Gasification

A method of gasifying a carbonaceous feedstock, the method including

• pyrolysing a carbonaceous feedstock, by effecting heat exchange between heated gas and the carbonaceous feedstock under non-oxidizing conditions through direct and/or indirect contact between the heated gas and carbonaceous feedstock, and thus producing a pyrolysis gas and a solid pyrolysed product;
• gasifying the solid pyrolysed product, thus producing syngas;
• producing heat of combustion by combusting at least some of the syngas and/or hydrogen recovered from the syngas;
• effecting heat exchange between the heat of combustion and the pyrolysis gas, to produce heated pyrolysis gas;
• and
• using the heated pyrolysis gas to provide at least some of the heat to perform the pyrolysis of the carbonaceous feedstock, until such time as the heat obtained from the heated gas is at least partly or ultimately replaced by the heat obtained from the heated pyrolysis gas.