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.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this paper, a series of Mn-Ce mixed-oxide catalysts supported on carbon nanotubes (CNTs) were prepared for the first time and used for the selective catalytic reduction of NO with NH 3.
66 citations
TL;DR: In this article, a new cerium oxide catalyst supported on HNO3-treated carbon nanotubes (TCNTs) was prepared for the first time and used for the selective catalytic reduction of NO with ammonia.
66 citations
TL;DR: In this article, the presence of O 2, SO 2, and H 2 O selective reduction of NO by hydrocarbon over various catalysts, especially, over copper ion-exchanged zeolite has been studied.
Abstract: In the presence of O 2 , SO 2 , and H 2 O selective reduction of NO by hydrocarbon over various catalysts, especially, over copper ion-exchanged zeolite has been studied. Simultaneous presence of O 2 and hydrocarbon such as ethene, propene, and propane with NO in the reactant gas resulted in the great enhancement of the catalytic activity for the removal of NO at low temperature (473–673 K). On the other hand, the addition of CO, H 2 , or CH 4 to the NO+O 2 system did not cause any selective reduction of NO. In the former selective reduction, the increment of concentration of hydrocarbon increased the conversion into N 2 and expanded the active temperature region. Addition of oxygen to reactant stream is necessary to achieve the selective reduction of NO, and with Cu-MFI zeolite the maximum activity was observed in the range of oxygen concentration of 0.8–2.0%. No deterioration in the catalytic activity was observed at 573 K even after 30 h of continuous service. When SO 2 or H 2 O was added to NO–O 2 +hydrocarbon gas stream, a certain decrement in the catalytic activity of Cu-MFI zeolites was observed. Within the present experiments, the activity was restored in its absence. Various metal ion-exchanged zeolites, metal loading alumina, and oxides have been screened as catalysts for the reaction and it was clarified that Cu-MFI zeolite catalysts are the most active at high SV region. The addition of copper to zeolites, alumina, and silica-alumina greatly enhanced the activities.
66 citations
TL;DR: In this article, the NO2-SCR reaction was studied by transient reaction analysis over a Fe-zeolite commercial catalyst and it was shown that surface nitrates are first formed by NO2 disproportionation, followed by their catalytic reduction to nitrogen by ammonia.
Abstract: The NO2-SCR reaction is studied by transient reaction analysis over a Fe-zeolite commercial catalyst. It is proposed that the NO2-SCR reaction occurs according to a mechanism wherein surface nitrates are first formed by NO2 disproportionation, followed by their catalytic reduction to nitrogen by ammonia.
66 citations
TL;DR: In this paper, a direct hydrothermal synthesis approach to Fe/ZSM-5 zeolites was developed by using a ferric complex, i.e., ethylenediaminetetraacetic acid ferric sodium (EDTA-FeNa), as both an iron source and a structure-directing agent.
66 citations