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对大米和低密度聚乙烯共热解的热重量测量分析:动力和热力学参数

Divya Bisen¹, Ashish Pratap Singh Chouhan², Anil Kumar Sarma³

¹Department of Physics, School of Chemical Engineering and Physical Sciences, Lovely Professional University, Phagwara, Punjab, India. divebisen23@gmail.com.

Scientific reports

|December 31, 2024

概括

低密度聚乙烯 (LDPE) 和大米的联合热解显示出复杂的热行为. 混合这些废物材料显著改变了热力学特性,这对于开发高效的废物转化能源反应堆至关重要.

科学领域:

废物管理废物管理
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

背景情况:

越来越多的塑料废物,特别是低密度聚乙烯 (LDPE),带来了重大的环境挑战.
米是一种农业残留物,是丰富的,但往往未得到充分利用,为价值化提供了机会.
共热解提供了一个有前途的热化学途径,将混合废物流转化为有价值的产品.

研究的目的:

调查低密度聚乙烯 (LDPE) 对大米的联合热解的影响.
分析LDPE-米混合物的物理化学特性,热行为和动力参数.
评估共热解在废物回收和能源回收方面的潜力.

主要方法:

热重力测量分析 (TGA) 用于研究在气氛下LDPE:RH混合物 (50:50, 25:75, 75:25) 的热分解.
加热速度在30至600°C的温度范围内从10到40°C/分钟不等.
动力参数,包括激活能量 (Ea),使用积分 (Coats-Redfern) 和异常转换方法 (Flynn-Wall-Ozawa,Kissinger-Akahira-Sunose) 确定.

主要成果:

与单个成分相比,LDPE和大米的联合热解导致了热力学行为的显著变化.
激活能量值随转换而变化,表明反应机制复杂.
在不同的混合比率和方法中,计算的平均激活能量在101-117kJ/mol之间.

结论:

将LDPE与水皮混合会改变热分解概况和动力参数,突出显示协同效应.
该研究提供了优化共同热解工艺的基本数据,以有效地转化混合塑料和生物质废弃物.
了解这些热力学行为对于设计用于连续废物转化能源应用的有效反应器至关重要.

关键词:

合作热解是一种共热解.隔离转换方法隔离转换方法低密度聚乙烯的低密度聚乙烯.米皮米皮米皮在TGA上,TGA就是TGA.热力学参数是一个热力学参数.

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