NOVELTY - The system comprises a reactor (12) containing a reactor tube (14) having an internal passage, an entrance (20) to the internal passage and an exit (32) to the internal passage, a unit for compacting a loose biomass material and introducing the compacted biomass material into the entrance of the reactor tube, a unit for heating the compacted biomass material within the reactor tube to a temperature at which organic molecules within the compacted biomass material break down to form ash and a fuel gas mixture, and a unit for withdrawing the fuel gas mixture from the reactor tube.    USE - The system is useful for producing syngas such as carbon monoxide and hydrogen from biomass materials, where the syngas is useful as a fuel source for variety of applications including gas turbines and automotive internal combustion engines and useful to produce methanol, hydrogen and a synthetic petroleum.    ADVANTAGE - The system is capable of efficiently producing the syngas from biomass materials with reduced hazard risks and without any heat loss, minimizes the back-diffusion of the desired syngas product, and eliminates the unwanted leakage of syngas from the ash removal section.    DETAILED DESCRIPTION - The system comprises a reactor (12) containing a reactor tube (14) having an internal passage, an entrance (20) to the internal passage and an exit (32) to the internal passage, a unit for compacting a loose biomass material and introducing the compacted biomass material into the entrance of the reactor tube, a unit for heating the compacted biomass material within the reactor tube to a temperature at which organic molecules within the compacted biomass material break down to form ash and a fuel gas mixture, a unit for withdrawing the fuel gas mixture from the reactor tube, a unit for removing the ash from the reactor tube through the exit of the reactor tube, a unit for inhibiting ingress of air into the reactor tube by sufficiently compacting the biomass material at the entrance of the reactor tube to form a plug of the compacted biomass material at the entrance and compacting the ash at the exit of the reactor tube to form a plug of the ash at the exit, and a unit for injecting a gasification agent into the reactor tube. The inhibiting unit comprises a unit for monitoring pressures at the entrance and the exit of the reactor tube, and a unit for monitoring and adjusting a volumetric rate of the fuel gas mixture withdrawn from the reactor tube by the withdrawing unit based on the pressures at the entrance and the exit of the reactor tube. The reactor tube comprises first and second heating zones through which the biomass material travels in sequence through the reactor tube. The second heating zone has temperature higher than the first heating zone. The gasification agent is steam, and is introduced into the second heating zone within the reactor tube. The compacting unit comprises a hopper (16) containing a quantity of the biomass material, and an auger that transports the biomass material from the hopper to the entrance of the reactor tube. The entrance of the reactor tube is flared to promote compaction of the biomass material within the entrance. The ash removing unit comprises a manifold that tapers to promote compaction of the ash within the exit of the reactor tube. An INDEPENDENT CLAIM is included for a process of producing syngas from biomass materials.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of a biomass gasifier system.    Reactor (12)    Reactor tube (14)    Hopper (16)    Entrance of the tube (20)    Exit of the tube (32)    Ash removal system (34)    Closed-loop control system. (40)