Gasification of torrefied Miscanthus giganteus in an air-blown bubbling fluidized bed gasifier Articles uri icon

authors

  • GANG, XUE
  • KWAPINSKA, MARZENA
  • HORVAT, ALEN
  • KWAPINSKI, WITOLD
  • RABOU, LUC P. L. M.
  • DOOLEY, STEPHEN
  • CZAJKA, KRZYSTOF M.
  • LEAHY, JAMES J.

publication date

  • March 2014

start page

  • 397

end page

  • 403

volume

  • 159

International Standard Serial Number (ISSN)

  • 0960-8524

Electronic International Standard Serial Number (EISSN)

  • 1873-2976

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 6.70 MJ/m3, gas yield 2 m3/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.

subjects

  • Industrial Engineering

keywords

  • biomass; miscanthus; torrefaction; bubbling fluidized bed gasification; mass balance