Simplifing the preparation process is an efficient method to reduce process energy consumption and product costs. In this work, a one-step vacuum impregnation technology was developed for the preparation of VO-WO/TiO catalyst modified SiC (VWTi/SiC) catalytic membranes. In comparison to VWTi/SiC (II) catalytic membrane prepared by the traditional two-step method, the VWTi/SiC (I-X) catalytic membrane prepared via one-step vacuum impregnation technology demonstrate significant advantages in terms of energy saving and consumption reduction. Owing to the strongest activation ability for O and NH induced by high V species and strong V-W interaction, the optimal VWTi/SiC (I-500) can achieve 90 % ammonia selective catalytic reduction (NH-SCR) denitrition efficiency at the temperature range from 200 °C to 350 °C, presenting a much higher NH-SCR activity than VWTi/SiC (II-500). The evaluation of sulfur resistance, long-term stability and dust filtration performance proposed that VWTi/SiC (I-500) demonstrated excellent sulfur resistance and outstanding long-term stability and excellent dust filtration performance (particle interception rate exceeds 99.9 % for typical 2.5 μm silicon dioxide particles) at various condition. Therefore, the VWTi/SiC catalytic membrane prepared by one-step vacuum impregnation method holds great promise and development potential for high-temperature flue gas purification.

中文翻译：

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简单制备高效除尘、还原NO的V2O5-WO3/TiO2/SiC催化膜


简化制备工艺是降低工艺能耗和产品成本的有效方法。本工作开发了一种一步真空浸渍技术用于制备 VO-WO/TiO 催化剂改性 SiC (VWTi/SiC) 催化膜。与传统两步法制备的VWTi/SiC(II)催化膜相比，一步真空浸渍技术制备的VWTi/SiC(I-X)催化膜在节能降耗方面表现出显着的优势。由于高 V 物质和强 V-W 相互作用对 O 和 NH 具有最强的活化能力，最佳 VWTi/SiC (I-500) 可在以下温度范围内实现 90% 的氨选择性催化还原 (NH-SCR) 脱硝效率： 200 °C 至 350 °C，呈现出比 VWTi/SiC (II-500) 高得多的 NH-SCR 活性。抗硫性、长期稳定性和粉尘过滤性能的评估表明，VWTi/SiC（I-500）表现出优异的抗硫性和突出的长期稳定性以及优异的粉尘过滤性能（对于典型的2.5μm颗粒拦截率超过99.9%）二氧化硅颗粒）在不同条件下。因此，一步真空浸渍法制备的VWTi/SiC催化膜在高温烟气净化方面具有广阔的应用前景和发展潜力。