互作用的协同作用。
