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Cocurrent downflow circulating fluidized bed (downer) reactors — A state of the art review
Author(s) -
Zhu J.X.,
Yu Z.Q.,
Jin Y.,
Grace J. R.,
Issangya A.
Publication year - 1995
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450730510
Subject(s) - fluidized bed , fluidized bed combustion , waste management , flow (mathematics) , materials science , mechanics , environmental science , nuclear engineering , process engineering , engineering , physics
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.