| 硝酸镁在γ-Al2O3上的热分解及MgO/γ-Al2O3 |
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| 引用本文： | 江德恩,赵璧英,谢有畅.硝酸镁在γ-Al2O3上的热分解及MgO/γ-Al2O3[J].物理化学学报,2000,16(2):105-110. |
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| 作者姓名： | 江德恩 赵璧英 谢有畅 |
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| 作者单位： | Institute of Physical Chemistry,Peking University,Beijing 100871 |
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| 基金项目： | 国家科委基础性研究重大项目课题;国家自然科学基金重点资助项目(29733080) |
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| 摘 要： | 研究了不同载量时Mg(NO
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| 关 键 词： | Mg(NO3)2/γ-Al2 O3 MgO/γ-Al2O3 负载型固体碱 热分解 CO2-TPD |
| 收稿时间： | 1999-05-12 |
| 修稿时间： | 1999年5月12日 |
Thermal Decomposition
Behavior of Mg(NO3)2 on |
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| Jiang De.Thermal Decomposition
Behavior of Mg(NO3)2 on[J].Acta Physico-Chimica Sinica,2000,16(2):105-110. |
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| Authors: | Jiang De |
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| Institution: | Institute of Physical Chemistry,Peking University,Beijing 100871 |
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| Abstract: | The state and thermal decomposition behavior of Mg(NO3)2 on γ-Al2O3 at different Mg loading were studied by XRD and TG DTA. The basicity of MgO/γ-Al2O3 with different Mg loading was investigated by CO2 TPD and compared with t hat of Mg Al mixed oxides derived from hydrotalcite. Results show that Mg(NO3)2 can disperse on γ Al2O3 as a monolayer and its dispersion determines the dispersion threshold of MgO on γ-Al2O3. Mg(NO3)2 in dispersion state has lower decomposition temperature than that in crystal state. The amount of basic sites per square meter on the surface of MgO/γ-Al2O3 shows a highest value around the loading of threshold, which indicates that the basicity of MgO/γ-Al2O3 originates from MgO in dispersion state. The basicity of MgO/γ-Al2O3 around the thresh old loading is comparable and even superior to that of Mg(Al)O derived from hydrotalcite. Since the texture and specific area of γ-Al2O3 can be easily adapted and there are various kinds of commercial γ-Al2O3 available, MgO/γ-Al2O3 is a promising solid base that may be found in use. |
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| Keywords: | Mg(NO3)2/γ-Al2 |
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