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含硫油品储罐内壁腐蚀产物硫化亚铁在空气中有很高的氧化性,很容易引起储罐火灾爆炸事故。用美国TA公司生产的SDT-Q600同步热分析仪在30～1 000 ℃范围内对硫化亚铁进行热重分析,从物理吸附、化学吸附和化学反应的角度分析了硫化亚铁氧化过程,讨论了粒径和升温速率对硫化亚铁TG曲线的影响。结果表明,硫化亚铁经物理吸附和化学吸附,发生了剧烈的化学反应,并放出大量热;粒径和升温速率对TG曲线有明显的影响,粒径减小,TG曲线向低温方向移动,氧化起始温度和氧化终止温度降低;升温速率增大,TG曲线向高温方向移动,氧化速度减小。
Sulfur oil tank wall corrosion products Ferrous sulfide in the air has a high oxidation, it is easy to cause tank fire and explosion accidents. The thermogravimetric analysis of ferrous sulphide was carried out with the SDT-Q600 synchronous thermal analyzer produced by American TA Company in the range of 30-1000 ℃. The ferrous sulfide oxidation process was analyzed from the perspective of physical adsorption, chemical adsorption and chemical reaction. Effect of Particle Size and Heating Rate on TG Curve of Ferrous Sulfide. The results show that the ferrous sulfide has a violent chemical reaction and release a large amount of heat by physical adsorption and chemisorption. The particle size and heating rate have a significant effect on the TG curve, the particle size decreases, the TG curve moves to the low temperature, The oxidation initiation temperature and the oxidation termination temperature decrease; the heating rate increases, the TG curve shifts to the high temperature, and the oxidation rate decreases.