Hot solids gasifier with CO

4 4 44 22 22 3 3 3 2 A gasifier includes a first chemical process loop having an exothermic oxidizer reactor and an endothermic reducer reactor . CaS is oxidized in air in the oxidizer reactor to form hot CaSOwhich is discharged to the reducer reactor . Hot CaSOand carbonaceous fuel received in the reducer reactor undergo an endothermic reaction utilizing the heat content of the CaSO, the carbonaceous fuel stripping the oxygen from the CaSOto form CaS and a CO rich syngas. The CaS is discharged to the oxidizer reactor and the syngas is discharged to a second chemical process loop . The second chemical process loop has a water-gas shift reactor and a calciner . The CO of the syngas reacts with gaseous HO in the shift reactor to produce Hand CO. The COis captured by CaO to form hot CaCOin an exothermic reaction. The hot CaCOis discharged to the calciner , the heat content of the CaCObeing used to strip the COfrom the CaO in an endothermic reaction in the calciner, with the CaO being discharged from the calciner to the shift reactor