摘要
采用浸渍法制备了MnO_x掺杂的CeO_2/AC催化剂,考察了MnO_x的掺杂对催化剂的低温NH_3选择性催化还原NO_x的性能的影响,并采用了XRD、NH_3-TPD、H_2-TPR对催化剂进行了表征。结果表明,MnO_x的掺杂提高了催化剂的表面酸性和氧化还原性能,从而使催化剂在110℃以下的活性得以提升,但催化剂在120℃以上的活性则随着MnO_x的掺杂量的增加而降低。与其他催化剂相比,Ce/Mn比为4∶1的催化剂在整个温度区间都具有较好的活性,而且该催化剂在210℃下具有较好的抗SO_2中毒能力。
CeO 2/AC catalyst doped with MnO x was prepared by impregnation method. The in uence of MnO x doping on NH 3 selective catalytic reduction of NO x at low temperature was investigated. X-ray diffraction （XRD）, NH 3 temperature programmed desorption （NH 3-TPD） and H 2-temperature programmed reduction （H 2-TPR） were used to evaluate structure and performance of catalyst. The result showed that MnO x doping improved the surface acidity and redox property of the catalysts, which enhanced the catalytic activity lower than 110 ℃. But the catalytic activity higher than 120 ℃ decreased with the increasing doping content of MnO x . The catalyst with m （Ce）/ m （Mn） ratio of 4∶1 shows better activity than the other catalyst in the whole temperature range. It also behaved excellent sulfur resistance performance at 210 ℃.
作者
黄利华
李雪
HUANG Lihua;LI Xue(Institute of Environment and Resource,Southwest University of Science and Technology,Mianyang 621010,China)
出处
《功能材料》
EI
CAS
CSCD
北大核心
2018年第6期124-128,共5页
Journal of Functional Materials
基金
四川省教育厅资助项目(17zd1145)
