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研究了不同载量时Mg(NO3)2 在γ Al2O3 上存在状态和热分解行为差异.考察了Mg含量不同时MgO/γ Al2O3 的碱性变化情况 ,并与水滑石焙烧产物Mg(Al)O的碱性进行了对比.结果表明,Mg(NO3)2 可单层分散于γ Al2O3 表面 ,Mg(NO3)2 的分散决定了MgO的分散阈值 ;单层态的Mg(NO3)2 比晶态的分解温度低 ;MgO/γ Al2O3 在阈值附近具有单位表面最高碱量 ,碱位分布与Mg(Al)O相似 ,单位表面碱量高于Mg(Al)O.由于γ Al2O3 的织构可以方便地调节 ,且MgO/γ Al2O3很容易制备 ,MgO/γ Al2O3 是一个很有应用前景的固体碱.
The difference of Mg (NO3) 2 existing in γ-Al2O3 on different contents of Mg (NO3) 2 was investigated. The change of basicity of MgO / The results show that Mg (NO3) 2 can be monolayer dispersed on the surface of γ-Al2O3, and the dispersion of Mg (NO3) 2 determines the dispersion threshold of MgO. The decomposition temperature is low; MgO / γ Al2O3 has the highest alkali content per unit surface near the threshold, and the distribution of alkali sites is similar to that of Mg (Al) O, and the alkali content per unit surface is higher than that of Mg (Al) O. Due to the texture of γ Al2O3, And MgO / γ Al2O3 is easy to prepare. MgO / γ Al2O3 is a promising solid base.