The persistent rise of the average temperature of the Earth shows that global warming is an obvious fact. This is connected to increasing greenhouse gas (GHG) emissions, pollution and the resulting climate changes, causing alterations to the environment. All this can be traced back to the use of fossil fuels as the world’s main energy source. One alternative to counteract global warming is to investigate technologies for capturing CO2 already generated by current fossil fuel energy systems and develop methods to convert CO2 into useful chemicals or combustible gases. Among the possible methods, one of the most promising is the chemical looping process composed of two-step thermochemical cycles for CO2 conversion to syngas.