关键词: 乙醇, 氧化铝, 乙醛, Ｘ射线衍射分析, 脱氢, 陶瓷, 扫描电子显微镜, 钯, 复合薄膜

Alumina membrane which included palladium indignent was prepared by the sol-gel method. Dehydrogenation of ethanol to acetaldehyde was carried out in this Pd-Al2O3 membrane reactor; and the yield of acetaldehyde was higher than that in the pure Al2O3 membrane. The average pore diameter of the Pd-Al2O3 membrane was 5-6nm, within the range that a Knudsen process acts. But the separation factor of H2/Ar was higher than Knudsen value, this suggested the increase of the selectivity of permeation of H2. This Pd-Al2O3 membrane was also characterized by XRD and SEM.

Key words: ETHANOL, ALUMINIUM OXIDE, ACETALDEHYDE, X-RAY DIFFRACTION ANALYSIS, DEHYDROGENATION, CERAMICS, SCANNING ELECTRON MICROSCOPES, PALLADIUM, LAMINATED FILMS