Method for producing synthesis gas

A method for producing synthesis gas with a reactor comprising a first reaction zone and a second reaction zone, the method comprising:

• introducing, into the first reaction zone, the first reaction zone being free of a catalyst, a coke-oven gas comprising a hydrocarbon and a converter gas comprising carbon dioxide;
• reacting, the hydrocarbon with the carbon dioxide to form water;
• reacting the water, thermally with the hydrocarbon to form synthesis gas containing carbon monoxide and hydrogen;
• introducing, into the second reaction zone, an oxygen-containing gas and the hydrogen from the first reaction zone;
• producing thermal energy from the oxygen-containing gas and the hydrogen from the first reaction zone;
• and
• supplying the thermal energy produced in the second reaction zone to the first reaction zone.