a sufficient flow rate to diminish any amount of oxygen passing through the gap 56 and into the enclosure 60 similarly before solid pyrolysate sp is located within the discharge chute 150 the enclosure 60 is in fluid communication with the outside environment through the discharge auger 152 cross sectional areas of the discharge auger 152 and gap 56 are selected to be small enough that nitrogen gas provided by the nitrogen inlet 180 can provide positive gas flow out of the enclosure 60 until steady state operation of the system 10 can be achieved influx material m is then loaded into the in feed hopper 30 and the influx auger 20 is activated by the motor 22 causing the influx material m to be drawn up the influx auger 20 and into the influx shaft 40 as influx material m collects over the rollers 50 within the influx shaft 40 a flow of gas out of the enclosure 60 is decreased this increases flow of gas out of the enclosure 60 through the discharge auger 152 or an amount of nitrogen gas supplied through the nitrogen inlet 180 can be reduced once a sufficient amount of influx material m has collected above the feed rollers 50 the feed motor 52 can.