Apparatus for ferric ion treatment for removal of ash-forming mi

Details Apparatus for ferric ion treatment for removal of ash-forming mi Apparatus for ferric ion treatment for removal of ash-forming mi

1986-01-08

1987-04-07

Williams, Howard S.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

44 1B, 44 1SR, 204131, 204255, C10L 902, C25B 300, C25B 1508

Patent

active

046558969

ABSTRACT:
By Ferric Ion Treatment of crushed and/or pulverized coal, the ash content of a coal can be significantly and efficiently reduced. This treatment of coal, preferably in an acidic medium, creates an increase in osmotic pressure inside the pores and crevices of the coal matrix until they open up, allowing the ash-forming mineral matter to be released from the coal. Also, the ferric ions preferentially attack the sessile bonds of the coal molecule and help open up the pores. The liberated mineral matter is then separated from the coal to obtain a clean coal. A flow-through reactor, utilizing working, reference and counter electrodes, and a loosely-packed coal bed through which the electrolyte flows, is particularly effective in facilitating the Ferric Ion Treatment.

REFERENCES:
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patent: 4517067 (1985-05-01), Byerley et al.
Paul, "Pretreatment of Coal . . . ", Brookhaven National Laboratory Informal Report 35429, Oct. 1984.
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Okada et al., "On the Electrolysis of Coal Slurries"; J. Electrochem. Soc., Oct. 1981, pp. 2097-2102.
Farooque et al., I, "Anodic Coal Reaction . . . ", Nature, vol. 280, Aug. 23, 1979, pp. 666-668.
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Coughlin et al., "Hydrogen Production . . . ", Nature, vol. 279, May 1979, pp. 301-303.

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