Journal
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
Volume 32, Issue 3, Pages 466-469Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.calphad.2008.07.004
Keywords
Refractory; Thermodynamics; Slag; Gasifier; Corrosion
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Funding
- Office of Fossil Energy, National Energy Technology Laboratory, US Department of Energy [DE-AC05-00OR22725]
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Slagging coal gasifiers suffer corrosive attack on the refractory liner and these interactions were thermochemically simulated. The slag is observed to penetrate the refractory, which complicates modeling the phase behavior of the slag-penetrated interior of the refractory. A simple strategy was adopted such that stepwise changes in composition with decreasing slag content were assumed to account for the compositional changes as slag penetrates the refractory. The thermochemical equilibrium calculations following this strategy typically yielded three solution phases as well as the stoichiometric crystalline phases AlPO4 and Ca-3(PO4)(2) depending on composition/penetration. Under some conditions a slag liquid miscibility gap exists Such that two slag liquids coexist. (C) 2008 Elsevier Ltd. All rights reserved.
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