论文部分内容阅读
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。
A series of Fe-doped Mn-Ce / AC catalysts were prepared by impregnation method using activated carbon as support. The effects of Fe addition amount and calcination temperature on the activity of catalyst were studied. XRD, SEM and N2 adsorption-desorption The catalyst was characterized by technology. The results show that the addition of Fe can effectively improve the low-temperature denitrification activity of Mn-Ce / AC. When the Fe content is 0.1, the specific surface area of the catalyst is large and the dispersion degree of the active component is high. The catalyst has the best denitration performance at low temperature. When the content is more than 0.1, more Fe is deposited on the surface of the support, and the activity of the catalyst is decreased. The calcination temperature affects the valence of the supported oxide and the degree of dispersion of the crystal. When calcined at 400 ° C, the catalyst has the best denitration performance at low temperature. At this time, the pore structure of the catalyst is better and the dispersion degree of the active component is higher.