Kinetic study of high density polyethylene (HDPE) pyrolysis

被引：130

作者：

Al-Salem, S. M. ^{[1
]}

Lettieri, P. ^{[1
]}

机构：

[1] UCL, Ctr Technol CO2, Dept Chem Engn, London WC1E 7JE, England

来源：

CHEMICAL ENGINEERING RESEARCH & DESIGN | 2010年 / 88卷 / 12A期

关键词：

Pyrolysis; HDPE; Gases; Waxes; Polymer; Kinetics; FLUIDIZED-BED REACTOR; THERMAL-DEGRADATION; PLASTICS; TEMPERATURE; THERMOLYSIS; ATMOSPHERE; PRODUCTS; WASTE; DECOMPOSITION; POLYPROPYLENE;

D O I：

10.1016/j.cherd.2010.03.012

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

In this study, 15 mg samples of high density polyethylene (HDPE) were pyrolysed in an isothermal thermogravimetric set-up in a micro-thermobalance reactor with pre-set temperatures. The objective was to study the thermal degradation behaviour of the polymer and determine the kinetic rate constants and overall activation energy (E(o)). Yielded pyrolysis products under different temperatures were analyzed and lumped into the following categories: rich gases (C(1)-C(4)), liquids (non-aromatic C(5)-C(10)), aromatics (single ring structures), waxes ( C(11)) and char. It was observed that the gas yield was increasing with the operating temperature. Data obtained enabled us to propose a novel kinetic modelling approach based on the thermal cracking of the polymer by primary and secondary depolymerisation reactions to form the pyrolysis products. The E(o) was estimated to be 147.25 kJ mol(-1) for the total conversion of HDPE in isothermal pyrolysis. (C) 2009 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.

引用

页码：1599 / 1606

页数：8