Thermal degradation behaviors of polyethylene and polypropylene. Part I: Pyrolysis kinetics and mechanisms
Thermal degradation behaviors of polyethylene and polypropylene. Part I: Pyrolysis kinetics and mechanisms
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DOI：
10.1016/j.enconman.2009.12.017
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发表时间：
2010-07-01
影响因子：
10.4
通讯作者：
El Bouadili, A.
中科院分区：
文献类型：
--
作者：
Aboulkas, A.;El Harfi, K.;El Bouadili, A.
分解动力学的研究是工业规模聚合物回收发展的重要工具。在这项工作中，根据非等温动力学结果估算了高密度聚乙烯（HDPE）、低密度聚乙烯（LDPE）和聚丙烯（PP）热解的活化能和反应模型。首先，通过Friedman、Kissinger-Akahira-Sunose和Flynn-Wall-Ozawa等转化方法获得的活化能为HDPE为238-247 kJ/mol，LDPE为215-221 kJ/mol，PP为179-188 kJ/mol。其次，通过Coats-Redfern和Criado方法确定了合适的过程转化模型。 HDPE和LOPE的热解反应模型采用“Contracting Sphere”模型，而PP的热解反应模型采用“Contracting Cylinder”模型。 (C) 2009 Elsevier Ltd. 保留所有权利。
Study of the decomposition kinetics is an important tool for the development of polymer recycling in industrial scale. In this work, the activation energy and the reaction model of the pyrolysis of high density polyethylene (HDPE), low density polyethylene (LDPE) and polypropylene (PP) have been estimated from non-isothermal kinetic results. Firstly, the activation energy values obtained by Friedman, Kissinger-Akahira-Sunose and Flynn-Wall-Ozawa isoconversional methods, are 238-247 kJ/mol for HDPE, 215-221 kJ/mol for LDPE and 179-188 kJ/mol for PP. Secondly, the appropriate conversion model of the process was determined by Coats-Redfern and Criado methods. The pyrolysis reaction models of HDPE and LOPE are accounted for by "Contracting Sphere" model, whereas that of PP by "Contracting Cylinder" model. (C) 2009 Elsevier Ltd. All rights reserved.