Study of pyrolysis of high density polyethylene in the open system and estimation of its capability for co-pyrolysis with lignite

Main Article Content

Ivan Kojić
Achim Bechtel
Friedrich Kittinger
Nikola Stevanović
Marko Obradović
Ksenija Stojanović
http://orcid.org/0000-0002-5566-2648

Abstract

Pyrolysis of high density polyethylene (HDPE) in the open system was studied. A plastic bag for food packing was used as a source of HDPE. Pyrolysis was performed at temperatures of 400, 450 and 500 °C, which were chosen based on thermogravimetric analysis. The HDPE pyrolysis yielded liquid, gaseous and solid products. Temperature rise resulted in the increase of conversion of HDPE into liquid and gaseous products. The main constituents of liquid pyrolysates are 1-n-alkenes, n-alkanes and terminal n-dienes. The composition of liquid products indicates that the performed pyrolysis of HDPE could not serve as a standalone operation for the production of gasoline or diesel, but preferably as a pre-treatment to yield a product to be blended into a refinery or petrochemical feed stream. The advantage of a liquid pyrolysate in comparison to crude oil is the extremely low content of aromatic hydrocarbons and the absence of polar compounds. The gaseous products have desirable composition and consist mainly of methane and ethene. The solid residues do not produce ash by combustion and have high calorific values. Co-pyrolysis of HDPE with mineral-rich lignite indicated positive synergetic effect at 450 and 500 °C, which is reflected through the increased experimental yields of liquid and gaseous products in comparison to theoretical ones.

Article Details

How to Cite
[1]
I. Kojić, A. Bechtel, F. Kittinger, N. Stevanović, M. Obradović, and K. Stojanović, “Study of pyrolysis of high density polyethylene in the open system and estimation of its capability for co-pyrolysis with lignite”, J. Serb. Chem. Soc., vol. 83, no. 7-8, pp. 923–940, Aug. 2018.
Section
Environmental Chemistry
Author Biographies

Ivan Kojić, University of Belgrade, Innovation Center of the Faculty of Chemistry, Studentski trg 12-16, 11000 Belgrade

Faculty of Chemistry

PhD Student

Achim Bechtel, Montanuniversität Leoben, Department of Applied Geosciences and Geophysics, Peter Tunner Strasse 5, A-8700 Leoben

Department of Applied Geosciences and Geophysics

Senior Scientist

Friedrich Kittinger, Montanuniversität Leoben, Department of Product Engineering, Franz-Josef-Strasse 18, A-8700 Leoben

Department of Product Engineering

Scientific Researcher

Nikola Stevanović, University of Belgrade, Faculty of Chemistry, Studentski trg 12-16, 11000 Belgrade

Faculty of Chemistry

Assistant

 

Marko Obradović, University of Belgrade, Faculty of Mechanical Engineering, Kraljice Marije 16, 11000 Belgrade

Faculty of Mechanical Engineering

Assistant Professor

Ksenija Stojanović, University of Belgrade, Faculty of Chemistry Studentski trg 12-16, 11000 Belgrade

Faculty of Chemistry,

Full Professor

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