ie0c02072_si_001.pdf (1.57 MB)
Hydrogenation of CO/CO2 Mixtures on Nickel Catalysts: Kinetics and Flexibility for Nickel Catalysts
journal contribution
posted on 2020-08-07, 15:20 authored by Dominik Meyer, Jannik Schumacher, Jens Friedland, Robert GüttelThe power-to-gas process for the
chemical storage of renewable
energy in methane as a storage molecule requires a carbon source,
for which industrial exhaust gases are very promising because of their
availability in large quantities. The composition of these gas streams,
however, is often characterized by a mixture of CO and CO2. Because of the rather complex reaction mechanism, though, the methanation
of CO/CO2 mixtures using nickel catalysts is not yet fully
understood, and appropriate reaction kinetics required for the reactor
design are still lacking. Therefore, we report the experimental results
on the methanation of various mixtures of CO and CO2. The
data are further evaluated by a model-based approach in order to derive
reaction kinetics capable for the reactor design in a typical range
of operating conditions. The results also reveal two kinetic regimes
depending on the fraction of CO in the CO/CO2 mixture,
which is accounted for in the proposed kinetics.