Method and system for producing syngas from a combustible material

A method of producing a gas from a combustible material,

• comprising:
• (a) loading the combustible material into a containment structure having a first side and a second side arranged along either side of an elongate axis;
• (b) substantially sealing the containment structure;
• (c) feeding an oxidant via an oxidant injection point into the sealed containment structure and igniting the combustible material;
• (d) moving the oxidant injection point from one end to the other end of the containment structure;
• (e) controlling a flow rate of oxidant and a rate of movement of the oxidant injection point such that the combustible material is partly converted, thereby leaving behind thermally affected layers of combustible material in the sealed containment structure after the injection point has passed through the material;
• (f) cooling and purging the sealed containment structure;
• (g) unsealing the sealed containment structure to load fresh combustible material on top of the top-most thermally affected layer left behind after completing (c) to (e), wherein during (e) at least some of the combustible material is converted into at least one of molten slag and char that accumulates as the bottom-most thermally affected layer and subsequently cools and solidifies;
• discharging at least one of solid slag and of char in the bottom-most thermally affected layer from under material that remains in the containment structure to remove at least one of the solid slag and the char from the containment structure;
• and
• (h) repeating (a) to (g).