Proton conducting perovskite hollow fibre membranes with surface catalytic modification for enhanced hydrogen separation

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• 作者：Jian Song^a ; Jian Kang^b ; Xiaoyao Tan^a ; ^{tanxiaoyao@tjpu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Bo Meng^c ; Shaomin Liu^b ; ^{shaomin.liu@curtin.edu.au" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Perovskite membrane ; Hollow fibre ; Hydrogen separation ; Surface modification
• 刊名：Journal of the European Ceramic Society
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：36
• 期：7
• 页码：1669-1677
• 全文大小：3790 K

文摘

BaCe_0.85Tb_0.05Co_0.10O_3−δ (BCTCo) perovskite hollow fibre membranes were fabricated by a combined phase-inversion and sintering technique. The hollow fibre surfaces were modified by coating Ni or Pd particles. Hydrogen permeation fluxes at 700–1000 °C can be improved due to the surface modification from the original 0.009–0.164 mL(STP) cm⁻² min⁻¹ to 0.018–0.269 mL cm⁻² min⁻¹ for the Ni-coated membranes with maximum improvement by 64%, and to 0.1–0.42 mL cm⁻² min⁻¹ for the Pd-loaded membranes with maximum enhancement by 155%, respectively. Loading of the catalyst on the hollow fibre outer surface is better than on the inner surface, but coating on both sides may enhance the hydrogen permeation most effectively. The permeation enhancement depends on both the catalyst loading amount and its structure, which can be controlled by the plating conditions. The optimal Pd loading and coverage should be around 0.667 mg cm⁻² and 82%, respectively for maximizing the permeation improvement.