Active Site of O2 and Its Improvement Mechanism over Ce-Ti Catalyst for NH3-SCR Reaction
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چکیده
منابع مشابه
THE NEW “ENHANCED NH3-SCR” REACTION FOR NOx EMISSION CONTROL
NH3-Selective Catalytic Reduction (SCR) is applied worldwide to DeNOx of combustion exhausts from stationary and mobile sources, but a greater DeNOx activity at low temperatures is desired to meet forthcoming restrictive legislations. We have obtained high NO reduction efficiencies at 200 – 300 °C over commercial V-based and Fe-exchanged zeolite catalysts by reacting NO with both ammonia and ni...
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Introduction Nitrous oxide (N2O) is a strong greenhouse gas with global warming potential (GWP) which is much greater, by 310 times, than that of CO2, and chronic exposure of humans to it even with low concentrations has been known to cause miscarriages in an early gestation period, liver disorders, kidney troubles, cancers and troubles of nervous systems [1-3]. N2O having such effects and high...
متن کاملRadio-Frequency-Controlled Urea Dosing for NH3-SCR Catalysts: NH3 Storage Influence to Catalyst Performance under Transient Conditions
Current developments in exhaust gas aftertreatment led to a huge mistrust in diesel driven passenger cars due to their NOx emissions being too high. The selective catalytic reduction (SCR) with ammonia (NH₃) as reducing agent is the only approach today with the capability to meet upcoming emission limits. Therefore, the radio-frequency-based (RF) catalyst state determination to monitor the NH₃ ...
متن کاملSynthesis and functionalization of SSZ-13 as an NH3-SCR catalyst
Hydrothermal synthesis of Na-SSZ-13 using a low concentration of the structure-directing agent N,N,N-trimethyl-1-adamantanimonium hydroxide and functionalization of the SSZ-13 framework through the introduction of Cu and Fe via ion exchange have been carried out. The prepared samples were characterized by XRD, SEM, and UV-vis spectroscopy, N2 sorption, XRF and NH3-TPD. It was found that relativ...
متن کاملPromotional Effect of Ce on Iron-Based Catalysts for Selective Catalytic Reduction of NO with NH3
A series of Fe–Ce–Ti catalysts were prepared via co-precipitation method to investigate the effect of doping Ce into Fe–Ti catalysts for selective catalytic reduction of NO with NH3. The NO conversion over Fe–Ce–Ti catalysts was considerably improved after Ce doping compared to that of Fe–Ti catalysts. The Fe(0.2)–Ce(0.4)–Ti catalysts exhibited superior catalytic activity to that of Fe(0.2)–Ti ...
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ژورنال
عنوان ژورنال: Catalysts
سال: 2018
ISSN: 2073-4344
DOI: 10.3390/catal8080336