| 制备方法对镧钡共改性氧化铝性能的影响 |
| Effect of Preparation Methods on Property of La, Ba Co-modified Alumina |
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| 摘要: |
| 关键词: 氧化铝 氧化钡 氧化镧 制备方法 |
| 基金项目: |
| Abstract: The effect of preparation method on the properties of alumina modified by La2O3 and BaO was investigated by means of Low temperature nitrogen adsorption-desorption, NH3-TPD, NO-TPD and XRD. The results show that alumina prepared by peptizing method exhibits the best textural properties, alumina obtained by co-precipitation method presents the strongest surface acidity and alumina derived from impregnation method shows the best ability of NO adsorption. After calcination at 1 100 ℃, all alumina except that from impregnation method have excellent thermal stability. When the specific surface area and pore volume of alumina are large enough, the activity of catalyst Pd/alumina is affected primarily by the surface acidity of alumina. |
| Keywords: alumina BaO La2O3 preparation method |
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| 董文萍,张丽娟,温怡芸,陈耀强,龚茂初.制备方法对镧钡共改性氧化铝性能的影响[J].无机化学学报,2008,24(6):998-1002. |
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