In the present work, we compared the catalytic activity and mainly the stability under the usual ammonia synthesis conditions, of some carbon supports, differing as for their nature, purity and temperature of pretreatment. The effect of catalyst composition (metal and promoters loading) on stability was also investigated. XRD and N-2 adsorption/desorption analysis helped in elucidating the effect of carbon treatment. It was found that only after the support has been heated at least at 1900 degrees C the stability of the tri-promoted catalyst becomes fully satisfactory and virtually independent of Ru loading. For practical purposes such high temperature treatment must be compatible with the preservation of a sufficiently high surface area.

Graphitised carbon as support for Ru/C ammonia synthesis catalyst / I. Rossetti, N. Pernicone, L. Forni. - In: CATALYSIS TODAY. - ISSN 0920-5861. - 102(2005), pp. 219-224. ((Intervento presentato al 1. convegno International Symposium on Carbon for Catalysis (Carbo-Cat-1) tenutosi a Lausanne nel 2004.

Graphitised carbon as support for Ru/C ammonia synthesis catalyst

I. Rossetti
Primo
;
L. Forni
2005

Abstract

In the present work, we compared the catalytic activity and mainly the stability under the usual ammonia synthesis conditions, of some carbon supports, differing as for their nature, purity and temperature of pretreatment. The effect of catalyst composition (metal and promoters loading) on stability was also investigated. XRD and N-2 adsorption/desorption analysis helped in elucidating the effect of carbon treatment. It was found that only after the support has been heated at least at 1900 degrees C the stability of the tri-promoted catalyst becomes fully satisfactory and virtually independent of Ru loading. For practical purposes such high temperature treatment must be compatible with the preservation of a sufficiently high surface area.
carbon supported Ru catalyst; graphitisation; ammonia synthesis
Settore CHIM/02 - Chimica Fisica
2005
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/14586
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