NOVELTY - Manufacture of syngas involves directing hot-treated syngas (20) from reaction chamber through the at least one cooler portion of media bed to a opening (B)of the distributor connected to an outlet of the thermal cracker to cool the hot treated syngas while heating the at least one cooler portion of the media bed, heating at least one cooler portion of the media bed by the hot treated syngas to receive the raw syngas, arranging at least one hot portion of the media bed, and cooling (24) at least one hot portion of the media bed by raw syngas to receive the hot treated syngas.    USE - Manufacture of syngas used for synthetic fuels e.g. gaseous fuels, liquid fuels or solid fuels for engine, fuel cell and turbine.    ADVANTAGE - The method provides clean syngas with reduced content of tar, inorganic material and particulate material, by efficient process.    DETAILED DESCRIPTION - Manufacture of syngas involves generating raw syngas from biomass in a gasifier, treating the raw syngas in a thermal cracker comprising a media bed having at least one hot portion and at least one cooler portion and a reaction chamber within a housing, directing the raw syngas from a opening (A)of a distributor through the at least one hot portion of a media bed to the reaction chamber to preheat the raw syngas prior to admitting the raw syngas to the reaction chamber while cooling the at least one hot portion of the media bed, treating the preheated syngas in the reaction chamber by thermally cracking tars and/or other high molecular weight hydrocarbons in the preheated syngas to provide hot treated syngas, directing the hot treated syngas from the reaction chamber through the at least one cooler portion of the media bed to a opening (B)of the distributor connected to an outlet of the thermal cracker to cool the hot treated syngas while heating the at least one cooler portion of the media bed, periodically or continuously reconfiguring the relative orientation between the distributor and the media bed to arrange the at least one cooler portion of the media bed, heating at least one cooler portion of the media bed by the hot treated syngas to receive the raw syngas, arranging at least one hot portion of the media bed, and cooling at least one hot portion of the media bed by the raw syngas to receive the hot treated syngas. The heat from the hot treated syngas is transferred by the media bed to preheat the raw syngas in the thermal cracker upstream from the reaction chamber and to provide a flow of treated syngas at an output of the thermal cracker that is cooler than the hot treated syngas. An INDEPENDENT CLAIM is included for apparatus, which comprises a gasifier, and a thermal cracker in fluid communication with the gasifier. The thermal cracker comprises a housing enclosing a media bed and a reaction chamber. The media bed comprises a plurality of portions, and a reconfigurable gas supply system comprising a valveless distributor having an inlet port connected to receive raw syngas from the gasifier and to deliver the raw syngas to the media bed and an exit port connected to receive treated syngas from the media bed and to carry the treated syngas to an outlet of the thermal cracker. The thermal cracker is arranged to provide a path for carrying syngas from the inlet port of the distributor, through one of the plurality of portions of the media bed that is in a first position relative to the distributor, to the reaction chamber and from the reaction chamber, through a different one of the plurality of portions of the media bed that is in a second position relative to the distributor to the exit port of the distributor, and the thermal cracker is reconfigurable by moving the inlet port and the exit port relative to the media bed to change which one of the plurality of portions of the media bed is arranged in the first position to carry the syngas from the inlet port to the reaction chamber and to change which one of the plurality of portions of the media bed is arranged in the second position to carry the syngas from the reaction chamber to the outlet port.    DESCRIPTION OF DRAWING(S) - The drawing shows the flow chart of manufacture of syngas.    Generating clean gas (10)    Introducing biomass (12)    Gasifying biogas (14)    Drawing off syngas (16)    Passing raw gas through heated media bed (20)    Passing hot syngas through cooled media bed (24)