||Calcination and Sintering Models for Application to High-Temperature, Short-Time Sulfation of Calcium-Based Sorbents.
Milne, C. R. ;
Silcox, G. D. ;
Pershing., D. W. ;
||Utah Univ., Salt Lake City. Dept. of Chemical Engineering.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
Calcium hydroxides ;
Calcium carbonates ;
Mathematical models ;
Surface chemistry ;
Combustion products ;
Air pollution ;
Electron microscopy ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||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.)
||Pub. in I and EC Research, v29 n2 p139-149 1990. Sponsored by Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
|NTIS Title Notes
||Journal article Sep 86-Sep 88.
||Reprint: Calcination and Sintering Models for Application to High-Temperature, Short-Time Sulfation of Calcium-Based Sorbents.
||99F; 68A; 81A
||PC A03/MF A01