Numerical study of coal particle cluster combustion under quiescent conditions

Shuyan Wang, Huilin Lu, Yunhua Zhao, Reza Mostofi, Ho Young Kim, Lijie Yin

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Behavior of ignition and combustion of coal particle cluster under a quiescent condition was numerically simulated by solving balance equations of mass and enthalpy with combustion kinetic models of volatiles and char. Two-flame structure, one flame penetrating into the cluster and the other moving out of the cluster, was predicted during the combustion of coal particle cluster. Effects of radiative heat transfer, group number, ambient temperature, coal particle size, and oxygen concentration on ignition and combustion of coal particle clusters were also analyzed. Simulations indicated that the gas volume fraction of coal particle cluster increases with time after devolatilization. Gas velocity passing through the cluster surface varied significantly at volatile liberation. The ignition time delay was reduced with the increase of ambient temperature. The cluster devolatilization rate and char burning rate increased while the ignition time delay decreased with the increase of ambient oxygen concentration.

Original languageEnglish
Pages (from-to)4336-4347
Number of pages12
JournalChemical Engineering Science
Volume62
Issue number16
DOIs
Publication statusPublished - 2007 Aug 1

Fingerprint

Coal
Combustion
Numerical Study
Ignition
Time delay
Gases
Volatiles
Oxygen
Flame
Time Delay
Enthalpy
Volume fraction
Radiative Heat Transfer
Particle size
Balance Equations
Heat transfer
Kinetic Model
Temperature
Particle Size
Volume Fraction

Keywords

  • Coal cluster
  • Group combustion
  • Ignition

ASJC Scopus subject areas

  • Chemical Engineering(all)

Cite this

Numerical study of coal particle cluster combustion under quiescent conditions. / Wang, Shuyan; Lu, Huilin; Zhao, Yunhua; Mostofi, Reza; Kim, Ho Young; Yin, Lijie.

In: Chemical Engineering Science, Vol. 62, No. 16, 01.08.2007, p. 4336-4347.

Research output: Contribution to journalArticle

Wang, Shuyan ; Lu, Huilin ; Zhao, Yunhua ; Mostofi, Reza ; Kim, Ho Young ; Yin, Lijie. / Numerical study of coal particle cluster combustion under quiescent conditions. In: Chemical Engineering Science. 2007 ; Vol. 62, No. 16. pp. 4336-4347.
@article{9f37e5183d5a4549a0aa3d6dc17dbe98,
title = "Numerical study of coal particle cluster combustion under quiescent conditions",
abstract = "Behavior of ignition and combustion of coal particle cluster under a quiescent condition was numerically simulated by solving balance equations of mass and enthalpy with combustion kinetic models of volatiles and char. Two-flame structure, one flame penetrating into the cluster and the other moving out of the cluster, was predicted during the combustion of coal particle cluster. Effects of radiative heat transfer, group number, ambient temperature, coal particle size, and oxygen concentration on ignition and combustion of coal particle clusters were also analyzed. Simulations indicated that the gas volume fraction of coal particle cluster increases with time after devolatilization. Gas velocity passing through the cluster surface varied significantly at volatile liberation. The ignition time delay was reduced with the increase of ambient temperature. The cluster devolatilization rate and char burning rate increased while the ignition time delay decreased with the increase of ambient oxygen concentration.",
keywords = "Coal cluster, Group combustion, Ignition",
author = "Shuyan Wang and Huilin Lu and Yunhua Zhao and Reza Mostofi and Kim, {Ho Young} and Lijie Yin",
year = "2007",
month = "8",
day = "1",
doi = "10.1016/j.ces.2007.04.025",
language = "English",
volume = "62",
pages = "4336--4347",
journal = "Chemical Engineering Science",
issn = "0009-2509",
publisher = "Elsevier BV",
number = "16",

}

TY - JOUR

T1 - Numerical study of coal particle cluster combustion under quiescent conditions

AU - Wang, Shuyan

AU - Lu, Huilin

AU - Zhao, Yunhua

AU - Mostofi, Reza

AU - Kim, Ho Young

AU - Yin, Lijie

PY - 2007/8/1

Y1 - 2007/8/1

N2 - Behavior of ignition and combustion of coal particle cluster under a quiescent condition was numerically simulated by solving balance equations of mass and enthalpy with combustion kinetic models of volatiles and char. Two-flame structure, one flame penetrating into the cluster and the other moving out of the cluster, was predicted during the combustion of coal particle cluster. Effects of radiative heat transfer, group number, ambient temperature, coal particle size, and oxygen concentration on ignition and combustion of coal particle clusters were also analyzed. Simulations indicated that the gas volume fraction of coal particle cluster increases with time after devolatilization. Gas velocity passing through the cluster surface varied significantly at volatile liberation. The ignition time delay was reduced with the increase of ambient temperature. The cluster devolatilization rate and char burning rate increased while the ignition time delay decreased with the increase of ambient oxygen concentration.

AB - Behavior of ignition and combustion of coal particle cluster under a quiescent condition was numerically simulated by solving balance equations of mass and enthalpy with combustion kinetic models of volatiles and char. Two-flame structure, one flame penetrating into the cluster and the other moving out of the cluster, was predicted during the combustion of coal particle cluster. Effects of radiative heat transfer, group number, ambient temperature, coal particle size, and oxygen concentration on ignition and combustion of coal particle clusters were also analyzed. Simulations indicated that the gas volume fraction of coal particle cluster increases with time after devolatilization. Gas velocity passing through the cluster surface varied significantly at volatile liberation. The ignition time delay was reduced with the increase of ambient temperature. The cluster devolatilization rate and char burning rate increased while the ignition time delay decreased with the increase of ambient oxygen concentration.

KW - Coal cluster

KW - Group combustion

KW - Ignition

UR - http://www.scopus.com/inward/record.url?scp=34447319623&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34447319623&partnerID=8YFLogxK

U2 - 10.1016/j.ces.2007.04.025

DO - 10.1016/j.ces.2007.04.025

M3 - Article

AN - SCOPUS:34447319623

VL - 62

SP - 4336

EP - 4347

JO - Chemical Engineering Science

JF - Chemical Engineering Science

SN - 0009-2509

IS - 16

ER -