Validation and Application of a Kinetic Model for Downdraft Biomass Gasification Simulation

Joseph D. Smith*, Anand Alembath, Haider Al-Rubaye, Jia Yu, Xi Gao, Hassan Golpour

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

36 Scopus citations


Biomass gasification is widely recognized as an effective method to obtain renewable energy. To accurately predict the syngas and tar compositions is a challenge. A chemical reaction kinetics model based on comprehensive gasification kinetics is proposed to simulate downdraft biomass gasification. The kinetic model is validated by direct comparison to experimental results of two downdraft gasifiers available in the literature and is found to be more accurate than the widely used Gibbs energy-minimizing model (GEM model). The kinetic model is then applied to investigate the effects of equivalence ratio (ER), gasification temperature, biomass moisture content, and biomass composition on syngas and tar production. Accurate water-gas shift and CO shift reaction kinetics are found critical to achieve good agreement with experimental results.

Original languageEnglish
Pages (from-to)2505-2519
Number of pages15
JournalChemical Engineering and Technology
Issue number12
StatePublished - 1 Dec 2019
Externally publishedYes


  • Biomass gasification
  • Downdraft gasifier
  • Gasification
  • Reaction kinetics


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