The ever-increasing demand for energy is generating a consequent increase of the energy production in the years to come. This currently comes mostly from power plants that use fossil fuels as their main fuel. Natural gas or coal-based power plants continue to improve from the point of view of efficiency, reducing emissions and wastes per unit of energy more and more. With a view to following international agreements in limiting the rise in global average temperatures, mitigation actions against CO2 emissions are becoming increasingly fundamental. Carbon capture and further uses are one of the leading themes of scientific research, especially when retrofitting pre-existing plants.