Journal ArticleDOI
Low-Temperature Selective Catalytic Reduction of NO with NH3 over Ti0.9M0.1O2-δ (M = Cr, Mn, Fe, Co, Cu)
TLDR
In this article, a selective catalytic reduction (SCR) of NO with NH3 was investigated over these catalysts, and the reaction occurred at low temperature with a high selectivity over this catalyst.Abstract:
The catalysts, Ti0.9M0.1O2-δ (M = Cr, Mn, Fe, Co, Cu), were synthesized in anatase phase by solution combustion. Selective catalytic reduction (SCR) of NO with NH3 was investigated over these catalysts. The reaction occurred at the lowest temperature over Ti0.9Mn0.1O2-δ, but the selectivity for N2 was highest over Ti0.9Fe0.1O2-δ. Therefore, both Mn and Fe were substituted in TiO2 (Ti0.9Mn0.05Fe0.05O2-δ). The reaction occurred at low temperature with a high selectivity over this catalyst. In order to understand the reaction mechanism and the nature of the active sites, temperature programmed desorption (TPD) of NH3 and hydrogen uptake studies were carried out. The relation between the Lewis acid sites and SCR window and the relation between Bronsted acid sites and low temperature was established. The order of the SCR reaction with respect to NO, NH3, and O2 was also investigated. It was also shown that the N2 selectivity of the SCR reaction has a strong inverse correlation with the oxidation of ammonia.read more
Citations
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Journal ArticleDOI
Solution Combustion Synthesis of Nanoscale Materials
TL;DR: This Review focuses on the analysis of new approaches and results in the field of solution combustion synthesis (SCS) obtained during recent years, emphasizing the chemical mechanisms that are responsible for rapid self-sustained combustion reactions.
Journal ArticleDOI
Selective Catalytic Reduction of NOx with NH3 by Using Novel Catalysts: State of the Art and Future Prospects.
Lupeng Han,Sixiang Cai,Sixiang Cai,Min Gao,Jun-ya Hasegawa,Penglu Wang,Jianping Zhang,Liyi Shi,Dengsong Zhang +8 more
TL;DR: This review summarizes the latest SCR reaction mechanisms and emerging poison-resistant mechanisms in the beginning and subsequently gives a comprehensive overview of newly developed SCR catalysts, including metal oxide catalysts ranging from VOx, MnOx, CeO2, and Fe2O3 to CuO based catalysts.
Journal ArticleDOI
Catalysis for NOx abatement
TL;DR: In this paper, the main portion of the review discusses the progress and development of various catalysts for NOx removal from exhaust by NO decomposition, NO reduction by CO or H-2 or NH3 or hydrocarbons.
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
NOx Storage−Reduction Catalysis: From Mechanism and Materials Properties to Storage−Reduction Performance
Sounak Roy,Alfons Baiker +1 more
TL;DR: Theoretical and Surface Science Studies Studies 4079 6.1.
References
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Journal ArticleDOI
Chemical and mechanistic aspects of the selective catalytic reduction of NOx by ammonia over oxide catalysts: A review
TL;DR: In this paper, the open literature concerning chemical and mechanistic aspects of the selective catalytic reduction of NO by ammonia (SCR process) on metal oxide catalysts is reviewed, and the results of spectroscopic studies of the adsorbed surface species, adsorption-desorption measurements, flow reactor and kinetic experiments are analyzed.
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Mechanism of the Selective Catalytic Reduction of Nitric Oxide by Ammonia Elucidated by in Situ On-Line Fourier Transform Infrared Spectroscopy
TL;DR: A fundamental microkinetic model is proposed, which accounts for the observed industrial kinetics performance and suggests a catalytic cycle that consists of both acid and redox reactions and involves both surface V-OH (Brønsted acid sites) and V=O species.
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TiO2-supported metal oxide catalysts for low-temperature selective catalytic reduction of NO with NH3. I. Evaluation and characterization of first row transition metals
TL;DR: In this paper, low-temperature SCR of NO with NH3 in the presence of excess oxygen on the oxides of V, Cr, Mn, Fe, Co, Ni, and Cu supported on anatase TiO2 has been studied.
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Low-Temperature Selective Catalytic Reduction (SCR) of NO with NH3 by Using Mn, Cr, and Cu Oxides Supported on Hombikat TiO2
TL;DR: A Highly active, time stable, and water resistant, Hombikat TiO2 supported Mn catalyst has been developed for the selective reduction of NO by NH3.
Journal ArticleDOI
Identification of Surface Species on Titania-Supported Manganese, Chromium, and Copper Oxide Low-Temperature SCR Catalysts
TL;DR: In this article, the adsorption and coadsorption of NH3, NO, and O2, in conjunction with in situ FT-IR spectroscopy, was used to elucidate the reaction mechanism as the samples were heated from 323 to 673 K.