Power plants – Utilizing natural heat – Geothermal
Patent
1981-01-30
1982-12-14
Thomas, Earl C.
Power plants
Utilizing natural heat
Geothermal
423224, 423226, 423561R, 210759, 210763, F03G 700
Patent
active
043632157
ABSTRACT:
A process for the conversion of aqueous hydrogen sulfide, bisulfide ion, and sulfide ion in condensed geothermal steam to form less volatile and environmentally less objectionable sulfur compounds comprises reacting such steam components with hydrogen peroxide catalyzed by various iron or nickel compounds. The hydrogen peroxide and catalyst are added to steam condensate after it has been used and before it is returned to a cooling tower where it may be added to other cooling water in a geothermal steam power system. The conversion process prevents the buildup of harmful, contaminating sulfur compounds on system components in the liquid stream and also prevents the release of certain otherwise voltatile components to the atmosphere.
REFERENCES:
patent: 2972512 (1961-02-01), Guinot et al.
patent: 3097926 (1963-07-01), Nicklin et al.
patent: 3226320 (1965-12-01), Mevly
patent: 4009251 (1977-02-01), Mevly
patent: 4218431 (1980-08-01), Spevack
patent: 4224151 (1980-09-01), Jost
Castranas, "The Use of Hydrogen Peroxide to Abate Hydrogen Sulfide in Geothermal Operations", Paper 7882, presented at the 1979 SPE of AIME International Symposium on Oilfield & Geothermal Chemistry, Houston, Texas, 1976.
"The Geothermal Resource", Petroleum Information Corporation, 1979, pp. 46.varies.49 & 100-103.
Allen et al, "Abatement of Hydrogen Sulfide Emissions from the Geysers Geothermal Power Plant", Second United Nations Symposium on the Development & Utilization of Geothermal Resources, 1975, pp. 313-315.
Pacific Gas and Electric Company
Thomas Earl C.
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