Abstract:The La0.6S0.4Co0.2Fe0.8O3-δ(LSCF)powders were prepared by the sol-gel method, and then calcined at high temperature. The polyethersulfone(PESf) was dissolved by using N-methyl pyrrolidone(NMP)as solvent, and the powders were added to stir to obtain a fluid casting film. The hollow fiber membranes were prepared by the phase inversion-sintering technology, and sintered at high temperature to obtain a porous hollow fiber membrane with perovskite structure. The eutectic is prepared by mixing the carbonates according to a certain ratio, and the hollow fiber membrane is impregnated under high temperature melting conditions for several minutes to prepare a dual-phase membrane. The membrane has two phases, namely an oxide phase and a carbonate phase. At high temperature, the carbonate phase can be conducted through carbonate ions, while the cations are transmitted through the perovskite phase, thereby completing the separation of CO2. Through the simulation of the flue gas, the prepared dual-phase membrane was installed in a self-made reactor, and helium gas was passed into the membrane as the purge gas and the flue gas as the raw gas, and the tail gas was monitored online by gas chromatography. Then calculated to calculate the high-temperature permeability of CO2. The experimental results show that the maximum permeability at 850℃ is 1.221mL/( cm2.min), which provides a new idea for the treatment of flue gas in thermal power plants.