Low-Temperature SCR of NO with NH_3 on Mn-Based Catalysts Modified with Cerium  

作　　者：唐晓龙 郝吉明 易红宏 宁平 

机构地区：[1]Faculty of Environmental Science & Engineering, Kunming University of Science & Technology [2]Department of Environmental Science & Engineering, Tsinghua University

出　　处：《Journal of Rare Earths》2007年第S1期240-243,共4页稀土学报（英文版）

基　　金：the Key Project of the National Natural Science Foundation of China (20437010);the Natural Science Foundation of Yunnan Province (2007E184M);the Science Foundation of the Education Department of Yunnan Province(07C11400)

摘　　要：A series of Mn-based catalysts, MnOx, MnOx-CeO, Pd-Mn-Ce, MnOx/AC were prepared. And their performances for NO low-temperature SCR were investigated in this study. The NO conversion is about 90% at 100 ℃ on MnOx-CeOand almost all NO can be converted at 120 ℃. Similar results are also observed in the tests on MnOx-CeO/AC. The excellent low-temperature catalytic activity of modified Mn-based catalysts, which may be mainly due to the oxygen storage function of CeO, can improve the oxygen flow on the catalysts surface. Then the oxidation of NO to NO2 is accelerated, which is the key step of NO SCR.A series of Mn-based catalysts, MnOx, MnOx-CeO_2, Pd-Mn-Ce, MnOx/AC were prepared. And their performances for NO low-temperature SCR were investigated in this study. The NO conversion is about 90% at 100 ℃ on MnOx-CeO_2 and almost all NO can be converted at 120 ℃. Similar results are also observed in the tests on MnOx-CeO_2/AC. The excellent low-temperature catalytic activity of modified Mn-based catalysts, which may be mainly due to the oxygen storage function of CeO_2, can improve the oxygen flow on the catalysts surface. Then the oxidation of NO to NO2 is accelerated, which is the key step of NO SCR.

关 键 词：LOW-TEMPERATURE selective catalytic reduction (SCR) NO CERIUM rare earths 

分 类 号：O643.36[理学—物理化学]