表面活性剂辅助V2O5-WO3/TiO2失活催化剂再生及其脱硝性能研究
马苠嘉 , 董程 , 高珊 , 王兵 , 韩丽娜 , 张志华 , 秦红伟 , 张清海 , 王建成
现代化工 ›› 2025, Vol. 45 ›› Issue (9) : 125 -132.
表面活性剂辅助V2O5-WO3/TiO2失活催化剂再生及其脱硝性能研究
Surfactant-assisted regeneration of deactivated V2O5-WO3/TiO2 catalyst and study on denitrification performance of regenerated catalyst
针对燃煤电厂V2O5-WO3/TiO2脱硝催化剂因硫酸氢铵、飞灰沉积及碱金属中毒而失活,研究了其再生方法。在清洗失活催化剂后,于含钒浸渍液中添加表面活性剂(CTAB、TEP-90、SEA-10)以改善钒负载。其中,添加0.04% CTAB效果最佳,使再生催化剂脱硝活性提升约10%,在350℃下NO转化率达95%。CTAB与溶液中V5+及催化剂载体相互作用最强,使催化剂钒含量增至4.475 mg/L,显著提高了活性组分中V5+比例及表面活性氧含量,增强了低温可还原性,从而提升脱硝性能。
In the light of the deactivation of V2O5-WO3/TiO2 DeNOx catalysts in coal-fired power plants caused by ammonium bisulfate deposition,fly ash accumulation,and alkali metal poisoning,this study explores a regeneration method.The deactivated catalyst is washed and then impregnated with a vanadium-containing solution modified with different surfactant (CTAB,TEP-90,SEA-10) to enhance vanadium loading.The addition of 0.04% CTAB yields the optimal results,improving the DeNOx activity of regenerated catalyst by approximately 10% and achieving a NO conversion rate of 95% at 350℃.CTAB exhibits the strongest interaction with V5+ ions in the solution and the support of the catalyst,increasing the vanadium content in the catalyst to 4.475 mg/L.This elevates significantly the proportion of V5+ species within the active components and the content of surface active oxygen in the catalyst while enhancing the catalyst’s low-temperature reducibility,thereby boosting DeNOx performance.
氮氧化物脱除 / 表面活性剂 / 再生 / 失活 / 选择性催化还原
nitrogen oxides removal / surfactant / regeneration / deactivation / selective catalytic reduction
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山西省重点研发项目(202202090301012)
山西省科技创新人才团队(202204051002025)
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