Solid-state phase stabilities of relevance to metal dusting in coal gasifier environments
| Autor: | Jackson H. DeVan, Peter F. Tortorelli, Ian G. Wright, Roddie R. Judkins |
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| Rok vydání: | 1998 |
| Předmět: |
Mechanical Engineering
Metallurgy Metals and Alloys chemistry.chemical_element General Medicine complex mixtures Sulfur Oxygen Surfaces Coatings and Films Carbide Coal gasifier chemistry Mechanics of Materials Phase (matter) Metal dusting Materials Chemistry Environmental Chemistry Degradation (geology) Coal gasification |
| Zdroj: | Materials and Corrosion. 49:340-344 |
| ISSN: | 1521-4176 0947-5117 |
| Popis: | Thermochemical calculations involving some typical mixed-gas environments and temperatures of gasifiers were used to examine iron-based phase stabilities to assess the potential for metal dusting in coal gasification systems. The results indicated that Fe 3 C is only stable under conditions when certain reactions are suppressed and that FeO and Fe 0.877S tend to form instead of the carbide. Assuming Fe3C is a necessary step in the metal dusting of steels, there are therefore numerous coal gasification systems where this type of carbon-related degradation will not occur, particularly under conditions associated with higher oxygen and sulfur activities. |
| Databáze: | OpenAIRE |
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