This paper addresses the fate of coal particles during entrained-flow gasification. More specifically, the relative importance of the parallel pathways of coal conversion associated with either entrained-flow of particles in the dispersed phase or migration of the particles to the molten ash slag and possible gasification thereon is assessed. To this end a simple 1.5D model has been set up starting from a conceptual analysis of particle-slag micromechanics. Results suggested that the role of the slag on late carbon conversion is significant, and highlighted the need of a proper choice of parameters such as slag viscosity and velocity, carbon flux impacting the slag and overall bulk-to-wall mass-transfer coefficient.

The role of slag formation on late carbon conversion in entrained flow gasification of coal

MONTAGNARO, FABIO;SALATINO, PIERO
2009

Abstract

This paper addresses the fate of coal particles during entrained-flow gasification. More specifically, the relative importance of the parallel pathways of coal conversion associated with either entrained-flow of particles in the dispersed phase or migration of the particles to the molten ash slag and possible gasification thereon is assessed. To this end a simple 1.5D model has been set up starting from a conceptual analysis of particle-slag micromechanics. Results suggested that the role of the slag on late carbon conversion is significant, and highlighted the need of a proper choice of parameters such as slag viscosity and velocity, carbon flux impacting the slag and overall bulk-to-wall mass-transfer coefficient.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/364594
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