SciELO - Scientific Electronic Library Online

 
vol.62 número4ANTIBACTERIAL ACTIVITY AND HUMAN CELL CYTOTOXIC OF COBALT (III) COMPLEXES WITH 1,10-PHENANTHROLINE AND CARBOHYDRATE LIGANDSSYNTHESIS AND CHARACTERIZATIONS OF METALLIC NANOPARTICLES IN CHITOSAN BY CHEMICAL REDUCTION índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

  • Em processo de indexaçãoCitado por Google
  • Não possue artigos similaresSimilares em SciELO
  • Em processo de indexaçãoSimilares em Google

Compartilhar


Journal of the Chilean Chemical Society

versão On-line ISSN 0717-9707

Resumo

ALVAREZ, PABLO et al. ACTIVITY OF ALUMINA SUPPORTED Fe CATALYSTS FOR N2O DECOMPOSITION: EFFECTS OF THE IRON CONTENT AND THERMAL TREATMENT. J. Chil. Chem. Soc. [online]. 2017, vol.62, n.4, pp.3752-3759. ISSN 0717-9707.  http://dx.doi.org/10.4067/s0717-97072017000403752.

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 (γ-Al2O3 to α-Al2O3) when the catalysts are calcined at 900 °C, which is accompanied by a decrease in the specific area. The activity of the catalysts and the specific 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.

Palavras-chave : iron; alumina; impregnation method; N2O decomposition.

        · texto em Inglês     · Inglês ( pdf )