1% Cu–1% Fe/TiO₂ was selected as the optimal catalyst for simultaneous removal of NO and SO₂ with vaporized H₂O₂. The effects of temperature, the molar ratio of H₂O₂ and NO, gas hourly space velocity (GHSV), and SO₂ concentration on simultaneous removal efficiency were investigated. Besides, a 24 h stability test was conducted on the 1% Cu–1% Fe/TiO₂ and 2% Fe/TiO₂. The results showed that the excellent removal efficiency of 93.9% for NO_x and 100% for SO₂ was obtained under the optimal conditions. Moreover, 1% Cu–1% Fe/TiO₂ presented excellent sulfur-resistant stability. Furthermore, the fresh and spent catalysts were characterized by SO₂-TPD, XRD, EPR, TEM, EDS, XPS, and FTIR. It was found that the generation of sulfate species on the catalysts would lead to the decrease of surface oxygen vacancies, resulting in the reduction of NO_x removal. Additionally, the mechanism of Cu doping on catalytic performance was discussed. The introduction of Cu could improve the activity of the catalyst by the increase of surface oxygen vacancies and inhibit the formation of sulfates to improve the sulfur resistance of catalysts.

中文翻译：

---

使用汽化 H2O2 在 Cu-Fe/TiO2 催化剂上同时去除 SO2 和 NO 的研究：SO2 效应分析

选择 1% Cu–1% Fe/TiO ₂作为同时去除 NO 和 SO ₂和汽化 H ₂ O ₂的最佳催化剂。研究了温度、H ₂ O ₂与NO的摩尔比、气时空速(GHSV) 和SO ₂浓度对同时去除效率的影响。此外，还对 1% Cu–1% Fe/TiO ₂和 2% Fe/TiO ₂进行了 24 小时稳定性测试。结果表明，在最佳条件下，NO _x去除率为93.9 %，SO ₂去除率为100% 。此外，1% Cu–1% Fe/TiO ₂表现出优异的抗硫稳定性。此外，新鲜和废催化剂通过 SO ₂ -TPD、XRD、EPR、TEM、EDS、XPS 和 FTIR 进行表征。发现催化剂上硫酸盐物种的产生会导致表面氧空位的减少，导致NO _x去除的减少。此外，还讨论了Cu掺杂对催化性能的影响机制。Cu的引入可以通过增加表面氧空位来提高催化剂的活性，抑制硫酸盐的形成，从而提高催化剂的耐硫性。