Abstract: An apparatus and process for converting carbonaceous or other material with calorific value, wood, plastic, sewage, etc into high quality gas preferably to fuel a reciprocating gas engine for the generation of electricity. Wet fuel is delivered via conveyer 13 to fuel hopper 14. From the hopper the fuel is fed into the dryer 15 by a screw feeder The dried fuel then is checked for size via a trommel 16 where the correctly sized fuel passes through and the oversized fuel goes onto the reject conveyer 22 where it is delivered for shredding. The correct sized dry fuel is transported via a conveyer 17. The fuel is then fed via a feed system, to avoid the ingress of air, into the gasifier 19. The gas is cooled and cleaned in the gas quench unit 20. The gas is then compressed and stored. The char is quenched in a water trough then fed by a screw conveyer to a dryer 29 then stored in a hopper 30. Oils and tars that are carried over with the gas are removed by an extraction unit 27 and stored in storage vessel 28.