An experimental and modeling study of ash deposition behaviour for co-firing peat with lignite

Yuanyuan Shao, Jinsheng Wang, Chunbao Charles Xu, Jesse Zhu, Fernando Preto, Guy Tourigny, Chadi Badour, Hanning Li

Research output: Journal PublicationArticlepeer-review

31 Citations (Scopus)

Abstract

Co-firing peat with lignite for power generation was studied at pilot-scale, focusing on the issue of ash deposition, the major concern for this application. A specially designed probe was used to measure the rate of ash deposition under similar conditions of power plant boiler operation. Fraction of peat in the feed was varied up to 100%. It was observed that whereas the ash deposition decreased in general with increasing fraction of low-ash peat, the decrease was significantly less than expected from ash content of the feed, suggesting higher deposition tendency of ash from the peat. Chlorine content in the deposited ash showed a maximum at a certain blend ratio of the feed, which could not be explained by fuel chlorine content alone. The ash and chlorine deposition behaviour has been analyzed and simulated by mathematical models where interactions between fuel chlorine, alkali and ash particles are parameterized. The models ought to be useful for control and optimization purposes, and also be useful for co-firing other fuel blends.

Original languageEnglish
Pages (from-to)2635-2640
Number of pages6
JournalApplied Energy
Volume88
Issue number8
DOIs
Publication statusPublished - Aug 2011
Externally publishedYes

Keywords

  • Ash deposition
  • Chlorine
  • Co-firing
  • Fluidized bed
  • Peat

ASJC Scopus subject areas

  • Building and Construction
  • Mechanical Engineering
  • Energy (all)
  • Management, Monitoring, Policy and Law

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