The selective catalytic reduction of NO by propylene over Pt supported on dealuminated Y zeolite

Amiridis, Michael D.; Roberts, Kenneth L.; Pereira, Candido

doi:10.1016/s0926-3373(97)00023-4

Cited by 52 publications

(17 citation statements)

References 9 publications

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“…Since 1990 [1,2], a variety of lean deNO x catalysts combinations have been pro-posed [3][4][5][6], and there are two major kinds of catalyst combinations: non-noble metal-based catalysts and noble metal-based catalysts. Noble metal-based catalysts seem to be more promising due to their lower light-off temperature and relatively high hydrothermal stability [7].…”

Section: Introductionmentioning

confidence: 99%

Catalytic reduction of NO over in situ synthesized Ir/ZSM-5 monoliths

Wang

Liang

et al. 2001

Applied Catalysis B: Environmental

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Section: Introductionmentioning

confidence: 99%

Catalytic reduction of NO over in situ synthesized Ir/ZSM-5 monoliths

Wang

Liang

et al. 2001

Applied Catalysis B: Environmental

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“…Propene, propane, ethylene and methane have been successfully employed as reductants. Formulations such as H-ZSM5 [6,11], Co-ZSM5 [7,9,10], Pd/H-, Na-ZSM5 [11], Cu-ZSM5 [3,10] Rh-ZSM5 [10], Pt-ZSM5 [10], Mn-ZSM5 [9,13], Ni-ZSM5 [9], Pt-dealuminated Y zeolite (Pt-DeY) [12], metal-exchanged mordenite [9] or metal-exchanged ferrierites [8], have been extensively studied.…”

Section: Introductionmentioning

confidence: 99%

The effect of sodium on the Pd-catalyzed reduction of NO by methane

Yentekakis

Lambert

Konsolakis

et al. 1998

Applied Catalysis B: Environmental

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The kinetics of NO reduction by methane over Pd catalysts supported on 8 mol% yttria-stabilised zirconia (YSZ) has been studied at atmospheric pressure in the 620±770 K temperature range. Langmuir±Hinshelwood type kinetics are found with characteristic rate maxima re¯ecting competitive adsorption of NO and methane: NO adsorption is much more pronounced than that of methane within the temperature range of this investigation. Pd is an effective catalyst: 100% selectivity towards N 2 can be achieved at 100% conversion of NO over this wide temperature range. Sodium causes strong poisoning of the reaction. The response of the system to variations in NO and methane concentrations, temperature, and sodium loading indicate that this is due to the Na-induced enhancement of NO chemisorption and dissociation relative to methane adsorption, i.e. sodium enhances oxygen poisoning of the catalyst. These results stand in revealing contrast to the strong promotional effect of sodium in the reduction of NO by propene over the same catalysts. The very different response of the two hydrocarbon reductants to Na doping of the Pd catalyst receives a consistent explanation. #

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“…This is a quite expected result, since the increase of ethanol concentration in the gas phase is expected to lead to the increase of adsorbed C x H y species on the catalyst's surface, which reacts with adsorbed NO x species to form N 2 [34,53]. In fact, a positive reaction order for ethanol was reported by several researchers for the NO/EtOH/O 2 reaction [36][37][38][39][40][41][42][43]. The decrease of N 2 production rate at reaction temperatures higher than 275 • C can be explained on the basis of ethanol combustion by oxygen.…”

Section: Effect Of Ethanol Concentration In the Feedmentioning

confidence: 70%