Selective catalytic reduction of NO and NO2 at low temperatures

Koebel, Manfred; Madia, Giuseppe; Elsener, Martin

doi:10.1016/s0920-5861(02)00006-8

Cited by 371 publications

(271 citation statements)

References 12 publications

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“…In the low temperature regime of 200-300 °C, where NOx conversion is determined by the catalyst activity and mass transfer limitations are negligible [25,36,37], the reaction rate constant kmass Temperature / °C ( Figure 3) was calculated according to Equation (2). With this value, the catalysts can be compared irrespective of the small loading deviations of the washcoat.…”

Section: Catalytic Activitymentioning

confidence: 99%

VOx Surface Coverage Optimization of V2O5/WO3-TiO2 SCR Catalysts by Variation of the V Loading and by Aging

et al. 2015

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V2O5/WO3-TiO2 selective catalytic reduction (SCR) catalysts with a V2O5 loading of 1.7, 2.0, 2.3, 2.6, 2.9, 3.2 and 3.5 wt. % were investigated in the fresh state and after hydrothermal aging at 600 °C for 16 h. The catalysts were characterized by means of nitrogen physisorption, X-ray diffraction and X-ray absorption spectroscopy. In the fresh state, the SCR activity increased with increasing V loading. Upon aging, the catalysts with up to 2.3 wt. % V2O5 exhibited higher NOx reduction activity than in the fresh state, while the catalysts with more than 2.6 wt. % V2O5 showed increasing deactivation tendencies. The observed activation and deactivation were correlated with the change of the VOx and WOx surface coverages. Only catalysts with a VOx coverage below 50% in the aged state did not show deactivation tendencies. With respect to tungsten, above one monolayer of WOx, WO3 particles were formed leading to loss of surface acidity, sintering, catalyst deactivation and early NH3 slip. An optimal compromise between activity and hydrothermal aging resistance could be obtained only with V2O5 between 2.0 and 2.6 wt. %.

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Section: Catalytic Activitymentioning

confidence: 99%

VOx Surface Coverage Optimization of V2O5/WO3-TiO2 SCR Catalysts by Variation of the V Loading and by Aging

et al. 2015

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“…2N 2 + 3H 2 O [16,27,28]. The effect of NO 2 and the detailed ''fast SCR'' reaction mechanism have been studied extensively over conventional V 2 O 5 -WO 3 /TiO 2 and Fe-zeolite catalysts (such as Fe/HBEA and Fe/ZSM-5) by many researchers [4,[29][30][31][32][33]. In this study, the effect of Mn substitution amounts on NO oxidation activity of iron titanate catalyst was also investigated and the results are shown in Fig.…”

Section: No and Nh 3 Oxidation Activities Of Fe A Mn 1àa Tio X Catalystsmentioning

confidence: 99%

Effect of manganese substitution on the structure and activity of iron titanate catalyst for the selective catalytic reduction of NO with NH3

Liu

Ding

et al. 2009

Applied Catalysis B: Environmental

606

355

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“…4N 2 + 6H 2 O), in contrast to standard ammonia SCR reaction (4NH 3 + 4NO + O 2 ! 4N 2 + 6H 2 O), is receiving more and more attention [3][4][5][6][7][8][9]. The reaction between equimolar NO-NO 2 and NH 3 is c.a.…”

Section: Introductionmentioning

confidence: 99%

Oxidation of nitric oxide to nitrogen dioxide over Ru catalysts

Cheng

et al. 2009

Applied Catalysis B: Environmental

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Selective catalytic reduction of NO and NO2 at low temperatures

Cited by 371 publications

References 12 publications

VOx Surface Coverage Optimization of V2O5/WO3-TiO2 SCR Catalysts by Variation of the V Loading and by Aging

VOx Surface Coverage Optimization of V2O5/WO3-TiO2 SCR Catalysts by Variation of the V Loading and by Aging

Effect of manganese substitution on the structure and activity of iron titanate catalyst for the selective catalytic reduction of NO with NH3

Oxidation of nitric oxide to nitrogen dioxide over Ru catalysts

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