Production of clean oil with low levels of chlorine and olefins in a continuous two-stage pyrolysis of a mixture of waste low-density polyethylene and polyvinyl chloride

Ki Bum Park, Seung Jin Oh, Guzelciftci Begum, Joo Sik Kim

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

In this study, a continuous two-stage pyrolyzer consisting of an auger reactor and a fluidized bed reactor was applied to produce an oil with a low level of chlorine from a mixture of low density polyethylene and polyvinyl chloride waste. In the experiment, the auger reactor operated at 300–400 °C, thus releasing HCl prior to the main pyrolysis in the fluidized bed reactor. The auger reactor also played a role in elevating vibrational modes of molecules to promote the production of ethene, propene, and 1,3-butadiene. The yields of those monomers totaled 29 wt.%. Pyrolysis oils obtained from the fluidized bed reactor were enriched with aromatics up to 95 wt.%. Together with the two-stage pyrolyzer and a lime hot filter, a pyrolysis oil having only 9.25 ppm chlorine could be obtained. This value is the lowest ever reported. This study showed that a two-stage pyrolyzer together with a lime hot filter could produce a pyrolysis oil with a very low chlorine content. Further, this work implies that the production of valuable monomers from the pyrolysis of polyolefins can be enhanced when a two-stage pyrolyzer is applied.

Original languageEnglish
Pages (from-to)402-411
Number of pages10
JournalEnergy
Volume157
DOIs
StatePublished - 15 Aug 2018

Keywords

  • Chlorine
  • Lime
  • Monomer
  • Polyethylene
  • Polyvinylchloride
  • Two-stage pyrolysis

Fingerprint

Dive into the research topics of 'Production of clean oil with low levels of chlorine and olefins in a continuous two-stage pyrolysis of a mixture of waste low-density polyethylene and polyvinyl chloride'. Together they form a unique fingerprint.

Cite this