刘璐,马雅婷,郁格格,赵玉宝.高分散态铀氧化物对硝酸钾热分解的催化作用[J].南华大学学报(自然科学版),2024,(3):90~96.[LIU Lu,MA Yating,YU Gege,ZHAO Yubao.Catalytic Effect of Highly Dispersed State Uranium Oxides on the Thermal Decomposition of Potassium Nitrate[J].Journal of University of South China(Science and Technology),2024,(3):90~96.]
高分散态铀氧化物对硝酸钾热分解的催化作用
Catalytic Effect of Highly Dispersed State Uranium Oxides on the Thermal Decomposition of Potassium Nitrate
投稿时间:2024-03-03  
DOI:
中文关键词:  硝酸钾  铀氧化物  动力学参数  活化能  指前因子
英文关键词:potassium nitrate  uranium oxide  kinetic parameter  activation energy  prefactor
基金项目:国家自然科学基金资助项目(22272074)
作者单位
刘璐 南华大学 化学化工学院,湖南 衡阳 421001 
马雅婷 南华大学 化学化工学院,湖南 衡阳 421001 
郁格格 南华大学 化学化工学院,湖南 衡阳 421001 
赵玉宝 南华大学 化学化工学院,湖南 衡阳 421001 
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中文摘要:
      以SBA-15为载体,通过水热法制得高分散态的铀氧化物,而后引入KNO3。基于程序升温分解-质谱(temperature programmed decomposition-mass spectrometry,TPDE-MS)联用技术,研究了KNO3的热分解行为。利用KAS(Kissinger-Akahira-Sunose)方法和F1/3方法分析了KNO3热分解数据,得出相应的动力学参数。结果表明:纯KNO3在600 ℃左右开始发生分解,分解率位于0.5~0.8时,其分解反应符合F1/3方法模型函数,反应活化能为285 kJ/mol;高分散态铀氧化物上,KNO3分解温度降低至200 ℃,分解活化能在205.4~207.3 kJ/mol之间。铀氧化物对KNO3具有良好的催化活性,采用KAS和F1/3方法得到KNO3热分解的平均活化能分别降低了30和74 kJ/mol。
英文摘要:
      High Dispersed Uranium oxides were obtained by hydrothermal method using SBA-15 as a carrier, and later introduced KNO3. Thermal decomposition behavior of KNO3 was studied based on the (temperature programmed decomposition-mass spectromer, TPDE-MS). The thermal decomposition data of KNO3 were analyzed using KAS method and F1/3 method, and the corresponding kinetic parameters were derived. The results show that the decomposition of pure KNO3 starts to occur at about 600 ℃, and when the decomposition rate lies in the range of 0.5-0.8, the decomposition reaction conforms to the model function of the F1/3 method, with a reaction activation energy of 285 kJ/mol; on the high dispersed uranium oxides, the decomposition temperature of KNO3 decreases to 200 ℃, and the decomposition activation energy is in the range of 205.4-207.3 kJ/mol. Uranium oxides have good catalytic activity for KNO3, resulting in a reduction of the average activation energy of thermal decomposition of KNO3 was reduced by 30 and 74 kJ/mol using KAS and F1/3 mothods, respectively.
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