Method for controlling the peak temperature of a fluid gasification zone

A method for controlling the temperature of a gasification zone having a top section and a bottom section and which is designed for converting carbonaceous materials, having an inorganic fraction and an organic fraction, to a syngas:

• a) maintaining a fluidized bed of solids in said gasification zone by use of a fluidizing gas introduced through a plurality of nozzles located at the bottom section of said gasification zone wherein said nozzles having a partial oxidation zone and wherein said gasification zone is operated under net reducing conditions;
• b) maintaining said fluidized bed at effective gasification temperatures;
• c) pulsing oxygen, through one or more of said plurality of nozzles at effective pulsing conditions to maintain the partial oxidation zone of said nozzles below the fusion temperature of at least a fraction of said inorganic fraction of said carbonaceous material.