Abstract
A pilot-plant-scale study of combined sulfur dioxide/nitrogen oxides (SO2/NOx) removal has been performed by the Dravo Lime Company at the Cincinnati Gas and Electric Company's Miami Fort Station in North Bend, Ohio. This study used Dravo's patented Thiosorbic® lime process along with Argonne National Laboratory's (ANL's) patented process for combined SO2/NOx removal using the chelate ferrous·ethylenediaminetetraacetate (Fe·EDTA). For approximately nine months, scrubbing tests were carried out, and waste samples were collected. Waste testing at ANL involved two types of long-term chemical stability experiments. In one test, the gas-phase composition above several different samples was studied by mass spectrometry over 22 months. Unexpectedly, production of carbon dioxide and hydrogen sulfide was observed in some of the samples. The other experiment involved solid-phase leaching. Samples were stored for up to 14 months before leaching. Each leachate was tested for total Kjeldahl nitrogen and for the nitrogen-containing ions nitrite, nitrate, and ammonium. Significant amounts of ammonium ions were found in two of the samples. Total leachable nitrogen was found to stabilize after about the first 7 months of storage.
Similar content being viewed by others
References
Benson, L. B., Lee, Y. J. and College, J. W.: 1993, U.S. Patent No. 5,200,160.
Dravo Lime Company: 1992, Enhanced NO x Removal in Wet Scrubbers Using Metal Chelates, prepared for the U.S. Department of Energy, Pittsburgh Energy Technology Center, Pittsburgh, Penn.
Harkness, J. B. L., Doctor, R. D. and Wingender, R. J.: 1986, U.S. Patent No. 4,612,175.
Huasheng, L. and Wenchi, F.: 1988, Ind. Eng. Chem. Res. 27, 770.
Littlejohn, D. and Chang, S.-G.: 1991, Energy and Fuels 5, 249.
Lockhart, H. B. Jr. and Blakeley, R. V.: 1975, Environ. Sci. Technol. 9, 1035.
Nakasaki, K., Sasaki, M., Shoda, M. and Kubota, H.: 1985, Appl. Environ. Microbiol. 49, 37.
Sada, E., Kumazawa, H. and Hikosaka, H.: 1986, Ind. Eng. Chem. Fundam. 25, 386.
Varner, J. E., Bulen, W. A., Vanecko, S. and Burrell, R. C.: 1953, Anal. Chem. 25,, 1528.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Mendelsohn, M.H., Livengood, C.D. Stability Studies of Waste Produced in Pilot-Plant Testing using Ferrous-EDTA and Magnesium-Enhanced Lime for Combined Sulfur-Dioxide/Nitrogen Oxides Removal. Water, Air, & Soil Pollution 101, 105–121 (1998). https://doi.org/10.1023/A:1004958020312
Issue Date:
DOI: https://doi.org/10.1023/A:1004958020312