<scp>One‐step</scp> thermal processing of <scp>BaCe<sub>0</sub></scp><sub>.</sub><scp><sub>8</sub>Y<sub>0</sub></scp><sub>.</sub><scp><sub>2</sub>O<sub>3</sub></scp><sub>−<i>δ</i></sub> hydrogen permeable <scp>multichannel</scp> hollow fiber membrane
Tianlei Wang, Zheng Fan, Shoufei Wang, Qiankun Zheng, Jinkun Tan, Zhengkun Liu, Guangru Zhang, Wanqin Jin
Abstract
Abstract 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.