Although FAU zeolites have been widely used as absorbents for volatile organic compounds (VOCs) removal, preparation of high-silica FAU zeolite to expand its application under high humidity is still a big challenge. Here, two high-silica FAU zeolites were successfully prepared through the controllable framework modulation strategy. By carefully matching the degrees of dealumination and Si-insertion, the zeolite (FAU-H) with an ultra-high SiO₂/Al₂O₃ ratio of 957 was obtained. FAU-H exhibited similar high adsorption capacities of VOCs (e.g. m-xylene and toluene) under dry and humid conditions, more importantly, its adsorption capacity of m-xylene was 25% higher than the industrial high-silica FAU zeolite (HSZ-390HUA) from Tosoh Corporation. When the dealumination degree was mismatched with that of Si-insertion, imperfect FAU-M (SiO₂/Al₂O₃ = 108) with the existence of some defect sites was obtained that becomes a good candidate for the adsorption removal of small VOCs molecules (e.g. isopropanol). The moderate interaction between VOCs and zeolite framework is proved a key factor for small molecules adsorption on basis of the DFT calculations. Moreover, the fitted kinetic models, desorption tests, and adsorption−desorption cycling tests proved the good regenerability of FAU-H and FAU-M. Therefore, the proposed high-silica FAU zeolites are promising adsorbents for VOCs removal.

尽管FAU沸石已被广泛用作去除挥发性有机化合物（VOCs）的吸收剂，但制备高硅FAU沸石以扩大其在高湿度下的应用仍然是一个很大的挑战。在这里，通过可控骨架调制策略成功制备了两种高硅 FAU 沸石。通过仔细匹配脱铝和 Si 插入的程度，沸石 (FAU-H) 具有超高 SiO ₂ /Al ₂ O ₃获得了 957 的比率。FAU-H在干湿条件下对VOCs（如间二甲苯和甲苯）表现出相似的高吸附能力，更重要的是，其对间二甲苯的吸附能力比工业高硅FAU沸石（HSZ-390HUA）高25% ) 来自东曹公司。当脱铝程度与硅插入程度不匹配时，不完善的FAU-M (SiO ₂ /Al ₂ O ₃ = 108) 获得了一些缺陷位点的存在，成为吸附去除小 VOCs 分子（例如异丙醇）的良好候选者。基于 DFT 计算，VOC 与沸石骨架之间适度的相互作用被证明是小分子吸附的关键因素。此外，拟合动力学模型、脱附试验和吸附-脱附循环试验证明了FAU-H和FAU-M具有良好的再生性。因此，所提出的高硅FAU沸石是很有前途的VOCs去除吸附剂。