System and method for water-based chemical-looping hydrogen generation

A method for water-based chemical-looping hydrogen generation, comprising a water-based reduction process of oxygen carrier and a water-based oxidation process of oxygen carrier, wherein:

• in the water-based reduction process of oxygen carrier, an oxygen carrier is reduced with a hydrocarbon fuel in the presence of a steam to produce a hydrogen gas as well as a reduced oxygen carrier and a carbon dioxide, wherein the oxygen carrier is selected from one or more of porous Fe2O3/Al2O3, porous NiO/NiAl2O4 and porous LaCu0.1Ni0.9O3, and the carbon dioxide is absorbed with a carbon dioxide absorbent to facilitate production of the hydrogen gas, and the absorbed carbon dioxide is desorbed after the reaction is ended, wherein a reaction temperature in the water-based reduction process of oxygen carrier is 300-550° C., and the carbon dioxide absorbent is lithium orthosilicate and/or a hydrotalcite-like compound;
• and
• in the water-based oxidation process of oxygen carrier, the reduced oxygen carrier is oxidized with a steam to produce a hydrogen gas, while the reduced oxygen carrier is oxidized to its original state, thereby forming a chemical-looping.