Combustion of a coal char particle in a stream of dry gas.

Higuera Antón, Francisco (2008). Combustion of a coal char particle in a stream of dry gas.. "Combustion and Flame", v. 152 (n. 1-2); pp. 230-244. ISSN 0010-2180. https://doi.org/10.1016/j.combustflame.2007.06.001.

Description

Title: Combustion of a coal char particle in a stream of dry gas.
Author/s:
  • Higuera Antón, Francisco
Item Type: Article
Título de Revista/Publicación: Combustion and Flame
Date: January 2008
ISSN: 0010-2180
Volume: 152
Subjects:
Freetext Keywords: coal combustion, pulverized coal , char, moving particle, water vapor concentration, burning carbon particles, point flow field , humid air-flow, pulverized coal , solid carbon, artificial graphite, intrinsic kinetics, oxidation, rates
Faculty: E.T.S.I. Aeronáuticos (UPM)
Department: Motopropulsión y Termofluidodinámica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The burning rate, surface temperature, drag, and extinction conditions of a single char particle moving in a gas are computed numerically. The effects of the size and velocity of the particle and of the temperature and composition of the gas are examined in the framework of a simple model that includes O2 and CO2 heterogeneous reactions and, in some cases, a diffusion-controlled CO oxidation flame in the gas around the particle. In agreement with known results, the burning rate is found to increase with the velocity of the particle when the Reynolds number of the gas flow ceases to be small. The temperature of the particle increases with the temperature and oxygen mass fraction of the gas and is little affected by the size and velocity of the particle, except in the vicinity of extinction. The drag coefficient is a decreasing function of the particle size and velocity in the range of Reynolds numbers that has been analyzed. The presence of CO2 in the gas may have an important effect on the gasification of small particles.

More information

Item ID: 2166
DC Identifier: http://oa.upm.es/2166/
OAI Identifier: oai:oa.upm.es:2166
DOI: 10.1016/j.combustflame.2007.06.001
Official URL: http://www.elsevier.com/wps/find/journaldescription.cws_home/505736/description#description
Deposited by: Memoria Investigacion
Deposited on: 03 Feb 2010 11:40
Last Modified: 10 Jan 2017 10:11
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