CO2 is a suitable feedstock for syngas production. Possible co-reactants to convert CO2 are hydrogen or methane. Hydrogen can be produced from electrolysis of water with renewable energy, whereby pure oxygen is obtained. Consequently, a simultaneous partial combustion of the energy-rich co-reactants (H-2 or CH4) with oxygen is possible to compensate for the required heat of reaction and to achieve high temperatures. This is crucial for both, high CO2 conversion and the prevention of harmful coke formation. For this application a new, scalable reactor concept is proposed. A proof of concept is presented both experimentally and model-based. The model predicts high CO2 conversion and syngas production in industrial scale while maintaining defined temperature limits so that coke formation is avoided.