Combustion and air emissions from co-firing a wood biomass, a Canadian peat and a Canadian lignite coal in a bubbling fluidised bed combustor

Chadi Badour, Allan Gilbert, Charles Xu, Hanning Li, Yuanyuan Shao, Guy Tourigny, Fernando Preto

Research output: Journal PublicationArticlepeer-review

22 Citations (Scopus)

Abstract

The effects of particle size, fuel blending ratio, moisture content and excess air ratio on combustion efficiency and air emissions (CO 2, CO, SO 2 and NO x) from the co-combustion of white pine or peat with a Canadian lignite coal, were examined in a pilot-scale bubbling fluidised bed combustor. Pelletising was important for the efficient combustion of wood due to its high volatile content. Co-firing lignite and pine pellets gave a proportional reduction in SO 2 and NO x emissions with blending ratio, while co-firing of peat and lignite resulted in increased SO 2 emissions, but decreased NO x emissions. Moisture promotes combustion but with increased CO emissions, and results in increased NO x emissions, and decreased SO 2 emissions. High excess air decreased CO, but moderately increased SO 2 and NO x emissions.

Original languageEnglish
Pages (from-to)1170-1177
Number of pages8
JournalCanadian Journal of Chemical Engineering
Volume90
Issue number5
DOIs
Publication statusPublished - Oct 2012
Externally publishedYes

Keywords

  • Air emissions
  • Co-firing
  • Combustion efficiency
  • Fluidised bed
  • Lignite
  • Peat
  • Wood biomass

ASJC Scopus subject areas

  • General Chemical Engineering

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