Activity of alumina supported Fe catalysts for N2O decomposition

Effects of the iron content and thermal treatment

Pablo Alvarez, Paulo Araya, Rene Rojas, Sichem Guerrero, Gonzalo Aguila

Resultado de la investigación: Article

1 Cita (Scopus)

Resumen

The activity of Fe2O3/Al2O3 catalysts prepared by impregnation of Al2O3 with different amounts of Fe and calcination temperatures (650 and 900 °C) in the direct N2O decomposition reaction was studied. High calcination temperature was introduced to study the effect of "aging", which are the conditions prevailing in the process-gas option for N2O abatement. The catalysts were characterized by BET, XRD, UV-DRS, and H2-TPR. The incorporation of Fe promotes the alumina phase transition (g-Al2O3 to a-Al2O3) when the catalysts are calcined at 900 °C, which is accompanied by a decrease in the specifc area. The activity of the catalysts and the specifc surface area depend on Fe loading and calcination temperature. It was found that highly dispersed Fe species are more active than bulk type Fe2O3 particles. We conclude that Fe2O3/Al2O3 catalysts prepared by impregnation method are active in the decomposition of N2O, to be used at low or high reaction temperatures (tail-gas or process-gas treatments, respectively), as part of nitric acid production plant.

Idioma originalEnglish
Páginas (desde-hasta)3752-3759
Número de páginas8
PublicaciónJournal of the Chilean Chemical Society
Volumen62
N.º4
EstadoPublished - 1 ene 2017

Huella dactilar

Aluminum Oxide
Iron
Heat treatment
Decomposition
Catalysts
Calcination
Gases
Impregnation
Nitric Acid
Temperature
Aging of materials
Phase transitions

ASJC Scopus subject areas

  • Chemistry(all)

Citar esto

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abstract = "The activity of Fe2O3/Al2O3 catalysts prepared by impregnation of Al2O3 with different amounts of Fe and calcination temperatures (650 and 900 °C) in the direct N2O decomposition reaction was studied. High calcination temperature was introduced to study the effect of {"}aging{"}, which are the conditions prevailing in the process-gas option for N2O abatement. The catalysts were characterized by BET, XRD, UV-DRS, and H2-TPR. The incorporation of Fe promotes the alumina phase transition (g-Al2O3 to a-Al2O3) when the catalysts are calcined at 900 °C, which is accompanied by a decrease in the specifc area. The activity of the catalysts and the specifc surface area depend on Fe loading and calcination temperature. It was found that highly dispersed Fe species are more active than bulk type Fe2O3 particles. We conclude that Fe2O3/Al2O3 catalysts prepared by impregnation method are active in the decomposition of N2O, to be used at low or high reaction temperatures (tail-gas or process-gas treatments, respectively), as part of nitric acid production plant.",
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Activity of alumina supported Fe catalysts for N2O decomposition : Effects of the iron content and thermal treatment. / Alvarez, Pablo; Araya, Paulo; Rojas, Rene; Guerrero, Sichem; Aguila, Gonzalo.

En: Journal of the Chilean Chemical Society, Vol. 62, N.º 4, 01.01.2017, p. 3752-3759.

Resultado de la investigación: Article

TY - JOUR

T1 - Activity of alumina supported Fe catalysts for N2O decomposition

T2 - Effects of the iron content and thermal treatment

AU - Alvarez, Pablo

AU - Araya, Paulo

AU - Rojas, Rene

AU - Guerrero, Sichem

AU - Aguila, Gonzalo

PY - 2017/1/1

Y1 - 2017/1/1

N2 - The activity of Fe2O3/Al2O3 catalysts prepared by impregnation of Al2O3 with different amounts of Fe and calcination temperatures (650 and 900 °C) in the direct N2O decomposition reaction was studied. High calcination temperature was introduced to study the effect of "aging", which are the conditions prevailing in the process-gas option for N2O abatement. The catalysts were characterized by BET, XRD, UV-DRS, and H2-TPR. The incorporation of Fe promotes the alumina phase transition (g-Al2O3 to a-Al2O3) when the catalysts are calcined at 900 °C, which is accompanied by a decrease in the specifc area. The activity of the catalysts and the specifc surface area depend on Fe loading and calcination temperature. It was found that highly dispersed Fe species are more active than bulk type Fe2O3 particles. We conclude that Fe2O3/Al2O3 catalysts prepared by impregnation method are active in the decomposition of N2O, to be used at low or high reaction temperatures (tail-gas or process-gas treatments, respectively), as part of nitric acid production plant.

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KW - NO decomposition

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