Record Display for the EPA National Library Catalog


Main Title Infrared Spectroscopic Study of Gas-Solid Interactions.
Author Rissman, Edwin F. ;
CORP Author National Air Pollution Control Administration Technical Center, Durham, N.C.
Year Published 1970
Report Number PHS-CPA-22-69-59; 0586;
Stock Number PB-194 136
Additional Subjects ( Air pollution ; Sulfur dioxide) ; ( Adsorption ; Sulfur dioxide) ; ( Adsorbents ; Limestone) ; ( Infrared spectroscopy ; Adsorption) ; Solutions ; EDTA ; Heavy water ; Potassium bromide ; Silicates ; Roasting ; Oxidation ; Reaction kinetics ; Sulfates ; Magnesium oxides ; Hydration ; Calcium oxides ; Carbonates ; Dolomite(Rock) ; Gas surface interactions ; Air pollution control ; Matrix isolation techniques
Library Call Number Additional Info Location Last
NTIS  PB-194 136 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 87p
The aim of the reported research was to apply infrared spectroscopic methods to handle large numbers of process control samples and to obtain kinetic information to evaluate the effects of variables such as sulfur dioxide concentration on overall process efficiencies and to understand the deadburning phenomenon associated with limestone processes for removal of sulfur dioxide from flue gases. Major effort was directed toward development of rapid reliable methods for analysis of reacted limestones. A solvent system, suitable for dissolving limestone and capable of being made infrared inactive by the dual cell technique was developed. The system--tetrasodium EDTA (ethylenediaminetetraacetic acid) saturated water was found to be the only one of a large number of systems investigated capable of dissolving limestone. The feasibility was studied of using a D2O based solvent system to determine the oxide and hydroxide contents of reacted limestones. The KBr pellet technique was studied in considerable detail. Ion exchange resin techniques were also studied in conjunction with the KBr method. Infrared spectroscopic techniques were also applied to studies of gas-solid interactions between the sulfur dioxide content of a simulated flue gas and various limestone absorbents and to an investigation of the deadburning phenomenon. The latter has revealed the strong possibility of chemical reactions with silicate impurities during high temperature calcination. Electron microprobe data has revealed that at lower calcination temperature, all of the silicates are present in discrete phases in the limestone. Studies were also performed to confirm the hydration of MgO in calcined, slaked dolomitic materials. (Author)