Reduction of carbon dioxide from combustion gases by methanization

The paper presents the peculiarities of the introduction of a decarbonation by methanation in the flue gas flow from the energy installations. This decarbonator will have to work at low CO2 concentrations (maximum 10%). The presence of water vapor and oxygen (from excess air) is also mentioned. Methanization decarbonation has been considered for sulphur-free fuels (which play a huge role in catalyst poisoning). A numerical application was made for natural gas fuel. Both an energy installation with water vapor condensation and a classic one with water vapor discharge directly to the flue gas chimney were considered. The economic aspects, of efficiency, refer in particular to the thermal regime of the water from the flue gases which can be in the form of vapours or partial condensation. The formed methane is exposed to combustion (recombustion) in a secondary power plant. The mechanism for reporting the reduction of CO2 emissions as a whole, the main energy installation - the secondary energy installation, which is at least 30%, was also highlighted.