Catalytic degradation of polyethylene into fuel oil over mesoporous silica (KFS-16) catalyst

Yusaku Sakata, M. Azhar Uddin, Akinori Muto, Yasufumi Kanada, Kazuo Koizumi, Katsuhide Murata

Research output: Contribution to journalArticle

85 Citations (Scopus)

Abstract

The thermal degradation of plastic polymers into fuel oil over mesoporous silica (KFS-16) catalyst has been investigated. The product yields, composition and degradation rate of polyethylene over KFS-16 were compared with those over solid acid catalyst (silica-alumina and zeolite) and non-catalytic thermal degradation. The initial rate of degradation of PE over KFS-16, which possesses no acid sites was as fast as that over silica-alumina (SA-1) and the yield of liquid products was higher. The composition of the liquid products of degradation over KFS-16 was different from that over SA-1 and similar to that of non-catalytic thermal degradation. SA-1 catalyst deactivated very rapidly due to coke deposition, whereas KFS-16 deactivated much more slowly. These findings over mesoporous silica suggest that the mesopores surrounded by the silica sheet may act as a flask for storing radical species for a long time and then long-lived radicals accelerate the degradation of plastics.

Original languageEnglish
Pages (from-to)15-25
Number of pages11
JournalJournal of Analytical and Applied Pyrolysis
Volume43
Issue number1
DOIs
Publication statusPublished - Aug 1997

Keywords

  • Catalytic degradation
  • Fuel oil
  • Mesoporous silica
  • Polyethylene

ASJC Scopus subject areas

  • Analytical Chemistry
  • Fuel Technology

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