双氧水及其杂质作用下的热稳定性研究  

Thermal Hazards Investigation of Hydrogen Peroxide and Impurities

作　　者：黎伟欣 桂雪峰 崔晓花 胡继文[1,2] 刘洋 龚子洋 周仁杰 李炜乐 LI Weixin;GUI Xuefeng;CUI Xiaohua;HU Jiwen;LIU Yang;GONG Ziyang;ZHOU Renjie;LI Weile(Guangzhou Institute of Chemistry,Chinese Academy of Sciences,CAS Engineering Laboratory for Special Fine Chemicals,Guangzhou 510650,China;CASH GCC Shaoguan Research Institute of Advanced Materials,CASH GCC Fine Chemicals Incubator(Nanxiong)Co.Ltd.,Nanxiong 512400,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院广州化学研究所中国科学院新型特种精细化学品工程实验室,广东广州510650 [2]国科广化韶关新材料研究院国科广化精细化工孵化器(南雄)有限公司,广东南雄512400 [3]中国科学院大学,北京100049

出　　处：《广州化学》2024年第4期17-21,I0001,共6页Guangzhou Chemistry

基　　金：国家自然科学基金(214041222);清远科技项目(2022YFJH004)。

摘　　要：使用差示扫描量热仪(DSC)检测不同浓度双氧水及其杂质的起始放热温度、峰值温度和反应热等热参数,并利用热分析动力学方法分析得出活化能、指前因子动力学参数。结果显示:27.5%双氧水的起始放热温度在69℃至130℃,比放热量为762.36~825.37 J/g;随着升温速率的增大,双氧水放热温度升高,根据热分析动力学计算得出27.5%双氧水的活化能为63.63 kJ/mol,指前因子A为19.29 s^(-1);不同的杂质对双氧水的热稳定性影响不同,通过XPS测试推出Cr^(3+)掺杂在双氧水中会被氧化成Cr^(6+)。综上,在生产、运输和应用双氧水的过程中要控制合适的温度以及避免杂质的引入。Differential scanning calorimeter(DSC)was used to detect thermal parameters such as the initial exothermic temperature,peak temperature and reaction heat of different concentrations of hydrogen peroxide and its impurities.The thermal analysis kinetic method is used to analyze and obtain kinetic parameters,such as activation energy and pre-exponential factor.The results show that the initial heat release temperature of 27.5%hydrogen peroxide is between 69 and 130℃,and the specific heat release is 762.36~825.37 J/g.As the heating rate increases,the exothermic temperature of hydrogen peroxide increases.According to the thermal analysis kinetic calculation,the activation energy of 27.5%hydrogen peroxide is 63.63 kJ/mol,and the pre-exponential factor A is 19.29 s^(-1).Different impurities have different effects on the thermal stability of hydrogen peroxide,and through XPS testing,it can be concluded that Cr^(3+)is doped in hydrogen peroxide will be oxidized into Cr^(6+).In summary,during the production,transportation and application of hydrogen peroxide,it is necessary to control the appropriate temperature and avoid the introduction of impurities.

关 键 词：双氧水 差示扫描量热仪 热分析动力学 热稳定性 

分 类 号：O611.62[理学—无机化学]