采用相转化/烧结技术制备了致密的Bi1.5Y0.3Sm0.2O3-La0.8Sr0.2MnO3–d双相复合陶瓷中空纤维膜. 所得的中空纤维膜具有非对称结构, 靠近膜管内表面部分是指状孔结构, 而靠近膜管外表面则是非常致密的结构. 中空纤维膜的内部尾端的氧气含量与膜管内外的氧分压、纤维膜的长度等有很大的关系. 由于随着氧气的渗透, 膜管内的氧分压沿轴向是增大的, 可以将膜管均分为n段, 采用活塞式流动模型结合Wagner氧渗透理论对双相复合中空纤维膜的氧渗透过程进行了模拟, 模拟结果和实测的相符合, 对于估算膜组件的氧气生产能力具有很好的指导意义.
Dense Bi1.5Y0.3Sm0.2O3 (BYS)-La0.8Sr0.2MnO3–d(LSM) hollow fiber membrane was fabricated by the combined phase inversion/sintering technique. The hollow fiber possesses an asymmetric structure: a finger-like porous structure near the inner surface and a dense layer near the outer surface. The outlet oxygen content is related to the oxygen partial pressure on the core and shell side and the length of the hollow fiber. Because the oxygen partial pressure on the permeated side increases along the axis, the hollow fiber is evenly divided into n segments. The oxygen permeation process is simulated by a plug flow model in combination with the Wagner theory. The simulation results are consistent with the measured results, which is a good guide for estimating oxygen production capacity of membrane components.
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