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¹NIET, Chemical, Petroleum and Hydrogen Technology, NIMS University Jaipur 303121 Rajasthan India prasanta.das@nimsuniversity.org.

|August 15, 2024

概括

这项研究分析了废塑料混合物 (WPM) 的热解,以产生有价值的化学物质. 动力模型揭示了不同的热降解阶段,这对于优化塑料废物能量回收至关重要.

科学领域:

化学工程是化学工程的重要组成部分.
材料科学材料科学材料科学
环境科学环境科学

背景情况:

热解提供了一种从废塑料混合物 (WPM) 同时生产石油和天然气的方法.
了解WPM的热降解动力学对于高效的能量回收和化学合成至关重要.

研究的目的:

用各种已建立的动力模型来确定WPM热解的动力参数.
为了研究WPM在不同加热速率和温度范围内的热降解行为.

主要方法:

应用模型拟合 (Coats-Redfern) 和无模型 (Friedman,KAS,FWO) 的动态方法.
在5,10,20和50°C的加热速度下分析了热解动力学min-1 .
计算出明显的激活能量 (E _a),预指数因子 (A _a) 和反应顺序 (n).

主要成果:

确定了WPM在410-510°C和510-770°C之间的两个不同的热降解阶段.
没有模型的方法 (KAS,FWO,弗里德曼) 给出了大约267-298 kJ mol-1的平均激活能量.
考茨-雷德费恩方法显示了广泛的激活能量 (22.56418.80 kJ mol-1),在更高的温度 (510-770 °C) 中观察到较低的值.

结论:

WPM的热解表现出复杂的动力学,有两个主要的热降解区.
动力分析为优化塑料废弃物的热解过程提供了关键数据,用于从塑料废弃物中生产能源和石化产品.
该研究强调了选择适当的运动模型的重要性,以准确解释WPM热解行为.

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