The potential of titanium oxynitride doped with 5% zinc (ZnTON) as an adsorbent is investigated using a fixed-bed adsorption system for the removal of gaseous formaldehyde (FA: at a partial pressure of 10 Pa). ZnTON outperformed two reference materials (i.e., commercial P25-TiO₂ and activated carbon (AC)) in terms of adsorption capacity at 10%/100% breakthrough (BT) levels in dry gas by factors of 1.7/1.3 and 10/2.5, respectively. The affinity of FA by ZnTON decreased with the increase in its initial feeding concentration (5 to 10 Pa) and temperature (25-100 ^oC). An increase in moisture level (0 to 100% relative humidity) led to 5.4- and 2.5-fold reductions in adsorption capacity at the two BT levels, respectively. Also, FA adsorption capacity was lowered with the increasing dose of ZnTOn. Adsorption of FA was limited by surface interactions and monolayer surface coverage by FA molecules, as its adsorption obeyed the Langmuir isotherm and pseudo-second-order kinetic models. Regeneration tests indicated a positive effect of moisture in FA desorption and the durability of ZnTON (e.g., over three adsorption-desorption cycles). This study offers valuable mechanistic insights into the synthesis of an advanced adsorbent for the efficient removal of hazardous volatile organic compounds under near-ambient temperatures and pressures.

使用固定床吸附系统研究了掺杂 5% 锌的氮氧化钛 (ZnTON) 作为吸附剂的潜力，用于去除气态甲醛（FA：分压为 10 Pa） 。ZnTON 在干燥气体中 10%/100% 穿透 (BT) 水平的吸附容量方面优于两种参考材料（即商业 P25-TiO ₂和活性炭 (AC)）1.7/1.3 和 10/2.5，分别。ZnTON 对 FA 的亲和力随着其初始进料浓度（5 至 10  Pa）和温度（25-100 ^o C）。湿度水平（0 到 100% 相对湿度）的增加导致两个 BT 水平的吸附能力分别降低 5.4 倍和 2.5 倍。此外，FA 吸附容量随着 ZnTOn 剂量的增加而降低。FA 的吸附受到表面相互作用和 FA 分子单层表面覆盖的限制，因为它的吸附服从 Langmuir 等温线和伪二级动力学模型。再生测试表明水分对 FA 解吸和 ZnTON 的耐久性有积极影响（例如，超过三个吸附-解吸循环）。这项研究为高级吸附剂的合成提供了宝贵的机理见解，可在接近环境的温度和压力下有效去除有害挥发性有机化合物。