Production of low-tar producer gas from air gasification of mixed plastic waste in a two-stage gasifier using olivine combined with activated carbon

Min Hwan Cho, Tae Young Mun, Joo Sik Kim

Research output: Contribution to journalArticlepeer-review

66 Scopus citations

Abstract

A fraction of mixed plastic waste was gasified using olivine as a bed material and activated carbon as a tar-cracking additive in a two-stage gasifier. The effects of the amount of activated carbon, the use of an activated carbon filter, and the removal of an EP (electrostatic precipitator) from the process on the gas composition and tar amount generated were investigated. The effects of the ER (equivalence ratio), the type of distributor, the use of steam and the use of a wire mesh basket for activated carbon on the coke removal were also examined. As a result, H2 concentrations of around 30 vol% were obtained with 1500g of activated carbon. The tar removal efficiency was maximized at about 98% with the application of 1500g of activated carbon and steam. The LHVs (lower heating values) of the producer gases obtained with the two additives at ERs of about 0.31 were in the range of 5.3-6.2MJ/Nm3.

Original languageEnglish
Pages (from-to)688-694
Number of pages7
JournalEnergy
Volume58
DOIs
StatePublished - 1 Sep 2013

Keywords

  • Activated carbon
  • Coke
  • Mixed plastic wastes
  • Olivine
  • Tar removal
  • Two-stage gasifier

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