The reduction of hazardous nitric oxide emissions remains a significant ecological challenge. Despite the variety of possibilities, sorbents able to capture low concentrations of NO from flue gas with high selectivity are still in demand. In this work a new type of mesoporous xerogel material highly loaded with ultrastable Blatter radicals (BTR, >60 % by mass) that act as selective NO sorption sites is developed. Electron Paramagnetic Resonance (EPR) spectroscopy evidences reversible NO sorption in nanometer-scale pores of BTR-based xerogels and indicates the high NO capacity of such radical-rich sorbent. Efficient NO capture from model flue gas mixture is also evidenced in experiments with a fixed bed reactor. Such advanced properties of new materials as selectivity, strong binding with NO and an ability for mild regeneration via thermodesorption promote them for future ecological applications.

中文翻译：

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基于超稳定布拉特自由基的干凝胶介孔材料可有效吸附一氧化氮


减少有害一氧化氮的排放仍然是一个重大的生态挑战。尽管存在多种可能性，但仍然需要能够高选择性地从烟气中捕获低浓度 NO 的吸附剂。在这项工作中，开发了一种新型介孔干凝胶材料，该材料高度负载超稳定的 Blatter 自由基（BTR，质量％3E60％），可作为选择性 NO 吸附位点。电子顺磁共振 (EPR) 光谱证明了 BTR 基干凝胶纳米级孔中 NO 的可逆吸附，并表明这种富含自由基的吸附剂具有高 NO 容量。固定床反应器的实验也证明了模型烟气混合物中 NO 的有效捕获。新材料的选择性、与NO的强结合以及通过热解吸进行温和再生的能力等先进特性促进了它们在未来的生态应用中的应用。