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Technology Review

A Comparative Analysis of the Kinetic Experiments in Polyethylene Pyrolysis

[+] Author and Article Information
Pravin Kannan

Department of Chemical Engineering,
The Petroleum Institute,
P.O. Box 2533,
Abu Dhabi
e-mail: pkannan@pi.ac.ae

Salisu Ibrahim, K. Suresh Kumar Reddy, Ahmed Al Shoaibi, C. Srinivasakannan

Department of Chemical Engineering,
The Petroleum Institute,
P.O. Box 2533,
Abu Dhabi

1Corresponding author.

Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received September 16, 2012; final manuscript received April 18, 2013; published online November 26, 2013. Assoc. Editor: Richard West.

J. Energy Resour. Technol 136(2), 024001 (Nov 26, 2013) (6 pages) Paper No: JERT-12-1210; doi: 10.1115/1.4025595 History: Received September 16, 2012; Revised April 18, 2013

A review of literature has been conducted to survey the kinetic data of low-density polyethylene (LDPE) pyrolysis. The review reveals large variations in the reported global kinetic parameters. The cause of variation has been identified to be the difference in the experimental techniques, including thermogravimetric analysis (TGA) and non-TGA methods. Even within the nonisothermal TGA data, large variations have been observed at heating rate of 20 K/min, while the variations are insignificant at lower heating rate regimes (2–10 K/min), indicating the influence of heat/mass transfer resistance controlling the kinetics. Detailed analysis revealed that most of the current techniques are unable to capture all the relevant data necessary for estimating the kinetic parameters of the aforementioned process. The outcome of this review work thrusts the need for a better experimental technique to estimate the kinetic parameters of complex reactions, such as polymer pyrolysis.

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Figures

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Fig. 1

Isothermal conversion plot of LDPE at 490 °C

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Fig. 2

Isothermal conversion plot of LDPE at a nominal temperature of 420 °C

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Fig. 3

Dynamic experimental curve for LDPE decomposition at low heating rate regimes (2–10 K/min)

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Fig. 4

Dynamic experimental curve for LDPE decomposition at a heating rate of 20 K/min

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Fig. 5

Comparison of reaction rate constant from various LDPE pyrolysis studies

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