Investigating the effect of zeolite catalyst in the co-pyrolysis of low density polyethylene and poplar wood

Subject Areas :

Sepideh Behnam ¹ , Mortaza Gholizadeh ²

1 - Faculty of Chemical and Petroleum Engineering, University of Tabriz
2 - Faculty of Chemical and Petroleum Engineering, University of Tabriz

Received: 2022-04-13 Accepted : 2022-09-07 Published : 2022-11-22

Keywords: zeolite, pyrolysis, Poplar wood, low density polyethylene,

Abstract :

In this study, the effect of zeolite on the process of mixing poplar wood and low density polyethylene (LDPE) was investigated. For this purpose, in a laboratory-sized reactor, 15 g of this mixture was loaded and pyrolysis of the mixture was performed at 500 °C, atmospheric pressure, and in the atmosphere of nitrogen gas. Addition of A4 zeolite catalyst to the pyrolysis of poplar wood and LDPE increased the amount of tar. The produced tar had two groups of aliphatic and aromatic compounds. The catalyst also increased the amount of aromatic substances in the tar and improved the quality of the tar by deoxygenation. According to the results of SEM analysis, it was found that the structure of the solutions produced by thermal and catalytic pyrolysis was similar to the structure of poplar wood. However, the catalytic products had more porosity. The results of FTIR analysis showed that the addition of catalyst caused a slight deoxygenation of wax surface obtained from catalytic pyrolysis and also reduced the amount of wax produced. These results showed that A4 zeolite catalyst tended to deoxygenate the surface of the products. According to the XRD patterns and elemental analysis of the catalyst, it was determined that a very small amount of coke was formed on the catalyst after the reaction.

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