Oxygen Permeation through U-Shaped K2NiF4-Type Oxide Hollow-Fiber Membranes

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• 作者：Yanying Wei ; Jun Tang ; Lingyi Zhou ; Zhong Li ; Haihui Wang
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2011
• 出版时间：November 16, 2011
• 年：2011
• 卷：50
• 期：22
• 页码：12727-12734
• 全文大小：1057K
• 年卷期：v.50,no.22(November 16, 2011)
• ISSN：1520-5045

文摘

The first oxygen permeation data for a dense hollow-fiber membrane based on a K₂NiF₄-type oxide are reported. The U-shaped (Pr_0.9La_0.1)₂(Ni_0.74Cu_0.21Ga_0.05)O_4+未 (PLNCG) hollow-fiber membranes were prepared by a phase-inversion spinning process. The dependences of the oxygen permeation on the feed air flow rate, sweep helium flow rate, oxygen partial pressure on the shell side, and operating temperature were experimentally investigated. The effects of the bulk diffusion and the surface exchange on the oxygen permeation flux through the U-shaped PLNCG hollow-fiber membranes are also discussed. During around 320 h of operation, a steady oxygen permeation flux of 1.0 mL/(min路cm²) was obtained at 975 掳C under conditions of an air feed flow rate of 180 mL/min and a helium sweep flow rate of 55 mL/min. XRD and SEM analyses of the spent hollow-fiber membrane showed the good stability of the U-shaped PLNCG hollow-fiber membranes.