This study examines the hydrogen production by the steam reforming of methane integrated to chemical-looping reforming (CLR) as a novel technology in a fixed-bed reactor at 700−1200 °C. The particles are present in two consecutive oxidation and reduction steps. In the reduction step, the oxygen carrier is reduced with the fuel, which, in turn, is partially oxidized to H 2 and CO (synthesis gas), and in the oxidation step, the reduced oxygen carrier is reoxidized with oxygen (O 2 + argon). The oxygen carriers Fe, Mn, Co, and Cu using inert materials Al 2 O 3 and TiO 2 as a support are prepared by the precipitation method. The samples are analyzed using energy-dispersive X-ray analysis (EDX), scanning electron microscopy (SEM), and X-ray diffraction (XRD) to check the carrier specifications before and after the process. The main goal of this study is investigation of the reactivity of different metal oxides on Al 2 O 3 and TiO 2 support. The conversion of fuel into products depends upon the type of oxygen carriers and experimental conditions. All of the oxygen carriers show favorable hydrogen production over the 3 cycle experiments at optimum temperature. Among used metals, Fe has the highest hydrogen yield. The optimum temperature for maximum conversion of methane over Fe-, Mn-, Co-, and Cu-based carriers is nearly 1025, 1030, 900, and 800 °C, respectively. According to experimental results, at higher temperatures, Fe-and Mn-based carriers have better performance, but at lower temperatures, the Cu-based carrier is more efficient compared to other carriers. The comparison of supports represents that the reactivity of Al 2 O 3 is better than TiO 2 , so that the conversion of the fuel over Fe/Al 2 O 3 is 95−100% in comparison to Fe/TiO 2 , which is 78−80%.
