“…A brief schematic of the four chemical looping processes is given in Figure 30: In the reforming process (GSR), a natural gas fuel is converted to a syngas stream, as opposed to a complete fuel conversion occurring in combustion. The syngas produced can be later employed as feedstock for flexible H2 production in a WGS unit or electricity in a combined cycle [55]. In the water splitting process, an additional steam stage is used to obtain H2, while attaining full conversion of the fuel in the reduction reactor using an iron oxide oxygen carrier.…”