Development of Defense Ceramic Membranes for Hydrogen Separation.

Lee, T. H. ; Zhang, G. ; Dorris, S. E. ; Balachandran, U. ; Rothenberger, K. S. ; Martello, D. V.

Technical Information Center Oak Ridge Tennessee

关键词: Hydrogen separation;    Cermet membranes;    Synthesis gas;    Bulk diffusion;    Development;   

RP-ID  :  DE2001768578

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

We developed novel cermet (i.e., ceramic-metal composite) membranes for separating hydrogen from gas mixtures at high temperature and pressure. The hydrogen permeation rate in the temperature range of 600-900 deg C was determined for three classes of cermet membranes (ANL-1, ANL-2, and ANL-3). Among these membranes, ANL-3 showed the highest hydrogen permeation rate, with a maximum flux of 3.2 cm3/min-cm2 for a 0.23-mm-thick membrane at 900 deg C. Effects of membrane thickness and hydrogen partial pressure on permeation rate indicated that bulk diffusion of hydrogen is rate-limiting for ANL-3 membranes. The lack of degradation in permeation rate during exposure to a simulated syngas mixture suggests that ANL-3 membranes are chemically stable and suitable for long-term operation.