Thermodynamics and kinetics of coal gasification in a liquid iron bath View Full Text


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Article Info

DATE

1987-06

AUTHORS

I. Barin, M. Modigell, F. Sauert

ABSTRACT

The thermodynamics and kinetics of the Molten-Iron-Pure-Gas (MIP) process used for coal gasification have been analyzed. In the MIP process, oxygen, fine-grained coal, and fluxes are injected into a liquid iron bath to produce a high temperature gas consisting of CO and H2 plus a liquid basic slag. The sulfur is transferred from the coal to this slag. Computer calculations bearing in mind test conditions were used to determine equilibrium conditions as well as mass and energy balances; these indicated that the MIP process is technically feasible. The kinetics of the gasification process have been investigated by analyzing and assessing the basic reactions for a bottom-blowing MIP reactor. A comparison of all relevant reactions reveals that the dissolution of carbon in iron is the rate-determining step of the process. The bath turbulence induced by the injected gas and by the product gas results in intense mixing and dispersion of the reactants and their intermediate products. These phenomena create extremely large mass-transfer surfaces and extend the retention time of the reactants in the liquid iron bath. This results in high conversion rates relative to the volume of the MIP reactor. More... »

PAGES

347-354

References to SciGraph publications

  • 1982-06. Hydrodynamics of gas stirred melts: Part I. Gas/liquid coupling in METALLURGICAL AND MATERIALS TRANSACTIONS B
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    http://scigraph.springernature.com/pub.10.1007/bf02656153

    DOI

    http://dx.doi.org/10.1007/bf02656153

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