NOVELTY - The biomass gasification system comprises a feedstock preparation system (20), a gasifier, and an additive recycle system. The feedstock preparation system is configured to generate a biomass feedstock comprising a biomass fuel and a tar cracking additive. The gasifier is configured to receive the biomass feedstock and to gasify the biomass fuel in the presence of the tar cracking additive to generate first and second mixtures. The first mixture comprises producer gas and a first portion of the tar cracking additive. The second mixture comprises a second portion of the tar cracking additive.    USE - The system is useful for gasifying a solid fuel such as sawdust, agricultural wastes and wood wastes to generate a gaseous fuel.    ADVANTAGE - The systems efficiently, economically and rapidly generates the gaseous fuel with high purity.    DETAILED DESCRIPTION - The biomass gasification system comprises a feedstock preparation system (20), a gasifier, and an additive recycle system. The feedstock preparation system is configured to generate a biomass feedstock comprising a biomass fuel and a tar cracking additive. The gasifier is configured to receive the biomass feedstock and to gasify the biomass fuel in the presence of the tar cracking additive to generate first and second mixtures. The first mixture comprises producer gas and a first portion of the tar cracking additive. The second mixture comprises a second portion of the tar cracking additive and ash. The additive recycle system is configured to receive the second mixture and to separate a portion of the tar cracking additive from the ash to generate a recycled additive feed for the feedstock preparation system. The recycled additive feed comprises the first portion of the tar cracking additive and/or the second portion of the tar cracking additive. The additive recycle system comprises a first separation unit that is configured to receive the second mixture from the gasifier and to separate the second portion of the tar cracking additive from the ash, a second separation unit that is configured to receive the first mixture from the gasifier and to separate the first portion of the tar cracking additive from the producer gas, and a electrostatically charged vessel that is configured to receive the first mixture from the gasifier and to separate the first portion of the tar cracking additive from the producer gas based on charge. The feedstock preparation system is further configured to direct the recycled additive feed and the biomass feedstock into the gasifier through an open air inlet and configured to direct the recycled additive feed into injectors configured to direct air into a reaction zone of the gasifier. The additive recycle system further comprises an extraction/removal unit (44) that is configured to remove the second mixture from the gasifier, and a cyclone that is configured to separate the tar cracking additive from the ash. The tar cracking additive is configured to catalyze cracking of tar formed by gasification of the biomass fuel. The additive recycle system comprises a separation vessel that is configured to separate, using a liquid medium, the tar cracking additive from the ash to produce a wet additive recycle stream comprising the liquid medium and the tar cracking additive, and a drying unit that is configured to dry the wet additive recycle stream with heat generated by a stream of producer gas or a stream of exhaust gas generated by an engine of the biomass gasification system. The gasifier comprises a first fixed catalyst bed that comprises a first tar cracking catalyst, and a second fixed catalyst bed that comprises a second tar cracking catalyst. The first fixed catalyst bed is disposed in the reaction zone of the biomass gasifier to crack a first amount of tar within the first mixture to generate a third mixture having a lower tar concentration than the first mixture. The second fixed catalyst bed is disposed in a downstream of the reaction zone and in an updraft section of the biomass gasifier to crack a second amount of tar within the third mixture to generate a fourth gas mixture having a lower tar concentration than the third gas mixture. The charged vessel has an inner wall, and is further configured to receive the second mixture. The first mixture has charged particles resulting from tar cracking. The charged particles comprise ash, cracked molecules, and catalyst molecules. Each charged particle has an electrostatic charge. The electrostatically charged vessel is configured to attract the charged particles to the inner wall to remove the charged particles from the first mixture. The first fixed catalyst bed is configured to crack the tar within the first mixture to produce the second mixture comprising the producer gas and remaining tar. The second fixed catalyst bed is configured to crack the remaining tar within the second mixture. The gasifier further comprises an updraft section that is configured to change a flow direction of the second mixture to direct the second mixture to an outlet of the biomass gasifier, and an inlet (30) that is disposed proximate to the reaction zone and is configured to inject air and the additive into the reaction zone. The second fixed catalyst bed is further disposed within the updraft section.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of a biomass gasification system.    Power generation system (14)    Feedstock preparation system (20)    Inlet of gasifier (30)    Extraction/removal unit (44)    Cycloned gas mixture. (56)