表面涂覆对BaCo_(0.7)Fe_(0.2)Nb_(0.1)O_(3-δ)透氧膜耐CO_2腐蚀性能的影响

Effect of SSC coating on the oxygen permeability of BaCo_(0.7)Fe_(0.2)Nb_(0.1)O_(3-δ) membrane under CO_2-containing atmosphere

利用固相合成法制备了表面涂敷多孔Sm0.7Sr0.3CoO3-δ(SSC)材料的BaCo0.7Fe0.3-x Nbx O3-δ(BCFN)钙钛矿透氧膜片,研究了SSC涂覆对BCFN膜材料透氧量及其结构稳定性的影响。研究发现,表面涂覆多孔SSC可明显提高BCFN透氧膜的抗CO2腐蚀性能。无涂覆的BCFN在5%CO2吹扫条件下透氧60h后透氧量降低了85%,而在同样条件下对BCFN进行表面涂覆改性后透氧量仍可达1.3 mL/cm2·min,透氧率降低约31%。

Porous Sm0.7Sr0.3CoO3-δ(SSC)coated BaCo0.7Fe0.3-xNbxO3-δ(BCFN)perovskite membrane was prepared by solid phase reaction method,and the effect of SSC coating on the oxygen permeability of BaCo0.7Fe0.2Nb0.1O3-δ membrane under CO2-containing atmosphere was systematically studied.The results demonstrate that the porous SSC coating enhances the oxygen permeability of BCFN under CO2-containing atmosphere.The oxygen permeation flux of non-coated BCFN membrane using 5% CO2 as sweep gas is decreased by 85%after 60 h test,whereas the oxygen flux of SSC-coated BCFN membrane is only decreased by 31% at the same condition,which is still 1.3mL/cm2·min.