| Main Title |
Calcination and Sintering Models for Application to High-Temperature, Short-Time Sulfation of Calcium-Based Sorbents. |
| Author |
Milne, C. R. ;
Silcox, G. D. ;
Pershing., D. W. ;
|
| CORP Author |
Utah Univ., Salt Lake City. Dept. of Chemical Engineering.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab. |
| Publisher |
c1990 |
| Year Published |
1990 |
| Report Number |
EPA-R-811001; EPA/600/J-90/179; |
| Stock Number |
PB91-116871 |
| Additional Subjects |
Calcium hydroxides ;
Absorbers(Materials) ;
Calcium carbonates ;
Sulfation ;
Mathematical models ;
Roasting ;
Reactivity ;
Surface chemistry ;
Area ;
Combustion products ;
Sintering ;
Air pollution ;
Electron microscopy ;
Graphs(Charts) ;
Reprints ;
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB91-116871 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
13p |
| Abstract |
To simulate the staged availability of transient high surface area CaO observed in high-temperature flow-reactor data, the paper describes the rate of calcination of CaCO3 or Ca(OH)2, using an empirical modification of the shrinking-core model. The physical model depicts particle decomposition by the shrinking-core mechanism. The subsequent time-dependent decrease in CaO reactivity (surface area and porosity) due to sintering is simulated by reducing the grain-center spacing for the matrix of overlapping CaO grains. Information from SEM micrographs and from other physical property measurements of the porous particles is incorporated. The submodel simulates the time-dependent availability and reactivity of CaO for a comprehensive model used to study sulfation of CaCO3 and Ca(OH)2 particles at upper-furnace injection conditions. (Copyright (c) 1990 by the American Chemical Society.) |
