The data is associated with the novel design of a catalytic combustor for syngas. The high-fidelity simulations were employed to test different scenarios for heterogeneous combustion of syngas on different catalytic surfaces (palladium, rhodium and palladium oxides). Different grades of syngas combustion over different catalyst types such as: pellet shapes and reactor bed types have been tested. Our design is able to proceed the combustion at near stochiometric condition at a low temperature (1500 K).