CO₂-Tolerant SrFe_0.8Nb_0.2O_3-δ-Carbonate Dual-Phase Multichannel Hollow Fiber Membrane for CO₂ Capture

Ceramic-carbonate dual-phase membranes have attracted a lot of attention because of the emission of CO₂ and environmental problems. In this study, a dense SrFe_0.8Nb_0.2O_3-δ-carbonate dual-phase multichannel hollow fiber membrane has been successfully prepared via a phase inversion-sintering technique and impregnation. The morphology, crystal structure, phase stability, breaking load, and CO₂ permeation flux of the as-prepared membranes were systematically investigated. The membrane not only had a higher CO₂ permeation flux but also was of good thermomechanical stability in thermal recycles. Meanwhile, the membrane can be operated stably at 973 K over 200 h without any degradation of CO₂ permeation flux. Our work demonstrates that the ceramic-carbonate dual-phase mixed-conducting multichannel hollow fiber membrane is a promising candidate for postcombustion CO₂ capture.