Method and device for carbon injection and recirculation of synthesis gas when producing synthesis gas

A device for introducing pulverulent material (C) into a gasification reactor (2), wherein a process gas (P) supplied to the gasification reactor (2) is reduced to a synthesis gas (S) by the pulverulent material (C), wherein the device comprises:

• an injection nozzle (1) comprising
• a central tube/central channel (6) provided in the injection nozzle configured for introducing the pulverulent material (C) into the gasification reactor (2);
• and
• a Laval nozzle (15) arranged on an outside of the central tube (6),
• wherein the central tube/central channel (6) opens directly into a gasification space (5) in the gasification reactor (2), and
• the injection nozzle (1) includes further channels (14) for the recirculation of a reaction product (Rs) and that the further channels (14) communicate with the central tube/central channel (6) in a region of an end of the injection nozzle (1) directed away from the gasification space (5) in the gasification reactor (2).