Catalytic pyrolysis of waste high-density (HDPE) and low-density polyethylene (LDPE) to produce liquid hydrocarbon using silica-alumina catalyst

Authors

  • Mahmudur Rahman Department of Chemistry, Jagannath University, Dhaka, Bangladesh
  • Bijoy Kumar Mondal Dhaka University of Engineering and Technology, Gazipur, Bangladesh
  • Nafees Ahmed Department of Chemistry, Jagannath University, Dhaka, Bangladesh
  • Md Delwar Hossain Department of Chemistry, Jagannath University, Dhaka, Bangladesh

DOI:

https://doi.org/10.3329/jbas.v47i2.67950

Keywords:

Pyrolysis,, High density polyethylene (HDPE),, Low density polyethylene (LDPE),, Catalyst

Abstract

Catalytic pyrolysis of waste HDPE and LDPE polyethylene was successfully carried out using a silica-alumina catalyst at 450 °C under N2 atmosphere. The synthesized silica-alumina is mesoporous and shows type IV isotherm. Thermal pyrolysis (without any catalyst) provided 47% wax-like hydrocarbons at 485 °C. On the other hand, more than 80% liquid yield was achieved using silica-alumina catalysts from waste HDPE and LDPE. The highest liquid yield was obtained from LDPE (87.69%) than HDPE (83.25%) at a catalyst-to-plastic ratio of 1:25. The 1H NMR shows that the liquid product does not contain any aromatic compound. The GC-MS, 1H NMR, and FTIR confirmed that the liquid contains linear and branched alkanes and alkenes.

J. Bangladesh Acad. Sci. 47(2); 195-203: December 2023

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Published

2023-12-21

How to Cite

Rahman, . M., Mondal, B. K. ., Ahmed, N. ., & Hossain, M. D. . (2023). Catalytic pyrolysis of waste high-density (HDPE) and low-density polyethylene (LDPE) to produce liquid hydrocarbon using silica-alumina catalyst. Journal of Bangladesh Academy of Sciences, 47(2), 195–203. https://doi.org/10.3329/jbas.v47i2.67950

Issue

Vol. 47 No. 2 (2023)

Section

Research Articles