Fly ash utilization in flue gas desulfurization

Compositions – Co – s – negative element – or acid – bindant containing – Alkali-metal or alkali-metal compound containing

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106DIG1, 264DIG49, C09K 300

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active

048698466

ABSTRACT:
A carboxylic acid which has a pK.sub.a within the range of 2 to 7 and the ability to increase the effective alkalinity of fly ash for flue gas desulfurization. Carboxylic acid may be combined with adjuvants. Generally carboxylic acids with dispersant properties are preferred. Adjuvants which enhance the dispersant qualities of carboxylic acid are desirable.

REFERENCES:
patent: 2358157 (1944-09-01), Gardner
patent: 2668150 (1954-02-01), Lavisi
patent: 4419138 (1983-12-01), Popovics
Hawley, G. G., The Condensed Chemical Dictionary, van Nostrand Reinhold Co., N.Y., Ninth Edition, (1977), pp. 392, 446.
Carlton Johnson, "Flyash Removes SO.sub.2 Effectively from Boiler Flue Gases", Power Eng., vol. 83, #6, (1979), pp. 61-63.
Carlton A. Johnson, "Flyash Alkali Technology--Low Cost Flue Gas Desulfurization", 3rd International Coal Utilization Exhibition & Conference, Houston, TX, Nov. 18-20, pp. 568-588.
PEI Associates, Inc., "Flue Gas Desulfurization Inspection and Performance Evaluation Manual", EPA/625/1-85/019, Oct. 1985, pp. 1-23.
Cathy Apple and Mary E. Kelly, "Mechanisms of Dry SO.sub.2 Control Processes, EPA Project Summary", EPA-600/S7-82-026, Jun., 1982.
Harvey M. Ness, Franklin I. Honea, Everett A. Sondreal, and Philip Richmond, "Pilot Plant Scrubbing of SO.sub.2 with Fly Ash Alkali from North Dakota Lignite", Technol . . . Use Lignite 1977, pp. 100-122.
John R. Green and Stanley E. Manahan, "Sulfur Dioxide Sorption by Humic Acid-Fly Ash Mixtures", Fuel, vol. 60, #4, (1981), pp. 330-334.
Harold I. Zeliger, "Powder from Western Coal: Fly Ash as a Reagent for SO.sub.2 Scrubbing", Conference Proceedings, Joint Conference on Sensing of Environmental Pollutants, New Orleans, La., Nov. 6-11, 1977, pp. 159-161.
Encyclopedia of Chemical Technology, vol. 7, pp. 444-447, John Wiley and Sons, (Third Edition).
The Condensed Chemical Dictionary, p. 641, 8th Edition, Van Nostrand Reinhold Company, (1971), "Oil".

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