Record Display for the EPA National Library Catalog

RECORD NUMBER: 22 OF 39

OLS Field Name OLS Field Data
Main Title High-Temperature, Short-Time Sulfation of Calcium-Based Sorbents. 1. Theoretical Sulfation Model.
Author Milne, C. R. ; Silcox, G. D. ; Pershing, D. W. ; Kirchgessner, D. A. ;
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-R811001; EPA/600/J-90/314;
Stock Number PB91-146688
Additional Subjects Air pollution control ; Sorbents ; Injection ; Sulfation ; Mathematical models ; Sulfur dioxide ; Calcium carbonates ; Calcium hydroxides ; High temperature tests ; Roasting ; Diffusion ; Area ; Temperature ; Partial pressure ; Porosity ; Reprints ;
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB91-146688 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/13/1991
Collation 13p
Abstract
The paper discusses a mathematical model for the sulfation of CaO, developed around the overlapping grain concept. The potential influence of high mass-transfer rates from simultaneous calcination of CaCO3 or Ca(OH)2 is incorporated in the mass-transfer coefficient for SO2 diffusion to the particle. A solution scheme for the nonlinear differential equation governing pore diffusion with changing particle structure is developed. The influence of grain overlap on product-layer diffusion is quantified. The model predictions show good agreement with published, fundamental differential reactor data which include the influences of surface area, temperature, and SO2 partial pressure. (Copyright (c) 1990 American Chemical Society.)