Topic
Selective catalytic reduction
About: Selective catalytic reduction is a research topic. Over the lifetime, 10502 publications have been published within this topic receiving 226291 citations.
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TL;DR: In this article, the selective catalytic oxidation of ammonia to nitrogen (NH 3 -SCO) has been studied over hydrotalcite derived mixed metal oxides containing Cu, Co, Fe or Ni.
Abstract: The selective catalytic oxidation of ammonia to nitrogen (NH 3 -SCO) has been studied over hydrotalcite derived mixed metal oxides containing Cu, Co, Fe or Ni. XRD, BET, NH 3 -TPD and TPR techniques were used for catalysts characterization. Results of NH 3 -SCO were compared with those of selective catalytic reduction of NO with NH 3 (NO-SCR). Reaction mechanism was studied by temperature-programmed surface reaction (TPSR) and activity tests with a various contact time. Catalytic performance of the studied samples depends on both kind and loading of transition metals in the mixed metal oxide system. The Cu-containing samples have been found to be the most active catalysts of the NH 3 -SCO process. Transition metal loading strongly influences distribution of ammonia oxidation products. The highest selectivity to N 2 was measured for the catalysts with the lowest transition metal content.
103 citations
TL;DR: In this article, the effect of SO 2 on the V 2 O 5 /AC catalyst for the NO reduction with NH 3 at low temperatures (150-250°C) was studied using a transient method.
103 citations
TL;DR: Variations of the terphenyl substituents in the triamidoamine ligand demonstrate that the original ligand is not unique in its ability to yield successful catalysts, but complexes that contain sterically less demanding ligands fail to catalyze formation of ammonia from dinitrogen.
Abstract: Since our discovery of the catalytic reduction of dinitrogen to ammonia at a single molybdenum center, we have embarked on a variety of studies designed to further understand this complex reaction cycle. These include studies of both individual reaction steps and of ligand variations. An important step in the reaction sequence is exchange of ammonia for dinitrogen in neutral molybdenum(III) compounds. We have found that this exchange reaction is first order in dinitrogen and relatively fast (complete in <1 h) at 1 atm of dinitrogen. Variations of the terphenyl substituents in the triamidoamine ligand demonstrate that the original ligand is not unique in its ability to yield successful catalysts. However, complexes that contain sterically less demanding ligands fail to catalyze formation of ammonia from dinitrogen; it is proposed as a consequence of a base-catalyzed decomposition of a diazenido (MoNNH) intermediate.
102 citations
TL;DR: In this paper, the reaction of nitromethane over Co-ZSM5 has been studied with the aim of establishing the paths by which it can be converted to N 2 under the conditions of the methane-SCR reaction over this type of catalyst.
102 citations
TL;DR: In this article, an environmentally benign Fe-Ce-Ti mixed oxide catalyst was investigated for the selective catalytic reduction of NOx with NH3 (NH3-SCR), which exhibited high N2 selectivity and strong resistance against H2O and SO2 with a wide operation temperature window.
102 citations