The effect of NO  on the catalytic decomposition of nitrous oxide over Fe-MFI zeolites

Kögel, M.; Abu-Zied, Baha M; Schwefer, M.; Turek, Thomas

doi:10.1016/s1566-7367(01)00046-2

Cited by 41 publications

(36 citation statements)

References 18 publications

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“…Iron-zeolites, especially Fe-ZSM-5, are being studied for use as catalysts for N 2 O decomposition [11][12][13][14][15][16][17][18]. NO x , that is usually present in the off-gas, promotes N 2 O decomposition over iron-zeolites [11].…”

Section: Introductionmentioning

confidence: 99%

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Synergy between metals in bimetallic zeolite supported catalyst for NO-promoted N2O decomposition

et al. 2005

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The detrimental effect of NO on N 2 O decomposition over zeolite supported noble metal catalysts can be (partly) eliminated by combining noble metal with iron or cobalt. In the presence of NO, the total conversion of N 2 O over these bimetallic-zeolites exceeds the sum of conversions over the monometallic analogues of the individual components. A synergistic effect between the metals is proposed to be responsible for this phenomenon. This synergistic effect gives superior N 2 O decomposition activity under realistic conditions, i.e. in the presence of water and NO, at temperatures as low as 350°C. The nature of the synergy is discussed in the light of some preliminary observations.

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Section: Introductionmentioning

confidence: 99%

“…NO x , that is usually present in the off-gas, promotes N 2 O decomposition over iron-zeolites [11]. Fe-FER [2,14] and Fe-BEA [18] perform particularly well.…”

Section: Introductionmentioning

confidence: 99%

Synergy between metals in bimetallic zeolite supported catalyst for NO-promoted N2O decomposition

et al. 2005

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“…NO, even at low concentrations, has been found to play an important, positive role in the decomposition of N 2 O on iron zeolites as reported by Ko¨gel et al (2001) and Pe´rez-Ramı´rez et al (2002). Since nitric acid plant tail gases invariably contain NO this co-catalytic effect (Ko¨gel et al 2001) can be usefully exploited.…”

Section: Literature On Tertiary N 2 O Abatement and Scr Of No X Over mentioning

confidence: 91%

“…Since nitric acid plant tail gases invariably contain NO this co-catalytic effect (Ko¨gel et al 2001) can be usefully exploited. The co-catalytic effect was found to depend upon the method of preparation of the iron zeolite (Pirngruber and Pieterse 2006).…”

Section: Literature On Tertiary N 2 O Abatement and Scr Of No X Over mentioning

confidence: 99%

Uhde EnviNO_x® technology for NO_Xand N₂O abatement: a contribution to reducing emissions from nitric acid plants

Groves

Sasonow

2010

Journal of Integrative Environmental Sciences

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“…The procedure is detailed described in Refs. [33,34]. The final catalyst powder, containing 4.98% Fe (w/w) determined by ICP, was pressed into tablets and crushed to a particle size fraction of 250-500 m which was used in all experiments.…”

Section: Preparation Of the Catalystmentioning

confidence: 99%

Experimental techniques for investigating the surface oxygen formation in the N2O decomposition on Fe-MFI zeolites

Ateş¹,

Reitzmann²

2007

Chemical Engineering Journal

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Several experimental techniques were used to investigate the formation of surface oxygen in the N 2 O decomposition on an Fe-MFI zeolite. These techniques consisted of multipulse and step experiments as transient methods at ambient pressure and experiments in a closed set-up of Panov and co-workers at strongly reduced pressure. The total amount of surface oxygen determined through multipulse experiments was in the range of the amount obtained in the vacuum set-up at 523 K (40-50 mol O g −1 catalyst ). In contrast, the step technique revealed considerably higher values, up to 110 mol O g −1 catalyst , indicating an accumulation of oxygen in the zeolite. This phenomenon might also be responsible for the observation that higher reaction temperatures increase the total amount of surface oxygen, which can be deposited in the zeolite. In contrast to experiments in the vacuum set-up, the temperature-programmed desorption after multipulse and step experiments shows the presence of various oxygen species differing in thermal stability. The influence of temperature on the rate of surface oxygen formation was determined from step and vacuum experiments. The results of the step experiments lead to a lower activation energy, 14 kJ mol −1 , than the experiments in the vacuum set-up (49 kJ mol −1 ), probably due to sorption and mass transfer effects. Comparing the rate of surface oxygen formation and of total N 2 O decomposition reveals that the former is very fast and not rate determining for the latter. Furthermore, the rate of total N 2 O decomposition seems to be inhibited by adsorbed N 2 O, detected in the transient experiments. This observation is considered in an adequate kinetic model.

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The effect of NO on the catalytic decomposition of nitrous oxide over Fe-MFI zeolites

Cited by 41 publications

References 18 publications

Synergy between metals in bimetallic zeolite supported catalyst for NO-promoted N2O decomposition

Synergy between metals in bimetallic zeolite supported catalyst for NO-promoted N2O decomposition

Uhde EnviNO_x® technology for NO_Xand N₂O abatement: a contribution to reducing emissions from nitric acid plants

Experimental techniques for investigating the surface oxygen formation in the N2O decomposition on Fe-MFI zeolites

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The effect of NO on the catalytic decomposition of nitrous oxide over Fe-MFI zeolites

Cited by 41 publications

References 18 publications

Synergy between metals in bimetallic zeolite supported catalyst for NO-promoted N2O decomposition

Synergy between metals in bimetallic zeolite supported catalyst for NO-promoted N2O decomposition

Uhde EnviNOx® technology for NOXand N2O abatement: a contribution to reducing emissions from nitric acid plants

Experimental techniques for investigating the surface oxygen formation in the N2O decomposition on Fe-MFI zeolites

Contact Info

Product

Resources

About

Uhde EnviNO_x® technology for NO_Xand N₂O abatement: a contribution to reducing emissions from nitric acid plants