The effective elimination of multiple pollutants (e.g., SO, NO, VOCs, dusts) in a simple unit is a long-term goal in the field of flue gas purification. In this work, the simultaneous removal of NO and toluene was explored over the industrial VO-MoO/TiO catalytic filter. The catalytic evaluations show that two reactions may share the same type of active sites, and observed adverse interaction effects at low temperatures, which significantly weakened as the temperature increased. Water vapor plays an amazing role with almost 100% removal efficiency of both NO and VOCs for long-term test under harsh conditions at 350 ℃. Multiple structural characterizations confirmed the great structure stability. Especially, the catalyst components can be sulfated by SO and become more dispersed and uniform owing to the formation of solid solution phase, which further improves the removal performance. Moreover, the mechanism over the dynamically balanced V-SO sites was proposed, and the main reaction pathway of toluene oxidation follows the route of benzaldehyde → benzoic acid → maleic anhydride → CO. Particularly, the DFIRTS results further confirm the above reaction/interaction effects and sulfur/steam-resistance mechanisms during the simultaneous removal of both NO and VOCs. The excellent sulfur/steam-resistance performance and special structure features of the industrial V-based catalytic filter foreshadow the promising industrial application prospect for the effective purification of flue gas containing VOCs.

中文翻译：

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通过工业 V 基催化过滤器同时消除 NOx 和 VOC：反应行为和催化剂结构演变

在一个简单的装置中有效消除多种污染物（例如SO、NO、VOC、粉尘​​）是烟气净化领域的长期目标。在这项工作中，探索了工业 VO-MoO/TiO 催化过滤器同时去除 NO 和甲苯的方法。催化评估表明，两个反应可能共享相同类型的活性位点，并在低温下观察到不利的相互作用效应，随着温度的升高，这种效应显着减弱。水蒸气发挥了惊人的作用，在350℃的恶劣条件下长期测试，NO和VOCs的去除效率几乎100%。多种结构表征证实了其良好的结构稳定性。特别是催化剂组分可以被SO硫酸化，并由于固溶相的形成而变得更加分散和均匀，进一步提高了去除性能。此外，提出了动态平衡V-SO位点的机理，甲苯氧化的主要反应路径遵循苯甲醛→苯甲酸→马来酸酐→CO的路线。特别是，DFIRTS结果进一步证实了上述反应/相互作用效应同时去除 NO 和 VOC 过程中的硫/蒸汽阻力机制。工业钒基催化过滤器优异的抗硫/蒸汽性能和特殊的结构特点预示着有效净化含VOCs烟气的良好工业应用前景。