摘要
为揭示FeS引起油气储罐和炼油设备着火、爆炸事故的机制,以防治FeS自燃,分析活性FeS氧化发火特性,构建自燃反应表观动力学模型。首先,利用差热天平测定室温时样品放热变化及热重变化,分析样品自燃发火倾向性及化学反应机制;然后,研究氧气及空气气氛对FeS自燃反应的影响。首次通过试验证实,活性FeS在室温时即可与纯氧气或空气中的氧快速反应并释放大量热,且极易自燃;首次利用FWO法开展FeS室温下自燃反应表观动力学研究。研究结果表明:活性FeS样品在氧气中的自燃反应主要产物为Fe_2O_3,Fe_2(SO_4)_3和SO_2,表观活化能为57.101 k J/mol;在空气中的自燃反应主要产物为Fe_2O_3,S和SO_2,表观活化能为89.471 k J/mol。
To reveal the mechanism of fire and explosion in tanks by FeS, and to combat spontaneous combustion of FeS, active FeS was researched and models about apparent kinetics were built.Firstly, differential thermal balance was used to measure changes in heat and mass of the sample at room temperature, and spontaneous combustion tendency and mechanism for reaction of FeS at room temperature were analyzed.Then, the effects of oxygen and air were studied. For the first time it＇s confirmed by experiment that active FeS can react rapidly, with the oxygen in a pure oxygen atmosphere or air at room temperature and release a lot of calories, and spontaneous combustion occurs easily. For the first time FWO（Flynn-Wall-Ozawa） was used to carry out the research on apparent kinetics for spontaneous combustion of FeS. The results show that Fe2O3,Fe2（SO4）3 and SO2 can be generated by active FeS in an oxygen atmosphere, while Fe2O3, S and SO2 can be generated in the air. By FWO,the activation energy in oxygen atmosphere is 57.100 k J/mol, while in the air it is 89.471 k J/mol.
出处
《中国安全科学学报》
CAS
CSCD
北大核心
2016年第10期30-35,共6页
China Safety Science Journal
基金
北京市自然科学基金资助(2162016)
国家科技支撑计划课题(2015BAK16B03)
国家安全监督管理总局2015年安全生产重大事故防治关键技术科技项目(Beijing-0001-2015A)
关键词
活性硫化亚铁
自燃倾向
氧化反应
表观动力学
活化能
active ferrous sulfide
spontaneous combustion tendency
oxidation reaction
apparent kinetics
activation energy
