- Author
-
Hastie, J. W.
|
Bonnell, D. W.
|
Plante, E. R.
|
Horton, W. S.
- Title
- Vaporization and Chemical Transport Under Coal Gasification Conditions.
- Coporate
- National Bureau of Standards, Gaithersburg, MD
- Sponsor
- Department of Energy, Washington, DC
- Report
-
NBSIR 80-2178,
December 1980,
138 p.
- Distribution
- Available from National Technical Information Service
- Contract
- CONTRACT-EA-77-A-01-6010
- Keywords
-
coal
|
transportation
|
metal vapors
|
quantitative analysis
- Abstract
- The present studies have resulted in the development of a new experimental technique, transpiration mass spectrometry, for the quantitative analysis of high vapor temperature gases and vapors. This technique has been applied to vapor transport and thermodynamic activity determinations for real and synthetic coal slag samples in reactive coal gas components at atmospheric pressure. The results indicate a highly non-ideal and non-monotonic (with temperature and composition variables) behavior for alkali metal vapor transport. Thus a priori predications of alkali metal transport in coal gasifiers without actual activity data are virtually impossible at the present time. Surface segregation and diffusion limitations of alkali species in slags are also possible complicating effects.