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Article Dans Une Revue Catalysis Communications Année : 2015

The influence of pre-treatment gas mixture upon the ammonia synthesis activity of Co-Re catalysts

Karen Mcaulay
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J.S.J. Hargreaves
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A.R. Mcfarlane
  • Fonction : Auteur
D. J. Price
  • Fonction : Auteur
N. A. Spencer
  • Fonction : Auteur
H.F. Greer
  • Fonction : Auteur
W.Z. Zhou
  • Fonction : Auteur

Résumé

CoRe4 catalysts highly active for ammonia synthesis at ambient pressure and 400 degrees C can be prepared without an ammonolysis stage. Pre-treatments under 3:1 H-2:N-2 and 3:1 H-2:Ar atmospheres are shown to influence catalytic performance with the latter treatment leading to an induction period prior to development of activity upon switching to an ammonia synthesis feedstream. The difference in behaviour between the two pre-treatment atmospheres is manifested in temperature programmed nitrogen isotopic exchange experiments where H-2:Ar treated material is inactive and its H-2:N-2 treated counterpart is active.

Domaines

Catalyse

Dates et versions

hal-01359534 , version 1 (02-09-2016)

Identifiants

Citer

Karen Mcaulay, J.S.J. Hargreaves, A.R. Mcfarlane, D. J. Price, N. A. Spencer, et al.. The influence of pre-treatment gas mixture upon the ammonia synthesis activity of Co-Re catalysts. Catalysis Communications, 2015, 68, pp.53-57. ⟨10.1016/j.catcom.2015.04.016⟩. ⟨hal-01359534⟩
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