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Citation: Jiang De-En, Zhao Bi-Ying, Xie You-Chang. Thermal Decomposition Behavior of Mg(NO₃)₂ on γ-Al₂O₃ and Basicity of M /γ-Al₂O₃[J]. Acta Physico-Chimica Sinica, ;2000, 16(02): 105-110. doi: 10.3866/PKU.WHXB20000203 shu

Thermal Decomposition Behavior of Mg(NO₃)₂ on γ-Al₂O₃ and Basicity of M /γ-Al₂O₃

1.
Institute of Physical Chemistry,Peking University,Beijing 100871

Received Date: 12 May 1999
Available Online: 15 February 2000

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 M /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 M 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 M /γ-Al2O3 shows a highest value around the loading of threshold, which indicates that the basicity of M /γ-Al2O3 originates from M in dispersion state. The basicity of M /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, M /γ-Al2O3 is a promising solid base that may be found in use.
- Mg(NO₃)₂/γ-Al₂ O₃,
- M /γ-Al₂O₃,
- Supported solid base,
- Thermal decomposition,
- CO₂-TPD
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Thermal Decomposition Behavior of Mg(NO3)2 on γ-Al2O3 and Basicity of M /γ-Al2O3

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通讯作者: 陈斌, bchen63@163.com

Thermal Decomposition Behavior of Mg(NO₃)₂ on γ-Al₂O₃ and Basicity of M /γ-Al₂O₃