One‐step thermal processing of BaCe 0 . 8 Y 0 . 2 O 3 − δ hydrogen permeable multichannel hollow fiber membrane

• Published in: AIChE journal 2022-06, Vol.68 (6)
• Main Authors: Wang, Tianlei, Fan, Zheng, Wang, Shoufei, Zheng, Qiankun, Tan, Jinkun, Liu, Zhengkun, Zhang, Guangru, Jin, Wanqin
• Format: Article
• Language: English
• ISSN: 0001-1541; 1547-5905
• DOI: 10.1002/aic.17607

BaCe 0.8 Y 0.2 O 3− δ (BCY) is the most widely studied proton‐conducting material and is frequently fabricated as a dense membrane for hydrogen separation. However, the limitation of preparing dense BCY membranes is the extremely high sintering temperature (>1500°C). Herein, the BCY 7‐channel hollow fiber membrane was prepared by a one‐step thermal processing (OSTP) with Co 2 O 3 as a sintering aid. The results showed that the addition of 1 wt.% Co 2 O 3 at a reduced temperature of 1350°C was the optimum composition and sintering condition for densification and forming a single perovskite‐phase structure. The hydrogen permeation flux of the BCY hollow fiber membrane reached up to 0.34 ml min −1  cm −2 at 900°C. The long‐term stability test was conducted for 300 h. The successful attempt of such a strategy provides a green and straightforward path for the preparation of dense ceramic proton‐conducting membranes on a large scale. This promotes its industrial application in high‐temperature hydrogen separation.