Collect. Czech. Chem. Commun. 1994, 59, 855-874

A Mathematical Model of a Gauze Reactor for the Ammonia Oxidation

Vlastimil Fíla and Bohumil Bernauer

Department of Inorganic Technology, Prague Institute of Chemical Technology, 166 28 Prague 6, Czech Republic


The behaviour of an industrial reactor for the oxidation of ammonia with Pt-Rh gauzes was simulated by means of a mathematical model accounting for the axial dispersion of the components, radiative heat transmission in the reactor, and the effect of temperature on the physico-chemical properties of the reacting mixture. The effect of the preheating temperature, the input mixture composition, pressure and reactor load on the temperature distribution in the catalyst bed and on the NO yield was examined. The calculated NO yields agree well with the values actually attained in industrial reactors. The effect of the reaction mixture composition and total pressure on the yield is also consistent with observed dependences.