Coaxially stacked coaxial fuel gasifier

A gasification system comprising:

• a coaxially integrated gasification furnace, wherein the coaxially integrated gasification furnace comprises:
• a gasification chamber fluidly coupled to a gasification cyclone separator;
• a char combustion chamber fluidly coupled to a combustion cyclone separator, wherein the char combustion chamber is located within the gasification chamber;
• a settling isolation chamber having a first partition and a second partition, wherein the first partition separates the settling isolation chamber from the combustion chamber, and the second partition separates the settling isolation chamber from the gasification chamber;
• and
• at least a temperature control element disposed on the settling isolation chamber
• an air supply line fluidly coupled to the gasification chamber, the char combustion chamber, and the settling isolation chamber;
• a steam supply line fluidly coupled to the gasification chamber, the char combustion chamber, and the settling isolation chamber;
• and
• one or more valves fluidly coupled to the air supply line or the steam supply line.

A method of gasifying a fuel source, the method comprising:

• heating a fluidizing medium in a gasification chamber, a char combustion chamber, and a settling isolation chamber of a gasification system to a temperature of about 500° C. to about 1000° C. by introducing a steam;
• injecting a fuel source to the gasification chamber;
• gasifying the fuel source by contacting the fuel source with the fluidizing medium in the gasification chamber;
• obtaining a product gas from the gasification chamber;
• directing a residual carbonized char and a portion of the fluidizing medium to an overflow chute of the gasification chamber, the overflow chute fluidly coupled to the char combustion chamber;
• heating the residual carbonized char and at least a portion of the fluidizing medium in the char combustion chamber;
• obtaining an exhaust gas from the char combustion chamber;
• collecting the portion of the fluidizing medium in the settling isolation chamber;
• and
• directing the portion of the fluidizing medium in the settling isolation chamber to the gasification chamber by flowing one or more gases from an air supply line to the settling isolation chamber or the char combustion chamber.