Experimental study on reactor performance of gas–solids low-velocity fluidized beds

Jiangshan Liu; Jesse Zhu

doi:10.1016/j.partic.2021.08.006

Experimental study on reactor performance of gas–solids low-velocity fluidized beds

Jiangshan Liu, Jesse Zhu

Research output: Journal Publication › Article › peer-review

6 Citations (Scopus)

Abstract

Reactor performance of bubbling fluidized bed (BFB) and turbulent fluidized bed (TFB) was carefully examined and systematically compared using catalytic ozone decomposition as a model reaction, based on a complete mapping of local flow structures and spatial distributions of ozone conversion and solids holdup. TFB clearly has a higher conversion and shows better reactor performance than BFB as a result of the vigorously turbulent flow and the relatively homogeneous gas–solids mixing in TEB. Besides, the intensive interaction between gas and solids in TFB leads to greater gas–solids contact efficiency of TFB over that of BFB. Due to gas bypassing and backmixing caused by bubbling behaviours and two-phase structure, BFB deviates significantly from a plug flow reactor and sometimes from a continuously stirred tank reactor. The flow structures essentially dictate the reactor performance in the low-velocity fluidized beds.

Original language	English
Pages (from-to)	21-28
Number of pages	8
Journal	Particuology
Volume	66
DOIs	https://doi.org/10.1016/j.partic.2021.08.006
Publication status	Published - Jul 2022
Externally published	Yes

Keywords

Bubbling fluidized bed
Conversion distribution
Flow structure
Gas–solids contact efficiency
Reactor performance
Turbulent fluidized bed

ASJC Scopus subject areas

General Chemical Engineering
General Materials Science

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10.1016/j.partic.2021.08.006

Cite this

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title = "Experimental study on reactor performance of gas–solids low-velocity fluidized beds",

abstract = "Reactor performance of bubbling fluidized bed (BFB) and turbulent fluidized bed (TFB) was carefully examined and systematically compared using catalytic ozone decomposition as a model reaction, based on a complete mapping of local flow structures and spatial distributions of ozone conversion and solids holdup. TFB clearly has a higher conversion and shows better reactor performance than BFB as a result of the vigorously turbulent flow and the relatively homogeneous gas–solids mixing in TEB. Besides, the intensive interaction between gas and solids in TFB leads to greater gas–solids contact efficiency of TFB over that of BFB. Due to gas bypassing and backmixing caused by bubbling behaviours and two-phase structure, BFB deviates significantly from a plug flow reactor and sometimes from a continuously stirred tank reactor. The flow structures essentially dictate the reactor performance in the low-velocity fluidized beds.",

keywords = "Bubbling fluidized bed, Conversion distribution, Flow structure, Gas–solids contact efficiency, Reactor performance, Turbulent fluidized bed",

author = "Jiangshan Liu and Jesse Zhu",

note = "Publisher Copyright: {\textcopyright} 2021 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences",

year = "2022",

month = jul,

doi = "10.1016/j.partic.2021.08.006",

language = "English",

volume = "66",

pages = "21--28",

journal = "Particuology",

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AU - Liu, Jiangshan

AU - Zhu, Jesse

PY - 2022/7

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AB - Reactor performance of bubbling fluidized bed (BFB) and turbulent fluidized bed (TFB) was carefully examined and systematically compared using catalytic ozone decomposition as a model reaction, based on a complete mapping of local flow structures and spatial distributions of ozone conversion and solids holdup. TFB clearly has a higher conversion and shows better reactor performance than BFB as a result of the vigorously turbulent flow and the relatively homogeneous gas–solids mixing in TEB. Besides, the intensive interaction between gas and solids in TFB leads to greater gas–solids contact efficiency of TFB over that of BFB. Due to gas bypassing and backmixing caused by bubbling behaviours and two-phase structure, BFB deviates significantly from a plug flow reactor and sometimes from a continuously stirred tank reactor. The flow structures essentially dictate the reactor performance in the low-velocity fluidized beds.

KW - Bubbling fluidized bed

KW - Conversion distribution

KW - Flow structure

KW - Gas–solids contact efficiency

KW - Reactor performance

KW - Turbulent fluidized bed

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ER -

Experimental study on reactor performance of gas–solids low-velocity fluidized beds

Abstract

Keywords

ASJC Scopus subject areas

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