Activation energy Adiabatic packed reactors Algorithms Alkalinity Apparent activation energy CO 2 methanation Carbon dioxide Catalysis Catalyst deactivation Catalyst poisoning Catalyst supports Catalysts Catalytic performance Ceria Cerium compounds Cerium oxide Chemical reactors Deactivation Doped ceria Doped-ceria Fixed-Bed Greenhouse effect Hydrogenation Inlet temperature trajectories Mathematical models Methanation Nickel Optimization Oxygen storage capacity Promotion effects