期刊
APPLIED CATALYSIS A-GENERAL
卷 251, 期 1, 页码 121-129出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0926-860X(03)00313-2
关键词
ammonia synthesis; wustite catalyst; magnetite catalyst
Contradictory results about the best oxidic precursor of Fe ammonia synthesis catalyst prompted the present comparative investigation on wustite- and magnetite-based catalysts. Many physical (density, porous texture, crystalline phases, reduction rate, metal surface, abrasion loss) and catalytic (kinetic constants, thermoresistancy) properties have been determined on both catalysts. The wustite-based catalyst proved to be much more active, especially at lower temperatures, approaching the performances of Ru/C catalyst, except at high conversion. Possible reasons for such a behavior of the wustite-based catalyst are discussed, suggesting that a reconsideration of the present consolidated knowledge on Fe ammonia synthesis catalyst might be convenient. (C) 2003 Elsevier Science B.V. All rights reserved.
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