Abstract: A method for producing syngas includes a) splitting a hydrocarbon into carbon and hydrogen using a plasma to obtain a first product including carbon and hydrogen, b) mixing steam and carbon dioxide with at least a portion of the first product to produce a product stream, wherein a first portion of the carbon in the first product is converted in an endothermic reaction with steam to carbon monoxide and hydrogen and a second portion of the carbon in the first product is converted in another endothermic reaction with the carbon dioxide to carbon monoxide, and wherein heat is supplied to the endothermic reaction, and c) quenching the product stream of step b).

Abstract: The apparatus described herein comprises a first reaction chamber having an inlet for a hydrocarbon medium, particularly a gas having the composition CnHm, and an outlet. Means for decomposing the hydrocarbons into carbon particles and hydrogen by introducing heat are provided between the inlet and the outlet in the first reaction chamber. The apparatus also comprises a second reaction chamber having an elongated configuration and having a first inlet at one end and an outlet at the opposite end, wherein the first inlet of the second reaction chamber is connected with the outlet of the first reaction chamber, and wherein the second reaction chamber comprises a widening flow cross-section (measured perpendicular to the longitudinal dimension of the second reaction chamber) between the inlet and the outlet. In addition, at least one second inlet into the second reaction chamber is provided, wherein the second inlet can be connected to a source for CO2 and/or H2O.