Apparatus and method for solid fuel chemical looping combustion

A method of chemical looping combustion comprising:

• placing an oxygen uncoupling oxygen carrier into an oxygen carrier section of a fuel reactor;
• inserting a solid carbonaceous fuel into a fuel section of the fuel reactor;
• producing an MexOy oxidized carrier by establishing the oxygen uncoupling oxygen carrier at a reducing temperature and maintaining a partial pressure of oxygen in the oxygen carrier section below the equilibrium partial pressure of oxygen over the oxygen uncoupling oxygen carrier at the reducing temperature, thereby generating gaseous oxygen and the MexOy oxidized carrier in the oxygen carrier section of the fuel reactor;
• utilizing some portion of the solid carbonaceous fuel to generate gases comprising CO and generate an ash residue;
• moving the gaseous oxygen through a porous divider separating the fuel section of fuel reactor and the oxygen carrier section of the fuel reactor from the oxygen carrier section of the fuel reactor to the fuel section of the fuel reactor while migrating the gases comprising CO from the fuel section of the fuel reactor to the oxygen carrier section of the fuel reactor and contacting the gases comprising CO and the MexOy oxidized carrier in the oxygen carrier section of the fuel reactor;
• heating the MexOy oxidized carrier to a temperature sufficient to generate a reduction reaction with the gases comprising CO, where the reduction reaction reduces the MexOy oxidized carrier to a reduced carrier and generates combustion gases comprising CO2, and where the temperature is less than he melting temperature of the oxygen carrier and less than the melting temperature of the reduced carrier, thereby generating the reduced carrier and the combustion gases:
• causing a combustion reaction in the fuel carrier section of the fuel reactor between another portion of the solid carbonaceous fuel and the gaseous oxygen and generating additional combustion gases comprising CO2 and an additional ash residue;
• removing the combustion gases comprising CO2 and the additional combustion gases comprising CO2 from the fuel reactor;
• and
• displacing the ash residue and the additional ash residue from the fuel section of the fuel reactor.