The Impact of Support Material of Cobalt?Based Catalysts Prepared by Double Flame Spray Pyrolysis on CO ₂ Methanation Dynamics

Methanation is capable of chemical storage fluctuating renewable energy, which requires fundamental understanding the dynamics kinetic processes taking place on catalyst surface. In order to elucidate impact support dynamics, Co-based model catalysts were synthesized via double flame spray pyrolysis (DFSP) differing only in materials. particular, Co nanoparticles identical particle size distributions are supported SiO2, TiO2 and SiO2-TiO2 mixtures by independent formation active metal means DFSP. The transient behavior was studied step changes feed gas composition analysis reactor response with high temporal resolution, according periodic kinetics method. It revealed that H2O adsorption strongly depends increasing sorption capacity from TiO2. induces a sorption-enhancement effect thereby promotes CH4 rate for Co/TiO2 catalysts. Transient experiments before after steady-state operation period under CO2 methanation reveal an unchanging reaction mechanism, while selectivity towards CO observed together certain degree deactivation. Hence, material identified play major role activity, deactivation methanation.