Abstract A series of Cu-Fe catalysts with fixed metal content and variable ratios of ZSM-5 and CNTs were used to investigate NO removal in a plasma-catalyst system at low temperature. The catalysts were characterized by BET, XRD, TGA, XPS, H 2 -TPR and NH 3 -TPD. The results showed that the catalyst promoted the NO conversion rate from only plasma system, and 1Z3C catalyst exhibited the best NO conversion rate of 86.1% at 191.5 J/L. Composite support promoted the catalytic activity at low temperature, and greatly improved the Cu 2+ and Fe 3+ concentration on the 1Z3C catalyst, both Cu 2+ and Fe 3+ contributed greatly to catalytic reaction of NO conversion. Chemisorbed oxygen also acted as activated sites for NO conversion. When the input energy was 75 J/L, the NO conversion rate decreased from 70% to 41% with adding 500 ppm SO 2 , which decreased with increasing SO 2 concentration, while generation rate of SO 3 was less than 0.2% in the combination system. In the presence of SO 2 , copper sulfate species, ferric sulfate species and ammonium sulfates generated on the surface of catalyst, which consumed Lewis acid sites and blocked the active sites, decreasing NO conversion rate.

中文翻译：

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ZSM-5和碳纳米管负载的Cu-Fe催化剂在低温下等离子体辅助催化转化NO

摘要 一系列具有固定金属含量和可变 ZSM-5 与 CNT 比例的 Cu-Fe 催化剂被用于研究低温等离子体-催化剂体系中的 NO 去除。通过BET、XRD、TGA、XPS、H 2 -TPR和NH 3 -TPD对催化剂进行表征。结果表明，该催化剂仅通过等离子体系统促进了NO转化率，1Z3C催化剂在191.5 J/L时表现出最佳的NO转化率，为86.1%。复合载体提高了低温催化活性，大大提高了1Z3C催化剂上的Cu 2+ 和Fe 3+ 浓度，Cu 2+ 和Fe 3+ 都对NO转化的催化反应做出了很大贡献。化学吸附的氧也作为 NO 转化的活化位点。当输入能量为 75 J/L 时，加入 500 ppm SO 2 后，NO 转化率从 70% 下降到 41%，随SO 2 浓度的增加而降低，而组合系统中SO 3 的生成率小于0.2%。在SO 2 存在下，催化剂表面生成硫酸铜物种、硫酸铁物种和硫酸铵，消耗路易斯酸位点并阻断活性位点，降低NO转化率。