| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1464369 | Ceramics International | 2008 | 5 Pages |
Abstract
The economic viability of converting coal into clean burning liquid fuels in slagging coal gasifiers is compromised by the limited service lifetime of hot-face refractories. One of the most severe refractory degradation mechanisms is spalling, which can occur by either volume-expansion phenomena (compressive stresses) or by volume-shrinkage phenomena (tensile stresses). A volume-shrinkage model is benchmarked to high-chromia refractory material properties and performance under gasifier operating conditions. The model is found to be appropriate for first-order estimates of gasifier refractory lifetime when the apparent diffusivity of volatized Cr in the refractory includes the effects of slag-filled pores and cracks.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
R.E. Williford, K.I. Johnson, S.K. Sundaram,