Reaction Kinetics of CO and CO₂ Methanation over Nickel

Methanation of both CO and CO2 with electrolysis-sourced hydrogen is a key step in power-to-gas technologies nickel as the most prominent catalyst. Here, detailed, thermodynamically consistent reaction mechanism for methanation reactions over Ni-based catalysts presented. This microkinetic model based on mean-field approximation comprises 42 among 19 species. The was developed experiments from number studies powder monolith catalysts. These are numerically reproduced by flow field simulations coupled kinetic scheme. features multiple paths conversion into CH4, including carbide pathway direct hydrogenation surface. describes process adequately wide range temperatures, catalyst loadings, support materials, reactant ratios. Hence, it can serve basis engineering up-scaling purposes.