Record Display for the EPA National Library Catalog


Main Title Comparative SO2 reactivity of CaCO3 and Ca(OH)2 /
Author Gullett, Brian Kent, ; Bruce, K. R. ; Beach, L. O.
Other Authors
Author Title of a Work
Gullett, B. K.
Beach, L. O.
CORP Author Acurex Corp., Research Triangle Park, NC.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
Publisher [U.S. Environmental Protection Agency, Office of Research and Development, Air and Energy Engineering Research Laboratory],
Year Published 1989
Report Number EPA/600/J-89/023; EPA-68-02-4701; EPA/600/J-89/002
Stock Number PB89-197776
Subjects Chemical kinetics ; High temperatures ; Air--Pollution
Additional Subjects Air pollution control ; Sulfur dioxide ; Industrial wastes ; Calcium oxides ; Sorbents ; Calcium sulfates ; Particle size ; Performance evaluation ; Experimental design ; Pilot plants ; Reprints ; Limestone injection ; Hydrated lime
Library Call Number Additional Info Location Last
NTIS  PB89-197776 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 7 pages ; 28 cm
In an effort to develop a low-cost retrofit technology for control of sulfur dioxide (SO2) emissions from coal-fired utility plants, boiler injection of dry calcium-based sorbents to form calcium sulfate (CaSo4) has been widely studied. The effects of such parameters as injection temperature, sorbent surface area, and SO2 concentration on the reaction between the active species, calcium oxide (CaO), and SO2 are well documented. One such parameter of particular interest is the chemical parentage of the active sorbent. In pilot-scale studies, CaO derived from hydrated lime, Ca(OH)2, has been found to be more reactive than that from the respective limestone, CaCO3. The paper gives results of a comparison of experimental data on sulfation rates of CaO particles derived from CaCO3 with those derived from Ca(OH)2 using a product layer diffusion control model differing only in the shape of the CaO grain. Both the model and the experimental data indicate slightly higher reactivity for the Ca(OH)2-derived oxide due to the observed difference in grain shape. The effect is proposed as a contributor to the greater performance of Ca(OH)2 in pilot scale SO2 removal studies.
Reprint of an article appearing in AICHE Journal, 35:1, pp.37-41, January 1989." Includes bibliographical references. Journal article. Prepared by Acurex Corp. for the Environmental Protection Agency, Office of Research and Development, Air and Energy Engineering Research Laboratory. Microfiche.