Development and Validation of a Simplified Kinetic Model for Ni-Ru/CeO2 Catalysts in Low-Temperature Steam Methane Reforming and as a Basis for Integrated Power-to-Gas Systems

Nickel–ruthenium catalysts supported on CeO₂ were investigated for low-temperature steam methane reforming and potential Power-to-Gas applications. Experiments were conducted at 400–550 °C and 2–5 bar under kinetically controlled conditions. SMR conversion increased with temperature and decreased with pressure, while WGS conversion improved at higher pressure. CO₂ showed negligible effects on methane conversion. Among the tested LHHW models, molecular hydrogen desorption best described the data, enabling reliable simulations of SMR and CO₂ methanation.