Journal ArticleDOI
Selective catalytic reduction of NO and NO2 at low temperatures
TLDR
In this paper, the authors investigated the effect of ammonium nitrate on the SCR reaction in the presence of NO and showed that ammonium Nitrate can lead to the formation of NO 2.About:
This article is published in Catalysis Today.The article was published on 2002-04-15. It has received 369 citations till now. The article focuses on the topics: Selective catalytic reduction & Ammonia.read more
Citations
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Journal ArticleDOI
Effect of manganese substitution on the structure and activity of iron titanate catalyst for the selective catalytic reduction of NO with NH3
TL;DR: In this article, the selective catalytic reduction (SCR) of NO with NH3 over manganese substituted iron titanate catalysts was investigated and the Mn substitution amounts showed obvious influence on the catalyst structure, redox behavior and NH3/NOx adsorption ability of the catalysts.
Journal ArticleDOI
Strontium-doped perovskites rival platinum catalysts for treating NOx in simulated diesel exhaust.
TL;DR: It is shown that a strontium-doped perovskite catalyst, prepared from more abundant (and cheaper) elements, may help to lower the cost of NOx treatments and thus ultimately make diesel a more cost-effective automotive fuel.
Journal ArticleDOI
The chemistry of the NO/NO2–NH3 “fast” SCR reaction over Fe-ZSM5 investigated by transient reaction analysis
TL;DR: In this article, the authors present a systematic study of the chemical steps in the NO/NO2−NH3 fast SCR reaction 2NH3+NO+NO2 → 2N2+3H2O over a commercial Fe-ZSM5 catalyst.
Journal ArticleDOI
Diesel Oxidation Catalysts
April Russell,William S. Epling +1 more
TL;DR: The diesel oxidation catalyst (DOC) has been part of diesel exhaust systems since regulations were introduced to limit the amount of harmful emissions released to the environment from diesel engines as discussed by the authors, while active hydrocarbon oxidation can also be used to generate exotherms required for downstream components.
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Reactivity of NO/NO2–NH3 SCR system for diesel exhaust aftertreatment: Identification of the reaction network as a function of temperature and NO2 feed content
Cristian Ciardelli,Isabella Nova,Enrico Tronconi,Daniel Chatterjee,Brigitte Bandl-Konrad,Michel Weibel,Bernd Krutzsch +6 more
TL;DR: In this article, the NH3-SCR reactivity over a commercial V2O5-WO3/TiO2 catalyst in a wide range of temperatures and NO/NO2 feed ratios was investigated.
References
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Journal ArticleDOI
Urea-SCR: a promising technique to reduce NOx emissions from automotive diesel engines
TL;DR: In this article, the authors discuss the fundamental problems and challenges if urea-SCR is extended to mobile applications, including the control strategy for urea dosing, the high freezing point of urea, and the long term stability of the catalyst.
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Reaction Pathways in the Selective Catalytic Reduction Process with NO and NO2 at Low Temperatures
TL;DR: The low-temperature behavior of the selective catalytic reduction (SCR) process with feed gases containing both NO and NO2 was investigated in this article, where the two main reactions are 4NH3 + 2NO + 2 NO2 → 4N2 + 6H2O and 2NH3+ 2NO2 → NH4NO3 + N2 + H2O.
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NOx storage in barium-containing catalysts
TL;DR: In this paper, the effect of key parameters on the characteristics of barium oxide-based NOxstorage catalysts was systematically investigated, and the influence of temperature, storage and regeneration times, NOxsource (NO or NO2), oxygen concentration, reducing agent (C3H6, C3H8, CO, or H2), and carbon dioxide concentration on NOx storage capacity was studied.
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Hydrolysis of Isocyanic Acid on SCR Catalysts
TL;DR: In this article, the authors compared the first-order rate constants of HNCO hydrolysis with the SCR reaction using the integral equation for a plug-flow reactor.