Evaluation of fast pyrolysis feedstock conversion with a mixing paddle reactor

S. Zinchik, J. L. Klinger, T. L. Westover, Y. Donepudi, S. Hernandez, J. D. Naber, E. Bar-Ziv

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

We have developed a pyrolysis reactor based on a unique auger-paddle configuration with heat transfer material (HTM) and proved to achieve high heating rates and fast pyrolysis. We tested ten different biomass types and obtained bio-oil yields ranging from approximately 40% for thermally treated wood, to approximately 57% for crop residues (corn stover) and 67% yield for woody feedstocks (tulip poplar). These results, as well as the solid char yields, are similar to those obtained for the same feedstock using a circulating fluidized bed. Tests conducted without HTM resulted in lower bio-oil yields (ranging from 8 to 18% decrease in yield) and higher char yields with similar changes in magnitude, which is indicative of slow pyrolysis. In addition, a comprehensive study and analysis of the material residence time and mixing characteristics of the novel auger-paddle system is presented. These results demonstrate that an auger-paddle configuration is capable of achieving the high heating rates required for fast pyrolysis.

Original languageEnglish
Pages (from-to)124-132
Number of pages9
JournalFuel Processing Technology
Volume171
DOIs
StatePublished - 1 Mar 2018
Externally publishedYes

Keywords

  • Augers
  • Bio-oil
  • Biomass
  • Fast pyrolysis
  • Paddle reactor

ASJC Scopus subject areas

  • General Chemical Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology

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