Disclosed are a method and device for using CO2 mineralization to produce
sodium bicarbonate or
sodium carbonate and output
electric energy. The device comprises an
anode area, an intermediate area, and a
cathode area. The
anode area and the intermediate area are spaced by a negative
ion exchange membrane (2). The intermediate area and the
cathode area are spaced by a positive
ion exchange membrane (3). The
anode area, the intermediate area, and the
cathode area can accommodate corresponding electrolytes. An anode
electrode (1) is disposed in the anode area, a
cathode electrode (4) is disposed in the cathode area, and the
cathode electrode and the anode
electrode are connected through a circuit. A
raw material hydrogen gas inlet is disposed in the anode area, and a CO2 inlet and a product
hydrogen gas outlet are disposed in the cathode area. The method is based on the principle of CO2 mineralization and utilization, combines the membrane
electrolysis technology, facilitates
spontaneous reaction by using the acidity of CO2 and the
alkalinity of the reaction solution and realizes separation of the products, and converts through a membrane
electrolysis apparatus the energy released by the reaction into
electric energy at the same time when producing the
sodium bicarbonate or
sodium carbonate and outputs the
electric energy. The method and device have low
energy consumption, high
utilization rate of raw materials and little environmental
pollution, and can output electric energy while producing
sodium carbonate at the same time.