Method of carrying out thermolysis and thermolysis apparatus

A method for thermolysing organic material, the method comprising:

• A) feeding the material in a single-screw extruder, the extruder comprising
• a cylindrical rotor member having diameter D and length L and comprising a feeding zone,
• a feed opening, and
• a drying zone and a pyrolysis zone,
• the rotor member arranged in a barrel,
• a cylindrical surface of the rotor member carrying cavity/cavities and/or projection(s) arranged in helically extending rows,
• the helically extending row(s) of the rotor member having a pitch P and depth d in the feeding zone of the rotor member, wherein
• the pitch of the helically extending rows is a distance between two consecutive helically extending rows,
• the feeding zone comprises a part of the rotor member directly under the feed opening and five laps of the helically extending rows following the feed opening,
• a relation of the depth d to the diameter D of the rotor member, i.e. d:D, is not more than 1:20, and
• a relation of the pitch P of the rotor member to the diameter D of the rotor member, i.e. P:D, is not more than 1:4,
• B) heating the material in the single-screw extruder to a flowable state, and
• C) thermolysing the material, wherein the extruder is configured as a thermolysis reactor such that the thermolysis occurs in the single-screw extruder.