Record Display for the EPA National Library Catalog

RECORD NUMBER: 8 OF 28

OLS Field Name OLS Field Data
Main Title Fundamental Processes Involved in SO2 Capture by Calcium-Based Adsorbents.
Author Gullett, B. K. ; Kramlich, J. C. ;
CORP Author Energy and Environmental Research Corp., Irvine, CA.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
Year Published 1987
Report Number EPA-68-02-4239; EPA/600/D-87/270;
Stock Number PB88-102991
Additional Subjects Sulfur dioxide ; Adsorbents ; Flue gases ; Furnaces ; Calcium ; Electrostatic precipitators ; Coal ; Pollution control ; Stationary sources
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB88-102991 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/21/1988
Collation 16p
Abstract
The paper discusses the fundamental processes in sulfur dioxide (SO2) capture by calcium-based adsorbents for upper furnace, duct, and electrostatic precipitator (ESP) reaction sites. It examines the reactions in light of controlling mechanisms, effect of sorbent physical properties, and important process variables. Upper furnace reactivity is limited to 900-1200 C by rate and equilibrium constraints, respectively. Sulfation is a function of in-situ sorbent characteristics of porosity, particle size, and surface area. Conversion of the sorbent is ultimately limited by the formation of the calcium sulfate (CaSO4) product layer. The in-duct reaction is accomplished through sorbent scavenging in the flue gas stream by a water spray. The scavenging efficiency of the sorbent by the water droplets limits the process, while reaction is controlled by the dissolution rate of the sorbent. The E-SOX process in a modified ESP simulates a short time spray dryer through injection of a calcium hydroxide--Ca(OH)2--slurry. The Ca(OH)2 undergoes aqueous phase reaction to remove SO2. Evaporation of the droplets prior to the ESP field conditions the flue gas for more efficient particulate matter collection by lowering the gas resistivity.