TY - JOUR

T1 - Study of pyrolysis of high density polyethylene in the open system and estimation of its capability for co-pyrolysis with lignite

AU - Kojic, Ivan

AU - Bechtel, Achim

AU - Kittinger, Friedrich

AU - Stevanovic, Nikola

AU - Obradovic, Marko

AU - Stojanovic, Ksenija

PY - 2018

Y1 - 2018

N2 - Pyrolysis of high density polyethylene (HDPE) in the open systemwas 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 werechosen based on thermogravimetric analysis. The HDPE pyrolysis yieldedliquid, gaseous and solid products. Temperature rise resulted in the increase ofconversion of HDPE into liquid and gaseous products. The main constituentsof liquid pyrolysates are 1-n-alkenes, n-alkanes and terminal n-dienes. Thecomposition of liquid products indicates that the performed pyrolysis of HDPEcould not serve as a standalone operation for the production of gasoline ordiesel, but preferably as a pre-treatment to yield a product to be blended into arefinery or petrochemical feed stream. The advantage of a liquid pyrolysate incomparison to crude oil is the extremely low content of aromatic hydrocarbonsand the absence of polar compounds. The gaseous products have desirablecomposition and consist mainly of methane and ethene. The solid residues donot produce ash by combustion and have high calorific values. Co-pyrolysis ofHDPE with mineral-rich lignite indicated positive synergetic effect at 450 and500 °C, which is reflected through the increased experimental yields of liquidand gaseous products in comparison to theoretical ones.

AB - Pyrolysis of high density polyethylene (HDPE) in the open systemwas 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 werechosen based on thermogravimetric analysis. The HDPE pyrolysis yieldedliquid, gaseous and solid products. Temperature rise resulted in the increase ofconversion of HDPE into liquid and gaseous products. The main constituentsof liquid pyrolysates are 1-n-alkenes, n-alkanes and terminal n-dienes. Thecomposition of liquid products indicates that the performed pyrolysis of HDPEcould not serve as a standalone operation for the production of gasoline ordiesel, but preferably as a pre-treatment to yield a product to be blended into arefinery or petrochemical feed stream. The advantage of a liquid pyrolysate incomparison to crude oil is the extremely low content of aromatic hydrocarbonsand the absence of polar compounds. The gaseous products have desirablecomposition and consist mainly of methane and ethene. The solid residues donot produce ash by combustion and have high calorific values. Co-pyrolysis ofHDPE with mineral-rich lignite indicated positive synergetic effect at 450 and500 °C, which is reflected through the increased experimental yields of liquidand gaseous products in comparison to theoretical ones.

U2 - 10.2298/JSC171215027K

DO - 10.2298/JSC171215027K

M3 - Article

VL - 83.2018

SP - 923

EP - 940

JO - Journal of the Serbian Chemical Society

JF - Journal of the Serbian Chemical Society

SN - 0352-5139

IS - 7-8

ER -