Abstract: The present invention provides for a thermo-chemical reactor vessel having a plurality of planer baffles with an offset and opposing orientation affixed to the interior sides of the vessel. The materials which are to be processed enter the reactor from the top and move downward by gravity and the rate of movement is controlled by the internal configuration of the plurality of planar surfaces. The slope angle of said plurality of planar baffles can be controlled from outside of the vessel. Further, the angle of the interior planar baffles can be changed from horizontal to near vertical. Still further, the plurality of planar baffles can be vibrated using pulsed gas released from beneath the baffle.