Emissions from coal-fired or biomass power plants are often released under conditions of high-humidity, posing significant challenges to the effectiveness and durability of adsorbents and catalysts. In industrial settings, adsorbents and catalysts are often deactivated due to water presence, which can block active sites and reduce their effectiveness. Traditional hydrophobic modification methods often cover these adsorption sites, thus reducing a material’s adsorption capacity for volatile organic compounds (VOCs). In this study, we propose a mild physical blending method, incorporating hydrophobic polymer poly(divinylbenzene) (PDVB) with zeolite-templated carbon (ZTC), to regulate the local environment of ZTC for capturing VOCs under humid conditions without damaging the chemical structure of ZTC. Numerous characterization results confirm that incorporating PDVB does not affect the structure of ZTC. The hydrophobic modification increased the adsorption capacity of ZTC by 205% at 15% water content, while the water contact angle increased from 48 to 138°. Vinyl and phenyl groups in PDVB facilitated the rapid repulsion of water molecules from the surface. Molecular dynamics simulations indicated that the hydrophobic channels promoted the desorption of water molecules, and the number of escaped water molecules increased by 286%. Additionally, we propose an industrial application model for large-scale gas emissions with low-concentration VOCs under humid conditions, which enables simultaneous adsorption and desorption, thereby enhancing operational efficiency.

中文翻译：

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在沸石模板碳上构建疏水表面以增强高湿度煤烟气中 VOCs 去除的界面调制策略


燃煤或生物质发电厂的排放物通常在高湿度条件下释放，对吸附剂和催化剂的有效性和耐久性构成重大挑战。在工业环境中，吸附剂和催化剂通常会因水的存在而失活，这会堵塞活性位点并降低其有效性。传统的疏水改性方法通常覆盖这些吸附位点，从而降低了材料对挥发性有机化合物 （VOC） 的吸附能力。在这项研究中，我们提出了一种温和的物理混合方法，将疏水性聚合物聚（二乙烯基苯）（PDVB）与沸石模板碳 （ZTC） 结合，以调节 ZTC 的局部环境，以便在潮湿条件下捕获 VOCs，而不会破坏 ZTC 的化学结构。大量表征结果证实，掺入 PDVB 不会影响 ZTC 的结构。疏水改性在含水量为 15% 时使 ZTC 的吸附容量增加了 205%，同时水接触角从 48° 增加到 138°。PDVB 中的乙烯基和苯基促进了水分子从表面的快速排斥。分子动力学模拟表明，疏水通道促进了水分子的解吸，逸出的水分子数量增加了 286%。此外，我们提出了一种在潮湿条件下低浓度 VOCs 大规模气体排放的工业应用模型，该模型能够同时吸附和解吸，从而提高运营效率。