(558ck) Thermocatalytic Splitting of CO2 into Fuels Using Sol-gel Derived Ni-Mg-Ferrite

It is highly important to work towards the reduction in the excessive discharge of CO₂ and also the utilization of the liberated CO₂ towards value added products. Recently, we have identified that the catalytic Mg-ferrite materials were capable of producing CO from CO2 via solar driven thermochemical cycle. This produced CO can be combined with the H₂ produced from the water splitting reaction for the production of syngas, which can be further processed to liquid fuels via the Fischer-Tropsch process. In this study, attempts were made to improve the redox reactivity of the Mg-ferrite based catalytic materials by incorporating the Ni in the crystal structure. The synthesis of Ni-doped Mg-ferrite was achieved by employing the so-gel method. The derived Ni-Mg-ferrites were further characterized to identify the phase composition, morphology, surface area, and other physico-chemical properties. The derived materials were further tested towards multiple thermochemical CO2 splitting cycles using a thermogravimetric analyzer (TGA). The Ni-Mg-ferrite catalytic powder was thermally reduced at 1400^oC, while the CO₂ splitting reaction was performed at lower temperatures (800 to 1100^oC). O₂ and CO release was further monitored by gas chromatography. In addition to the redox reactivity, the kinetics associated with the thermochemical conversion of CO2 using the Ni-Mg-ferrite catalytic materials was also investigated. The obtained results will be presented in detail in this poster contribution.