Journal ArticleDOI
Formation and reaction of ammonium sulfate salts on V2O5/AC catalyst during selective catalytic reduction of nitric oxide by ammonia at low temperatures
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In this paper, the formation rate and reaction rate of ammonium sulfate salts on V 2 O 5 /AC catalyst during selective catalytic reduction (SCR) of NO with NH 3 at low temperatures were studied using elemental analysis, transient response, and TPR methods.About:
This article is published in Journal of Catalysis.The article was published on 2003-03-10. It has received 163 citations till now. The article focuses on the topics: Ammonium sulfate & Ammonia.read more
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Ceria modified MnOx/TiO2 as a superior catalyst for NO reduction with NH3 at low-temperature
TL;DR: In this article, a series of cerium modified MnOx/TiO2 catalysts were prepared by sol-gel method and used for low-temperature selective catalytic reduction (SCR) of NOx with ammonia.
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The role of cerium in the improved SO2 tolerance for NO reduction with NH3 over Mn-Ce/TiO2 catalyst at low temperature
TL;DR: In this article, in situ diffuse reflectance infrared transform spectroscopy (DRIFT) investigations were carried out to determine the role of Ceria in the improved resistance for a Ce-modified Mn/TiO 2 catalyst, which showed that SO x ad-species preferentially formed on Ceria as bulk-like sulfate species and lessened the sulfation of the main active phase (MnO x ) during low-temperature selective catalytic reduction (SCR) processes in the presence of SO 2.
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Effect of ceria doping on SO2 resistance of Mn/TiO2 for selective catalytic reduction of NO with NH3 at low temperature
TL;DR: In this article, ceria modified Mn/TiO 2 was used for low-temperature selective catalytic reduction (SCR) of NO with NH 3 in the presence of SO 2.
Journal ArticleDOI
Low-temperature selective catalytic reduction of NO with NH3 over MnCe oxides supported on TiO2 and Al2O3: A comparative study
TL;DR: NH(3) temperature programmed desorption study proved that MnCe/TiO(2) was mainly Lewis acidic, while MnCE/Al( 2)O( 3) could provide more Brönsted acid sites and make a significant contribution to the improved NO conversion at higher temperature.
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DRIFT Study of the SO2 Effect on Low-Temperature SCR Reaction over Fe−Mn/TiO2
TL;DR: In this paper, the authors carried out an in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFT) investigation for revealing the mechanism of the SO2 effect on the SCR reaction.
References
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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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Reactivity of V2O5Catalysts for the Selective Catalytic Reduction of NO by NH3: Influence of Vanadia Loading, H2O, and SO2
TL;DR: In this paper, a systematic investigation of the selective catalytic reduction (SCR) of NO by NH3over V2O5/TiO2catalysts of variable vanadia loading has been carried out at 623 K. The structure of various catalysts, as well as adsorbed species present on their surface, was characterized byin situRaman and infrared spectroscopies.
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Deactivation by SO2 of MnOx/Al2O3 catalysts used for the selective catalytic reduction of NO with NH3 at low temperatures
TL;DR: In this article, the impact of low concentrations of SO 2 on the activity of low loaded alumina supported manganese oxides has been investigated, and it was shown that the deactivation is not due to the formation of (bulk or surface) Al 2 (SO 4 ) 3 or deposition of ammonium sulphates.
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Selective Catalytic Reduction of NO with NH3 on SO−24/TiO2 Superacid Catalyst
J.P. Chen,Ralph T. Yang +1 more
TL;DR: In this article, SO−24/TiO2 superacid was studied for selective catalytic reduction (SCR) of NO with NH3, and the results also elucidate the role of TiO2 support (and SO2) in the SCR reaction.
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Characterization of Fe-ZSM-5 Catalyst for Selective Catalytic Reduction of Nitric Oxide by Ammonia
Richard Q. Long,Ralph T. Yang +1 more
TL;DR: In this article, the most active catalyst known for the selective catalytic reduction (SCR) of NO with ammonia, was characterized by X-ray photoelectron spectroscopy (XPS), H2 temperature-programmed reduction (H2-TPR), electron spin resonance (ESR), and FT-IR spectra, showing that NO molecules could be oxidized by O2 to adsorbed N2O3, NO2, and nitrate, and NOx adspecies were not stable at above 300°C in He, but the adsor