Sabatier based CO2-methanation of Flue Gas Emitted by Conventional Power Plants

The hydrogenation CO2 + 4H2 ->CH4 + 2H2O discovered by Paul Sabatier nowadays is discussed as “Power-to-Gas” approach to utilize excess energy from renewable electricity generation. In a laboratory scale, we investigate the Sabatier process in a simulated flue gas atmosphere of conventional base load power plants. The reaction is investigated with regard to conversion rates, yield, selectivity and long-term stability. Using a catalyst based on nickel, we extract selectivities near 100% with a conversion around 85%. Beside the influence of oxygen, we investigate further typical contaminations like NO2 and SO2.