NbTi-modified amorphous CeMnOx catalysts for low temperature removal of NO and suppression of N2O formation
NbTi-modified amorphous CeMnOx catalysts for low temperature removal of NO and suppression of N2O formation
研究概述
利用Nb/Ti改性非晶CeMn氧化物，将表面酸性位点与氧化还原位点有效耦合，在低温NH3-SCR脱硝中兼顾NO转化及N2O抑制。适当Nb形成Brønsted酸位，促进两类反应机制并存；Nb10%Ti15%–CeMn的90% NO转化温区为120–313 ℃，250 ℃时N2选择性约80%。
谱图与表征信息
Figure 2. (a) XRD patterns of the prepared catalysts: (1) Nb2O5, (2) CeMn, (3) Ti15%-CeMn, (4) Nb1%Ti15%-CeMn, (5) Nb5%Ti15%-CeMn, (6) Nb10%Ti15%-CeMn, (7) Nb20%Ti15%-CeMn, (8) CeMn- 750. (b) EXAFS spectra of CeMn and references at R space of Mn K-edge. (1) Mn foil, (2) MnO2, (3) CeMn.