Poisoning of iron catalyst with sulfur

Walerian Arabczyk 1Dariusz Moszynski 1Urszula Narkiewicz Rafał Pelka 

1. Technical University of Szczecin, Institute of Chemical and Environment Engineering, Pulaskiego 10, Szczecin 70-322, Poland

Abstract

Sulfur has a strong affinity to metal surfaces and acts as a poison of many metal catalysts, blocking active sites on the catalyst surface.

In this paper the effect of sulfur on the activity of identical iron catalysts used in three different processes, namely: methane decomposition, ammonia synthesis and its decomposition, is compared. In all cases the adsorption of sulfur on the catalyst surface decreases the reaction rate. However, the influence of poison on the apparent activation energy of each process and the dependence of the activity on the temperature differ. The observed differences are attributed to the various character of the active sites involved in each process.
 

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Presentation: Keynote lecture at E-MRS Fall Meeting 2006, Symposium B, by Dariusz Moszynski
See On-line Journal of E-MRS Fall Meeting 2006

Submitted: 2006-06-12 08:59
Revised:   2009-06-07 00:44