Effect of hydrogen sulphide on the deactivation of alumina‐supported ruthenium methanation catalysts

Abstract

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.

CO2 Methanation in Microstructured Reactors – Catalyst Development and Process Design

“…Ru has a high activity for the methanation reaction of both CO (selective methanation) and CO 2 , the latter usually occuring at much higher temperature, but its sulfur tolerance is quite low . It is also very costly, but its superior activity compared to other methanation catalysts such as Rh, Mo, Ni, Co, and Fe make it a promising candidate for applications , .…”