【摘要】 介绍了粉末状纤维氧化铝的合成方法,考察了主要制备因素对合成的影响,着重讨论了焙烧温度与晶形、晶相、表面结构等的关系,并观察了将其应用于催化反应和色谱分析中的初步结果。实验表明,当温度控制在80—98℃时,能得到直径为0.1μ的粉末状氧化铝纤维,按制备用原料的不同,其比表面为125—345m²/g,孔体积为0.16—0.37ml/g。实验发现,焙烧温度在300—900℃范围内都是η—Al₂O₃,在1100℃时才变成α-Al₂O₃。焙烧温度对表面性质也有明显影响。应用初探表明,将其用于氢气中脱O₂,当残氧量为0.1—0.3ppm,其空速可达10×10⁴ml/g·h;将其用作毛细菅色谱柱固定相以分析分离C₁—C₅气态烃时,26个峰在30min之内即可出完,柱效可达5830plate/m。更多还原

【Abstract】 The micro-fibrillar alumina A and B having Bayerite structure were prepared from different reagent in 80—98℃.The effect of calcining temperature on the feature, structure, surface area and acidity were studied.This alumina was used as support of the catalyst for remove oxygen from H₂.The catalytic property was good especially the space velocity could be raised to 10 times that of granular A1₂O₃. The performance of capillary chromatographic column prepared from this fibrillar alumina showed good performance for separating C₁-C₅, and pyrolysis gas. The column efficiency was as high as 5830 plate/m （taking hexene as standard）.更多还原