Record Display for the EPA National Library Catalog


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 ;
Library Call Number Additional Info Location Last
NTIS  PB91-116871 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 13p
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.)