Comprehensive analysis of pyrolysis in medical rubber gloves: pyrolysis characteristics, kinetics, thermodynamics, volatile products, and pathways

Waste Disposal & Sustainable Energy Pub Date : 2024-05-23 DOI:10.1007/s42768-024-00197-z

Xianbo Qu, Yanlong Li, Xiaojuan Zhang, Rundong Li

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Abstract

The surge in medical waste, fueled by the impact of COVID-19 and the influenza A virus, poses substantial challenges to waste treatment. Nevertheless, pyrolysis technology introduces a novel approach to the treatment of medical waste. This study investigated the pyrolytic characteristics, kinetics, thermodynamic parameters, volatile gases, and pyrolytic pathways of medical rubber gloves (MRGs) in a N₂ atmosphere utilizing Thermal Gravimetric Analyzer (TGA), Thermogravimetric-Fourier transform infrared spectroscopy (TG-FTIR) and Pyrolysis gas chrogams-mass spectrometry (Py-GC/MS) analyses. Pyrolysis of MRG predominantly occurs between 284–501 °C and 613–701 °C. The initial stage is the primary reaction phase, exhibiting an average activation energy of 339.77 kJ/mol, following the reaction order model (Fn). The second pyrolysis stage has an average activation energy of 236.93 kJ/mol and adheres to the geometric contraction model (Rn). The volatile products from MRG pyrolysis primarily comprise olefins, alkanes, and aromatic hydrocarbons. The olefins consist primarily of 1,2-pentadiene and d-limonene, while the alkanes include cyclopropane, cyclohexane, and 1,4-dimethyl. Aromatic compounds are chiefly benzene, toluene, and xylene.

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医用橡胶手套热解综合分析：热解特性、动力学、热力学、挥发性产物和途径

受 COVID-19 和甲型流感病毒的影响，医疗废物激增，给废物处理带来了巨大挑战。然而，热解技术为医疗废物的处理引入了一种新方法。本研究利用热重分析仪（TGA）、热重-傅立叶变换红外光谱仪（TG-FTIR）和热解气体质谱仪（Py-GC/MS）分析，研究了医用橡胶手套（MRGs）在氮气环境中的热解特性、动力学、热力学参数、挥发性气体和热解途径。MRG 的热解主要发生在 284-501 °C 和 613-701 °C 之间。初始阶段为初级反应阶段，按照反应顺序模型（Fn），平均活化能为 339.77 kJ/mol。第二个热解阶段的平均活化能为 236.93 kJ/mol，遵循几何收缩模型 (Rn)。MRG 高温分解产生的挥发性产物主要包括烯烃、烷烃和芳香烃。烯烃主要包括 1,2-戊二烯和 d-柠檬烯，烷烃包括环丙烷、环己烷和 1,4-二甲基。芳香族化合物主要是苯、甲苯和二甲苯。

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Waste Disposal & Sustainable Energy

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