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The deactivation of 9% Rez07-Al203 catalyst during the metathesis of propene is investigated. Based on integral kinetic measurements and assuming separable deactivation kinetics, a deactivation rate equation has been developed which fits the experimental results well.

The deactivation of a 0.5% ruthenium‐alumina catalyst for the methanation reaction has been studied at 250 and 400 °C in the absence and presence of small concentrations of hydrogen sulphide (H2S). The adequacy of a suggested mechanistic model for the methanation reaction has been confirmed and the model has been applied to the deactivation in the absence of H2S, which is significantly improved with respect to an empirical methanation rate equation. The effect of the presence of 10 mg dm−3 H2S in the reactant stream on the catalyst deactivation rate has also been investigated.