Comparing Co?catalytic Effects of ZrO _x , SmO _x , and Pt on CO _x Methanation over Co?based Catalysts Prepared by Double Flame Spray Pyrolysis

The impact of different co-catalytically acting promoters (Pt, ZrOx and SmOx) during COx methanation was investigated on alumina supported Co-based model catalysts. To obtain samples with identical structure morphology independent the presence type promoter added, double flame spray pyrolysis employed for synthesis, which, in contrast to classical catalyst preparation techniques, allows controlling separating particle formation processes components. In this way, differently promoted unpromoted catalysts size distributions dispersions could be synthesized study co-catalytic effects isolation. For CO2 methanation, all led improved yields long-term activities within whole temperature range as compared catalyst. Among them, zirconia platinum performed best. case CO a beneficial influence studied also verified – Pt showing best results. Yet, deactivated rapidly above 310 °C, limiting their usability lower temperatures.