A system for removing contaminants from a pyrolysis fluid is provided. The system comprises a recirculation loop; and a bleed off line. The recirculation loop comprises a quenching vessel; separation apparatus; a recirculation line; and cooling apparatus. The quenching vessel has: a first inlet for receiving a supply of pyrolysis fluid; a second inlet arranged to receive a recirculated fluid; and an outlet for expelling quenched pyrolysis fluid. The separation apparatus is for removing contaminants from the quenched pyrolysis fluid to provide a clarified flow, the separation apparatus arranged to receive quenched pyrolysis fluid from the outlet. The recirculation line is arranged to receive at least a recirculation portion of the clarified flow and recirculate the recirculation portion to the second inlet. The cooling apparatus is arranged to cool fluid in the recirculation loop. The bleed-off line is for selectively bleeding-off a bleed-off portion of the clarified flow from the recirculation loop.

A pyrolysis method and a pyrolysis reactor for thermal decomposition of polymer waste materials, particularly rubber and plastics waste materials, using a fast pyrolysis process, are disclosed. The waste material is delivered to a pyrolytic chamber, and is heated to a decomposition temperature of the waste material by microwave radiation.

The invention relates to a process and system for converting carbon material into power. Carbon material 12 is gasified into synthesis gas 18 in a gasifier 16, and steam 14 is supplied to the gasifier 16. The synthesis gas 18 is supplied to a gas turbine 30, 36, 38 to produce power. Air 24 is added to the synthesis gas 18 prior to the gas turbine 30, 36, 38. Exhaust gas 40 from the gas turbine 30, 36, 38 is cooled in a first cooling device 42 with water 46 to produce steam 52. The steam is used in at least one steam turbine to produce power 56 and the steam 58 from at least one steam turbine 56 is recycled to the gasifier 16.