Experimental investigation of the effects of particle properties on solids holdup in an LSCFB riser

Long Sang; Jesse Zhu

doi:10.1016/j.cej.2012.05.048

Experimental investigation of the effects of particle properties on solids holdup in an LSCFB riser

Long Sang, Jesse Zhu

Research output: Journal Publication › Article › peer-review

26 Citations (Scopus)

Abstract

The effects of particle properties (density and size) on solids holdup (e{open}_s) in the riser of a Liquid-Solid Circulating Fluidized Bed (LSCFB) were investigated experimentally based on three parameters: the superficial liquid velocity (U_l), the normalized superficial liquid velocity (U_l/. U_t) and the excess superficial liquid velocity (U_l- U_t). The results showed that the excess superficial liquid velocity (U_l- U_t) among those three parameters is a more appropriate parameter to evaluate the effects of the particle properties on the solids holdup (e{open}_s), facilitating general and direct comparisons for different types of particles. A discussion on the force balance of the particles revealed that the excess superficial liquid velocity (U_l- U_t) is approximately equivalent to the average particle velocity (VP) when the solids holdup (e{open}_s) is less than 0.1. Also the solids holdup (e{open}_s) is a function of superficial solids velocity (U_s) and particle velocity (V_p), expressed quantitatively in terms of average value as εs=Us/VP=Us/(Ul-Ut) when εs<0.1.

Original language	English
Pages (from-to)	322-329
Number of pages	8
Journal	Chemical Engineering Journal
Volume	197
DOIs	https://doi.org/10.1016/j.cej.2012.05.048
Publication status	Published - 15 Jul 2012
Externally published	Yes

Keywords

Excess superficial liquid velocity
Liquid-Solid Circulating Fluidized Bed (LSCFB)
Normalized superficial liquid velocity
Particle properties
Particle velocity
Solids holdup
Terminal velocity

ASJC Scopus subject areas

General Chemistry
Environmental Chemistry
General Chemical Engineering
Industrial and Manufacturing Engineering

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10.1016/j.cej.2012.05.048

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title = "Experimental investigation of the effects of particle properties on solids holdup in an LSCFB riser",

abstract = "The effects of particle properties (density and size) on solids holdup (e{open}s) in the riser of a Liquid-Solid Circulating Fluidized Bed (LSCFB) were investigated experimentally based on three parameters: the superficial liquid velocity (Ul), the normalized superficial liquid velocity (Ul/. Ut) and the excess superficial liquid velocity (Ul- Ut). The results showed that the excess superficial liquid velocity (Ul- Ut) among those three parameters is a more appropriate parameter to evaluate the effects of the particle properties on the solids holdup (e{open}s), facilitating general and direct comparisons for different types of particles. A discussion on the force balance of the particles revealed that the excess superficial liquid velocity (Ul- Ut) is approximately equivalent to the average particle velocity (VP) when the solids holdup (e{open}s) is less than 0.1. Also the solids holdup (e{open}s) is a function of superficial solids velocity (Us) and particle velocity (Vp), expressed quantitatively in terms of average value as εs=Us/VP=Us/(Ul-Ut) when εs<0.1.",

keywords = "Excess superficial liquid velocity, Liquid-Solid Circulating Fluidized Bed (LSCFB), Normalized superficial liquid velocity, Particle properties, Particle velocity, Solids holdup, Terminal velocity",

author = "Long Sang and Jesse Zhu",

note = "Funding Information: Financial supports from the Natural Sciences and Engineering Research Council of Canada and from The University of Western Ontario are greatly acknowledged.",

year = "2012",

month = jul,

day = "15",

doi = "10.1016/j.cej.2012.05.048",

language = "English",

volume = "197",

pages = "322--329",

journal = "Chemical Engineering Journal",

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T1 - Experimental investigation of the effects of particle properties on solids holdup in an LSCFB riser

AU - Sang, Long

AU - Zhu, Jesse

N1 - Funding Information: Financial supports from the Natural Sciences and Engineering Research Council of Canada and from The University of Western Ontario are greatly acknowledged.

PY - 2012/7/15

Y1 - 2012/7/15

N2 - The effects of particle properties (density and size) on solids holdup (e{open}s) in the riser of a Liquid-Solid Circulating Fluidized Bed (LSCFB) were investigated experimentally based on three parameters: the superficial liquid velocity (Ul), the normalized superficial liquid velocity (Ul/. Ut) and the excess superficial liquid velocity (Ul- Ut). The results showed that the excess superficial liquid velocity (Ul- Ut) among those three parameters is a more appropriate parameter to evaluate the effects of the particle properties on the solids holdup (e{open}s), facilitating general and direct comparisons for different types of particles. A discussion on the force balance of the particles revealed that the excess superficial liquid velocity (Ul- Ut) is approximately equivalent to the average particle velocity (VP) when the solids holdup (e{open}s) is less than 0.1. Also the solids holdup (e{open}s) is a function of superficial solids velocity (Us) and particle velocity (Vp), expressed quantitatively in terms of average value as εs=Us/VP=Us/(Ul-Ut) when εs<0.1.

AB - The effects of particle properties (density and size) on solids holdup (e{open}s) in the riser of a Liquid-Solid Circulating Fluidized Bed (LSCFB) were investigated experimentally based on three parameters: the superficial liquid velocity (Ul), the normalized superficial liquid velocity (Ul/. Ut) and the excess superficial liquid velocity (Ul- Ut). The results showed that the excess superficial liquid velocity (Ul- Ut) among those three parameters is a more appropriate parameter to evaluate the effects of the particle properties on the solids holdup (e{open}s), facilitating general and direct comparisons for different types of particles. A discussion on the force balance of the particles revealed that the excess superficial liquid velocity (Ul- Ut) is approximately equivalent to the average particle velocity (VP) when the solids holdup (e{open}s) is less than 0.1. Also the solids holdup (e{open}s) is a function of superficial solids velocity (Us) and particle velocity (Vp), expressed quantitatively in terms of average value as εs=Us/VP=Us/(Ul-Ut) when εs<0.1.

KW - Excess superficial liquid velocity

KW - Liquid-Solid Circulating Fluidized Bed (LSCFB)

KW - Normalized superficial liquid velocity

KW - Particle properties

KW - Particle velocity

KW - Solids holdup

KW - Terminal velocity

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DO - 10.1016/j.cej.2012.05.048

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EP - 329

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

ER -

Experimental investigation of the effects of particle properties on solids holdup in an LSCFB riser

Abstract

Keywords

ASJC Scopus subject areas

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