Heterogeneous methanation: Steady-state rate of CO hydrogenation on supported ruthenium, nickel and rhenium

Abstract

A study has been made of initial activity, steady-state activity and activity in the presence of H₂S for CO hydrogenation on a number of supported catalysts. Initial rates of CO hydrogenation were found to be similar on and Raney Ni catalysts when corrected for metal surface area. Under steady-state conditions, the specific reaction rate was a factor of 25 lower and the activities were in the order Raney . In the presence of 10 ppm of H₂S the activity decreased by an additional factor of 10 and the order was . The support has an appreciable effect on the extent of deactivation at steady state and the activity in the presence of sulfur-containing compounds. In addition, a comparison was made of the specific activity of supported Ni, Ru and Re catalysts at steady state and in sulfur-containing streams.