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玉米茎和高密度聚乙烯的共同热解,强调纤维组织在热行为和动力学上的差异

Bo Chen¹, Deyin Xie², Yongjie Jiang²

¹Systems, Power and Energy Research Division, James Watts School of Engineering, College of Science and Engineering, James Watt South, University of Glasgow, Glasgow G128QQ, UK; National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing 100029, PR China.

The Science of the total environment

|December 4, 2024

概括

研究玉米茎组织和高密度聚乙烯 (HDPE) 混合物显示,玉米/HDPE混合物产生有价值的化学物质. 优化原料的预处理可以提高塑料垃圾林氏纤维素共热解性能.

科学领域:

材料科学材料科学材料科学
化学工程是化学工程的重要组成部分.
可再生能源可再生能源是可再生能源.

背景情况:

对高密度聚乙烯 (HDPE) 等纤维纤维素生物质和废塑料的利用对于可持续的资源管理至关重要.
玉米茎组织表现出各种热特性,影响与HDPE的共同热解行为.

研究的目的:

研究各种与HDPE混合的玉米茎组织的热特性和共同热解动力学.
确定最佳的原料成分,以提高化学生产和能源回收.

主要方法:

在气氛下进行热重力测量分析 (TGA),以研究热分解.
热解气色谱法/质谱法 (Py-GC/MS) 用于分析热解产品.
使用基辛格-阿卡希拉-苏诺斯 (KAS) 和弗林-沃尔-奥扎瓦 (FWO) 方法进行动力分析.
机器学习算法 (随机森林,梯度增强回归树) 用于质量损失预测.

主要成果:

增加加热速度延迟了所有玉米茎组织/HDPE混合物的热分解.
玉米/HDPE混合物产生了更多的有价值化学物质,包括衍生物和芳香碳化合物.
玉米/HDPE联合热解表现出最低的激活能量 (149.3 kJ/mol),归因于高含半纤维素含量.
与GBRT相比,随机森林机器学习模型在预测质量损失方面表现出更高的准确性.

结论:

玉米茎组织的结构差异显著影响与HDPE的共同热解性能.
通过隔离特定的植物组织 (如玉米) 进行原料的预处理,可以提高林氏纤维素废弃物塑料共热解的价值.
这些发现支持开发有效的过程,将农业废物和塑料废物转化为有价值的化学品.

关键词:

共同热解是一种联合热解.玉米的茎,就是玉米的茎.纤维组织纤维组织.梯度增强回归树是一种梯度增强回归树.运动学运动学随机的森林随机的森林

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