摘要
以活性炭为载体,采用浸渍法制备了一系列Fe掺杂Mn-Ce/AC催化剂,研究了Fe的添加量、焙烧温度对催化剂低温脱硝活性的影响;采用了XRD、SEM和N2吸附-脱附技术对催化剂进行了表征。结果表明,Fe的添加能有效提高Mn-Ce/AC的低温脱硝活性,当Fe的添加量为Fe/Mn(摩尔比)为0.1时,催化剂比表面积大,活性组分的分散程度较高,催化剂低温脱硝性能最优,添加量大于0.1时,更多的Fe沉积在载体表面,催化剂活性降低。焙烧温度影响负载氧化物的价态和晶体的分散度,在400℃温度下焙烧时,催化剂低温脱硝性能最佳,此时催化剂孔隙结构较优,活性组分的分散程度也较高。
Fe-doped Mn-Ce / AC catalysts were prepared via a wet impregnation method and characterized through N2adsorption-desorption,X-ray diffraction,and scanning electron microscopy. The effects of the amount of Fe added and calcination temperature were studied. The NO removal activity of the Mn-Ce / AC catalyst increased clearly after the addition of Fe. When the amount of Fe added was 0. 1（ molar ratio between Mn and Fe）,the catalyst exhibited the highest NO reduction activity,with a high surface area and widely dispersed active components. The catalytic activity of the samples decreased when the Fe loading was greater than 0. 1. The calcination temperature influenced the valence of the oxides and the dispersion of crystals,and the optimal catalyst calcination temperature was 400 ℃,because the catalyst calcined at 400 ℃ had a superior pore structure and the active components showed better dispersion on the carbon surface.
出处
《环境工程学报》
CAS
CSCD
北大核心
2017年第1期445-449,共5页
Chinese Journal of Environmental Engineering
基金
国家自然科学基金资助项目(51378325)
四川省科技厅项目(2013ZZ0005)
