Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Reaction Kinetics of Ca-Based Sorbents with HC1.
Author Gulett, B. K. ; Jozewicz, W. ; Stefanski, L. A. ;
CORP Author Acurex Environmental Corp., Research Triangle Park, NC.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
Publisher c1992
Year Published 1992
Report Number EPA-68-D0-0141; EPA/600/J-92/411;
Stock Number PB93-131860
Additional Subjects Hydrogen chloride ; Reaction kinetics ; Sorbents ; Calcium compounds ; Air pollution control ; Combustion products ; Sulfur dioxide ; Mass transfer ; Diffusion ; High temperature tests ; Municiple wastes ; Waste disposal ; Calcium oxides ; Chemical reactions ; Reprints ;
Library Call Number Additional Info Location Last
NTIS  PB93-131860 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/12/1993
Collation 13p
The paper gives results of an investigation of the kinetics of the reaction between CaO and HCl under conditions that minimize bulk mass transfer and pore diffusion limitations. Reactivity data from 0.2 to 1 s exposure to 5000 ppm HCl in a fixed-bed reactor were analyzed by a shrinking core model of diffusion and chemical reaction control, either singly or in combination. Between 150 and 350 C, the reaction is controlled by gaseous diffusion through the developing product layer. The apparent activation energy is about 28.1 kJ/mol (6.7 kcal/mol), and the reaction is first order with respect to HCl concentration. Reactivity is a minor function of the measured particle size and surface area, likely due to the agglomerative nature of the individual grains that comprise the particle structure and complicate the interpretation of these measured values. Extrapolation of these results to the high temperature, furnace sorbent injection process provides preliminary agreement with pilot scale tests. (Copyright (c) 1992 American Chemical Society.)