Influence of reaction conditions on bio-oil production from pyrolysis of construction waste wood

Jeong Wook Kim, Hyung Won Lee, In Gu Lee, Jong Ki Jeon, Changkook Ryu, Sung Hoon Park, Sang Chul Jung, Young Kwon Park

Research output: Contribution to journalArticlepeer-review

50 Scopus citations

Abstract

The pyrolysis characteristics of construction waste wood were investigated for conversion into renewable liquid fuels. The activation energy of pyrolysis derived from thermogravimetric analysis increased gradually with temperature, from 149.41kJ/mol to 590.22kJ/mol, as the decomposition of cellulose and hemicellulose was completed and only lignin remained to be decomposed slowly. The yield and properties of pyrolysis oil were studied using two types of reactors, a batch reactor and a fluidized-bed reactor, for a temperature range of 400-550°C. While both reactors revealed the maximum oil yield at 500°C, the fluidized-bed reactor consistently gave larger and less temperature-dependent oil yields than the batch reactor. This type of reactor also reduced the moisture content of the oil and improved the oil quality by minimizing the secondary condensation and dehydration. The oil from the fluidized-bed reactor resulted in a larger phenolic content than from the batch reactor, indicating more effective decomposition of lignin. The catalytic pyrolysis over HZSM-5 in the batch reactor increased the proportion of light phenolics and aromatics, which was helpful in upgrading the oil quality.

Original languageEnglish
Pages (from-to)41-48
Number of pages8
JournalRenewable Energy
Volume65
DOIs
StatePublished - May 2014

Keywords

  • Bio-oil
  • Catalyst
  • Construction waste wood
  • Pyrolysis
  • Reaction conditions
  • Reactor

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