| 以氨水和碳酸铵为沉淀剂制备氧化铝的对比研究 |
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| 引用本文： | 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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| 作者姓名： | 刘 华 史忠华 陈耀强 赵 彬 龚茂初 |
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| 作者单位： | 1. 四川大学化学学院,成都,610064
2. 四川大学化学学院,成都,610064;四川轻化工学院,自贡,643000 |
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| 基金项目： | 国家自然科学基金重点基金资助项目(No.20333030) |
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| 摘 要： | γ-Al2O3，是一种常用的催化剂载体，它具有比表面大和价廉易得等优点。但对于很多高温反应体系，如汽车尾气催化净化，其热稳定性在很大程度上影响了汽车尾气净化催化剂的活性和稳定性，因此提高γ-Al2O3的高温热稳定性对保持汽车尾气净化催化剂的反应活性、延长催化剂的使用寿命非常重要。
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| 关 键 词： | 氧化铝 沉淀剂 片钠铝石 稳定性 密偶催化剂 |
| 修稿时间： | 2003-10-22 |
The Comparison of Aluminas Prepared by Ammonium Carbonate and Ammonium Hydroxide as Precipitating Agents |
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| LIU Hu,SHI Zhong-Hu,CHEN Yao-Qiang,ZHAO Bin and GONG Mao-Chu. The Comparison of Aluminas Prepared by Ammonium Carbonate and Ammonium Hydroxide as Precipitating Agents[J]. Chinese Journal of Inorganic Chemistry, 2004, 20(6): 688-692 |
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| Authors: | LIU Hu SHI Zhong-Hu CHEN Yao-Qiang ZHAO Bin GONG Mao-Chu |
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| Affiliation: | College of Chemistry, Sichuan University, Chengdu 610064,College of Chemistry, Sichuan University, Chengdu 610064,College of Chemistry, Sichuan University, Chengdu 610064,College of Chemistry, Sichuan University, Chengdu 610064;Sichuan Institute of Light Industry and Chemical Technology, Zigong 643000 and College of Chemistry, Sichuan University, Chengdu 610064 |
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| 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. |
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| Keywords: | alumina precipitating agent NH4Al(OH)2CO3 stability close-coupled catalyst |
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