FeS诱发含硫油品自燃的事故受到了业界的日益关注。通过在不同升温速率(2, 5, 8, 10, 15 ℃/min)下的热分析实验，应用模型和非模型拟合研究了FeS的热分解动力学机理，结果表明：FeS受热氧化是FeS与氧气物理吸附、化学吸附和化学反应过程，对FeS的模型拟合结果不稳定，可靠性较差；采用等转化率法得到FeS热分解的表观活化能E=(135.81±8.27)kJ/mol；通过Satava-Sestak方程确定了FeS的受热分解符合成核和生长模型函数A2：g(α)= ［-ln(1-α)］1/2，其表观活化能E=148.43 kJ/mol，表观指前因子A=3.82×109 K/s。

More and more attention is paid to the spontaneous combustion accidents of oil which is induced by FeS. The thermal analysis experiments of FeS are finished with different heating rates of 2, 5, 8, 10, 15 ℃/min. The essence about the oxidation of ferrous sulfide in air is a process containing physical adsorption, chemical adsorption and chemical reaction of ferrous with the oxygen. Based on the experiments data, the kinetics of thermal decomposition of FeS is studied by model-fitting and model-free methods. It is shown that the computable results of the model-fitting are unstable and irresponsible. The kinetics parameters of FeS are calculated by the iso-conversional method. The apparent activated energy E is equal to(135.81±8.27)kJ/mol. Through the equation of Satava-Sestak, the kinetics of thermal degradation of FeS is researched. The reaction accorded with the Avrami-Erofeev (m=2) kinetic model is g(α)= ［-ln(1-α)］1/2. The apparent activated energy E is 148.43 kJ/mol and the apparent preexponential factor A is 3.82×109 K/s.

国家自然科学基金项目(50774048)；南京工业大学青年教师学术基金资助项目(39714008)