摘要
在热重分析仪上开展三种石油焦的热解特性研究,分析了颗粒直径、升温速率和样品种类对石油焦挥发分析出温度区间、析出速率的影响。研究结果表明,热解过程挥发分析出主要集中在500~800℃温度区间内;颗粒直径小,石油焦挥发分析出起始温度高,但颗粒直径对整体析出速率影响较小;随升温速率增大,热解起始温度升高,热解速率峰值变大;高挥发分石油焦,挥发分析出起始温度低,挥发分析出峰值大。采用Coats-Redfern法建立石油焦热解过程的动力学模型,三种石油焦热解模型遵循化学反应机理,反应活化能在45~63k J/mol之间。
The pyrolysis characteristics of three kinds of petroleum coke were studied in a thermogravimetric analyzer. The influence of particle diameter, heating rate, sample type of petroleum coke on devolatillzatlon temperature and precipitation rate were analyzed. The results showed that the pyrolysis process of devolatilization mainly concentrated in temperature range of 500 - 800 ℃. The starting tem- perature of devolatilization was high when particle diameter was small. However, particle diameter had little effect on the overall precipitation rate. With the increase of heating rate, the starting temperature of pyrolysis, the pyrolysis rate peak increased. When the volatile in the petroleum coke was high, there were low starting temperature and pyrolysis rate peak. The kinetic model of pyrolysis process of petroleum coke was established by Coats - Redfern method. The pyrolysis models of three petroleum coke followed the chemical reaction mechanism, and the activation energy of reaction was between 45 63 kJ/mol.
作者
杨光华
Yang Guanghua(Shenyang Aluminum and Magnesium Engineering and Research Institute Co.,Ltd)
出处
《冶金能源》
2018年第5期37-41,64,共6页
Energy For Metallurgical Industry
关键词
石油焦
热解
挥发分
析出速率
动力学模型
petroleum coke
pyrolysis volatile precipitation
rat kinetic mode
