| 以氨水和碳酸铵为沉淀剂制备氧化铝的对比研究 |
| The Comparison of Aluminas Prepared by Ammonium Carbonate and Ammonium Hydroxide as Precipitating Agents |
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| 摘要: |
| 关键词: 氧化铝 沉淀剂 片钠铝石 稳定性 密偶催化剂 |
| 基金项目: |
| Abstract: Aluminas were prepared by precipitation of aqueous aluminum nitrate solution using ammonium carbonate and ammonium hydroxide as precipitation agent respectively. The prepared samples were characterized by TG/DTA, XRD, surface area, pore volume and average pore diameter and the results were compared. The activity and stability of the close-coupled catalysts supported by aluminas prepared by different precipitating agent were compated. The alumina formed by ammonium carbonate showed larger surface area, pore volume, average pore diameter, higher thermal stability and better support property than that formed by ammonium hydroxide. The precusor of NH4Al(OH)2CO3 in the ammonium cabonate process was responsible for the difference. |
| Keywords: alumina precipitating agent NH4Al(OH)2CO3 stability close-coupled catalyst |
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| 刘 华,史忠华,陈耀强,赵 彬,龚茂初.以氨水和碳酸铵为沉淀剂制备氧化铝的对比研究[J].无机化学学报,2004,20(6):688-692. |
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