Reducing tar yield in gasification of paper-reject sludge by using a hot-gas cleaning system

Kung Yuh Chiang, Cheng Han Lu, Ming Hui Lin, Kuang Li Chien

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

A new tar destruction technology has been developed by integrating in-situ catalytic gasification and a hot-gas cleaning system in the catalytic gasification of paper-reject sludge. Experimental results indicated that the tar yield in syngas decreased significantly from 13.64 to 10.76 g/m3, when increasing the zeolite addition during in-situ catalytic gasification. When the syngas passed through the hot-gas cleaning system, the tar concentration measured from downstream was approximately 0.22 g/m3. The hot-gas cleaning system used in this research seems to have played a significant role in reducing tar concentration of the syngas. The major tar speciation identified after hot-gas cleaning system was 1-ring or 2-ring hydrocarbons, which included benzene, toluene, xylene, styrene and naphthalene. In summary, the energy yield efficiency of syngas will be enhanced due to the tar reduction and transformation. The syngas seems to be appropriate to use as a fuel in gas engines for electricity generation.

Original languageEnglish
Pages (from-to)47-53
Number of pages7
JournalEnergy
Volume50
Issue number1
DOIs
StatePublished - 1 Feb 2013

Keywords

  • Catalytic gasification
  • Synthesis gas
  • Tar
  • Zeolite

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