Radial voidage variation in CFB risers

Allan S. Issangya; John R. Grace; Dingrong Bai; Jingxu Zhu

doi:10.1002/cjce.5450790211

Radial voidage variation in CFB risers

Allan S. Issangya, John R. Grace, Dingrong Bai, Jingxu Zhu

Research output: Journal Publication › Article › peer-review

33 Citations (Scopus)

Abstract

A new correlation for estimating local voidage in CFB risers is provided based on data obtained in a riser of diameter 76 mm and height 6 m using FCC particles at superficial gas velocities between 4 and 8 m/s and solids circulation fluxes up to 425 kg/m²·s. This equation also works well for a wide range of operating conditions and risers of larger size and for other particles. The correlation appears to have broader applicability than previous ones. It is especially useful for estimating the local voidage in the dense zone of CFB risers and CFB risers operating under the dense suspension upflow regime where few experimental data are currently available.

Original language	English
Pages (from-to)	279-286
Number of pages	8
Journal	Canadian Journal of Chemical Engineering
Volume	79
Issue number	2
DOIs	https://doi.org/10.1002/cjce.5450790211
Publication status	Published - 2001
Externally published	Yes

Keywords

Circulating fluidized beds
Gas-solids flows
Hydrodynamics
Local voidage correlations

ASJC Scopus subject areas

General Chemical Engineering

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10.1002/cjce.5450790211

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title = "Radial voidage variation in CFB risers",

abstract = "A new correlation for estimating local voidage in CFB risers is provided based on data obtained in a riser of diameter 76 mm and height 6 m using FCC particles at superficial gas velocities between 4 and 8 m/s and solids circulation fluxes up to 425 kg/m2·s. This equation also works well for a wide range of operating conditions and risers of larger size and for other particles. The correlation appears to have broader applicability than previous ones. It is especially useful for estimating the local voidage in the dense zone of CFB risers and CFB risers operating under the dense suspension upflow regime where few experimental data are currently available.",

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AU - Issangya, Allan S.

AU - Grace, John R.

AU - Bai, Dingrong

AU - Zhu, Jingxu

PY - 2001

Y1 - 2001

N2 - A new correlation for estimating local voidage in CFB risers is provided based on data obtained in a riser of diameter 76 mm and height 6 m using FCC particles at superficial gas velocities between 4 and 8 m/s and solids circulation fluxes up to 425 kg/m2·s. This equation also works well for a wide range of operating conditions and risers of larger size and for other particles. The correlation appears to have broader applicability than previous ones. It is especially useful for estimating the local voidage in the dense zone of CFB risers and CFB risers operating under the dense suspension upflow regime where few experimental data are currently available.

AB - A new correlation for estimating local voidage in CFB risers is provided based on data obtained in a riser of diameter 76 mm and height 6 m using FCC particles at superficial gas velocities between 4 and 8 m/s and solids circulation fluxes up to 425 kg/m2·s. This equation also works well for a wide range of operating conditions and risers of larger size and for other particles. The correlation appears to have broader applicability than previous ones. It is especially useful for estimating the local voidage in the dense zone of CFB risers and CFB risers operating under the dense suspension upflow regime where few experimental data are currently available.

KW - Circulating fluidized beds

KW - Gas-solids flows

KW - Hydrodynamics

KW - Local voidage correlations

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DO - 10.1002/cjce.5450790211

M3 - Article

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SN - 0008-4034

VL - 79

SP - 279

EP - 286

JO - Canadian Journal of Chemical Engineering

JF - Canadian Journal of Chemical Engineering

IS - 2

ER -

Radial voidage variation in CFB risers

Abstract

Keywords

ASJC Scopus subject areas

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