SCR performance enhancement of NiMnTi mixed oxides catalysts by regulating assembling methods of LDHs‐Based precursor
Yali Du, Jiangning Liu, Xiaojian Li, Lili Liu, Xu Wu
Abstract
A series of NiMnTi mixed metal oxides (Ni/Mn‐TiO 2 , Mn/NiTi‐LDO and TiO 2 /NiMn‐LDO, NiMnTi‐LDO) were synthesized via different assembling methods and evaluated in the selective catalytic reduction of NO x with NH 3 (NH 3 ‐SCR). As the results presented, catalysts via diverse assembling methods of LDHs templates afforded different catalytic denitrification (DeNO x ) performance, which might be related to the exposure degree of active constituents and the interaction intensity between metal components. Noticeably, compared with Ni/Mn‐TiO 2 , Mn/NiTi‐LDO and TiO 2 /NiMn‐LDO catalysts, the NiMnTi‐LDO catalyst deriving from one step in‐situ method NiMnTi‐LDH precursor template exhibited the most desirable performance at temperature window of 150–360 °C in NH 3 ‐SCR (above 90% NO x conversion with 95% N 2 selectivity). The specific structure and property of samples were correlated by means of a series of characterizations, where the results indicated that NiMnTi‐LDO possessed the highest surface area, the strongest redox ability, the most abundant acid amount and the best dispersion.