| 拟薄水铝石结构对γ-氧化铝水热稳定性的影响 |
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| 引用本文： | 李翠,刘化章,陈珍珍,李瑛.拟薄水铝石结构对γ-氧化铝水热稳定性的影响[J].工业催化,2014,22(10):751-755. |
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| 作者姓名： | 李翠 刘化章 陈珍珍 李瑛 |
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| 作者单位： | 浙江工业大学工业催化研究所，浙江 杭州 310032 |
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| 基金项目： | 国家自然科学基金(20803064)资助项目；浙江省自然科学基金 |
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| 摘 要： | 氧化铝作为常用工业催化剂载体，其水热稳定性对催化剂寿命起至关重要作用。采用N2吸附、扫描电镜、X射线衍射、傅里叶红外光谱和NH3-TPD等对拟薄水铝石经800 ℃(升温速率10 ℃·min-1)焙烧4 h得到的氧化铝及水热处理后的氧化铝结构进行表征，研究拟薄水铝石结构对γ-Al2O3水热稳定性的影响。结果表明，拟薄水铝石前驱体结晶程度越好，焙烧所得γ-Al2O3的表面羟基越少，酸性越弱，水热稳定性越好。
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| 关 键 词： | 催化化学 拟薄水铝石 γ-氧化铝 水热稳定性 |
Effect of pseudo-boehmite structure on hydrothermal stability of γ-Al2 O3 |
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| LI Cui,LIU Huazhang,CHEN Zhenzhen,LI Ying.Effect of pseudo-boehmite structure on hydrothermal stability of γ-Al2 O3[J].Industrial Catalysis,2014,22(10):751-755. |
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| Authors: | LI Cui LIU Huazhang CHEN Zhenzhen LI Ying |
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| Affiliation: | Institute of Industry Catalysis, Zhejiang University of Technology, Hangzhou 310032, Zhejiang, China |
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| Abstract: | Aluminum oxide has been widely used as the support for industrial catalysts, and its hydrothermal stability plays a critical role in the catalyst lifetime. The effect of pseudo-boehmite structure on hydrothermal stability of γ-Al203 obtained from pseudo-boehmite after calcination at 800 ℃ （heating rate 10 ℃ · min -1 ） for 4 h was investigated. The structure of alumina before and after hydrothermal treatment was characterized by N2 adsorption-desorption, SEM, XRD, FF-IR and NH3-TPD. The results showed that the hydrothermal stability of γ-Al2O3 was determined by the crystallity of pseudo-boehmite. The well crystallized γ-Al2O3 with fewer hydroxyl and weak acidity exhibited higher hydrothermal stability compared with poor crystal- lized one. |
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| Keywords: | catalytic chemistry pseudo-boehmite γ-Al2 O3 hydrothermal stability |
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