Preliminary Study on Hydrogen Permeation and Stability of BaCe0.90Y0.10O3-δ Membrane under Asymmetric Atm osphere

摘要：

@@High-temperature proton conductors (HTPC) have been extensively studied since I wahara et al?1? reported protonic conduction in SrCeO3-based oxid es. Later, the BaCeO3-based oxides, such as BaCe0.90Yb0.10O3- d (BCYb10) and BaCe0.90Y0.10-O3-d (BCY10), we re fou nd to show higher conductivity?2?. High electronic and protonic conducti vity makes BCY10 a potential membrane for hydrogen separation?3?. Thin f ilms with high density, most probably made by sequential coating on porous subst rates, are imperative in order to promote hydrogen permeation flux?4?. T his makes it more necessary for such membranes to be kept stable and unspoilt un der asymmetric hydrogen-permeation atmosphere at elevated temperatures. In this paper, the stability and hydrogen permeation ability of BCY10 membrane are stud ied by XRD, SEM, energy dispersive X-ray (EDX) analysis, H2-TPR process and hydrogen permeation experiment. The results showed that hydrogen cannot permeate through the BCY10 membrane without surface modification, and its surface cannot keep a uniform perovskite structure in the asymmetric atmosphere.

机标关键词：Hydrogen Permeation、hydrogen permeation、surface modification、perovskite structure、hydrogen separation、proton conductors、permeation flux、high density、in order

所属期刊栏目：22

分类号：TG1;O48

资助基金：国家重点基础研究发展计划973计划G1999022401

在线出版日期：2004-01-08（万方平台首次上网日期，不代表论文的发表时间）

页数：共2页

页码：5-6