Alumina and Tungstophosphoric Acid Loaded Mesoporous Catalysts for the Polyethylene Degradation Reaction

Aydemir B., SEZGİ N. A.

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, vol.52, no.44, pp.15366-15371, 2013 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 52 Issue: 44
  • Publication Date: 2013
  • Doi Number: 10.1021/ie400634m
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.15366-15371
  • Middle East Technical University Affiliated: Yes


Polyethylene degradation over alumina and tungstophosphoric acid (TPA) containing ordered mesoporous catalysts was studied in a semibatch reactor. In the noncatalytic degradation reaction, selectivity of C-3 and C-4 hydrocarbons was quite high. However, significant ethylene and C-4 hydrocarbon selectivity was observed in the catalytic degradation reaction depending on the type of catalyst used. Liquid product distribution in the noncatalytic degradation reaction indicated the presence of hydrocarbons, being greater than C-18. In the catalytic degradation, chemical composition of the liquid product was hydrocarbons in the range of C-5-C-14. With an increase in the TPA loading, the amount of lighter hydrocarbons in the carbon number range of C-5-Cu-12 was slightly increased due to a decrease in the catalysts' surface area with loading. Both catalysts are materials with promising catalytic properties for the production of liquid feedstocks from polymeric wastes.