Gasification of torrefied Miscanthus×giganteus in an air-blown bubbling fluidized bed gasifier

G. Xue, M. Kwapinska, A. Horvat, W. Kwapinski, L. P.L.M. Rabou, S. Dooley, K. M. Czajka, J. J. Leahy

Research output: Contribution to journalArticlepeer-review

Abstract

Torrefaction is suggested to be an effective method to improve the fuel properties of biomass and gasification of torrefied biomass should provide a higher quality product gas than that from unprocessed biomass. In this study, both raw and torrefied Miscanthus×giganteus (M×G) were gasified in an air-blown bubbling fluidized bed (BFB) gasifier using olivine as the bed material. The effects of equivalence ratio (ER) (0.18-0.32) and bed temperature (660-850°C) on the gasification performance were investigated. The results obtained suggest the optimum gasification conditions for the torrefied M×G are ER 0.21 and 800°C. The product gas from these process conditions had a higher heating value (HHV) of 6.70MJ/m3, gas yield 2m3/kgbiomass (H2 8.6%, CO 16.4% and CH4 4.4%) and cold gas efficiency 62.7%. The comparison between raw and torrefied M×G indicates that the torrefied M×G is more suitable BFB gasification.

Original languageEnglish
Pages (from-to)397-403
Number of pages7
JournalBioresource Technology
Volume159
DOIs
Publication statusPublished - May 2014

Keywords

  • Biomass
  • Bubbling fluidized bed gasification
  • Mass balance
  • Miscanthus
  • Torrefaction

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