Cocurrent downflow circulating fluidized bed (downer) reactors — A state of the art review

J. ‐X Zhu, Z. ‐Q Yu, Y. Jin, J. R. Grace, A. Issangya

Research output: Journal PublicationReview articlepeer-review

218 Citations (Scopus)


In the last decade, cocurrent downflow circulating fluidized bed reactors, called “downer” reactors, have been proposed as an alternative to upflow circulating fluidized bed, or “riser”, reactors. In this paper, published results on downer studies are summarized and future directions of research are recommended. Downer reactors are shown to have several distinct advantages over upflow circulating fluidized bed reactors and can potentially be used in many industrial processes, mainly due to a more uniform gas and solids flow structure compared with risers.

Original languageEnglish
Pages (from-to)662-677
Number of pages16
JournalCanadian Journal of Chemical Engineering
Issue number5
Publication statusPublished - Oct 1995
Externally publishedYes


  • co‐current downflow
  • downer reactor
  • fluidized bed
  • short contact reactor

ASJC Scopus subject areas

  • General Chemical Engineering


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