铁钴共掺杂的Mn-Ce/TiO_2催化剂低温SCR脱硝  

Low-temperature SCR of NO over Fe and Co co-doped Mn-Ce/TiO_2 catalyst

作　　者：朱少文[1] 沈伯雄[2] 池桂龙 张笑[1] 

机构地区：[1]南开大学环境科学与工程学院,天津300350 [2]河北工业大学能源与环境工程学院,天津300401

出　　处：《环境工程学报》2017年第6期3633-3639,共7页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(51541602);河北省重点基金资助项目(E2016202361)

摘　　要：采用浸渍法制备了Fe和Co改性的Mn-Ce/TiO_2催化剂,研究了Fe和Co共同掺杂对催化剂脱硝及抗水抗硫性的影响。发现Fe和Co以1∶2摩尔比共同掺杂的催化剂具有最佳的脱硝活性。通过BET、XRD、XPS和FTIR等表征手段对其微观结构和抗毒性机理进行研究,发现Fe和Co的掺杂能明显提高催化剂的比表面积和孔隙率,增强催化剂的氧化还原性能。Fe和Co的引入还能减少硫酸根离子和水分子在催化剂表面的累积,从而增强催化剂的抗水抗硫性能。Fe and Co co-doped Mn-Ce/TiO2 catalysts prepared by impregnation method were investigated for low temperature SCR of NO with NH3. The activity experiment showed that the Fe and Co co-doped catalyst with a Fe/Co molar ratio of 1：2 achieved the highest NO conversion. The resistance to SO2 andH2O of the catalyst was also studied. The catalyst was characterized by BET, XRD, XPS and FTIR to discuss the property and mechanism of resistance to SO2 andH2O of the catalyst. The result indicated that BET surface area and porosity of the Mn-Ce/TiO2 catalyst was greatly improved after co-doping Fe and Co. The XPS result demonstrated that the redox state of the catalyst was well balanced by the introduction of Fe and Co. The result indicated that the co-doping of Fe and Co could inhibit the accumulation of sulfate and water molecule on the surface of the catalyst,as a result, enhance the catalysts resistance to SO2 andH2O.

关 键 词：低温SCR 铁钴 共掺杂 锰铈钛 催化剂 

分 类 号：X511[环境科学与工程—环境工程]