The modelling of the generation of volátiles, H2 and CO, and their simultaneous diffusion controlled oxidation, in pulverized coal furnaces

Bermúdez de Castro López Varela, Alfredo and Ferrín, J.L. and Liñán Martínez, Amable (2007). The modelling of the generation of volátiles, H2 and CO, and their simultaneous diffusion controlled oxidation, in pulverized coal furnaces. "Combustion Theory and Modelling", v. 11 (n. 6); pp. 949-976. ISSN 1364-7830.

Description

Title: The modelling of the generation of volátiles, H2 and CO, and their simultaneous diffusion controlled oxidation, in pulverized coal furnaces
Author/s:
  • Bermúdez de Castro López Varela, Alfredo
  • Ferrín, J.L.
  • Liñán Martínez, Amable
Item Type: Article
Título de Revista/Publicación: Combustion Theory and Modelling
Date: 2007
ISSN: 1364-7830
Volume: 11
Subjects:
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 purpose of this paper is to contribute to the mathematical modelling of the combustión of coal particles in pulverized coal furnaces. The model deals with the gas and solid phases of the flow. For the coal particles a Lagrangian description is used, taking into account the simultaneous processes of moisture evaporation and devolatilization together with the heterogeneous gasification reactions of the char. An Eulerian description will be used for the distributions of temperature and concentrations in the gas phase, with the effect of the particles represented by volumetric sources of heat, mass and momentum. The gas phase oxidation reactions of the volátiles, H2 and CO will be modelled using the assumption of infinitely fast rates; the Burke-Schumann analysis will be generalized to account for the competition for oxygen of CO, H2 and the volátiles. These reactions may occur, in the form of group combustión, in a gaseous thin diffusion fíame separating a región without oxygen, where the coal particles genérate volátiles, H2 and CO, from a región with oxygen, where the reactions may occur inside the particles or, outside, in diffusion flames surrounding the individual particles, even though for small particle sizes the gas phase reactions can be considered as frozen near the particles. The analysis will provide relations for the volumetric soürces appearing in the gas phase description, and for the rates that determine the evolution of the temperature and mass content of moisture, volátiles and char in the particles.

More information

Item ID: 1362
DC Identifier: http://oa.upm.es/1362/
OAI Identifier: oai:oa.upm.es:1362
Official URL: http://www.tandf.co.uk/journals/titles/13647830.asp.asp
Deposited by: Biblioteca ETSI Aeronauticos
Deposited on: 04 Mar 2009
Last Modified: 20 Apr 2016 06:48
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