NANOSTRUCTURED ALUMINA CERAMIC MEMBRANES FOR GAS SEPARATION
Nanostructured alumina ceramic templates have been fabricated by anodizing annealed high-purity aluminium foil. Pore diameter, pore separation and thickness in these alumina ceramics can be controlled using a range of acid electrolytes and anodizing voltage profiles. Thermal development of the structure of these robust and optically clear templates have been compared using XRD, thermal analysis and 27A1 MAS NMR techniques, showing that species substituted in the alumina lattice from decomposition of the acid electrolyte play a major role in determining the chemical and physical stability of the ceramic template at elevated temperatures. Deposition of ultrathin palladium films on the surface of these alumina templates creates robust membranes that enable hydrogen separation from mixed gas streams at elevated temperatures. Gas permeability measurements through these membranes as a function of temperature have demonstrated their very high selectivity for hydrogen.
Nanostructure alumina ceramic membrane hydrogen
IAN BROWN MARK BOWDEN TIM KEMMITT JEREMY WU JULES CARVALHO
MacDiarmid Institute for Advanced Materials & Nanotechnology, Industrial Research Ltd., PO Box 31310 Department of Materials, Imperial College, Exhibition Road, South Kensington, London, UK
国际会议
第五届先进材料与加工国际会议(Fifth International Conference on Advanced Materials and Processing ICAMP-5)
哈尔滨
英文
1015-1020
2008-09-03（万方平台首次上网日期，不代表论文的发表时间）