H sub 2 S abatement in geothermal steam during stacking operations

Patent · Tue Oct 02 04:00:00 EDT 1990

OSTI ID:6213545

Bedell, S A; Hammond, C A; Kirby, L H

This patent describes a method of abating hydrogen sulfide in stacked geothermal steam. It comprises: injecting ferric chelating solution into a geothermal steam stacking line vented through a rock muffler directly to the atmosphere, sufficiently upstream from the rock muffler wherein the steam and injected chelating solution having a contact time of 0.2--1.0 seconds, and in an amount effective to abate hydrogen sulfide in the geothermal steam vented therethrough, whereby the hydrogen sulfide therein is substantially converted to elemental sulfur and the ferric chelate is reduced to ferrous chelate; collecting the chelating solution and the sulfur in a basin in the rock muffler; withdrawing the chelating solution from the basin; separating the sulfur from the chelating solution; and oxidizing the chelating solution to regenerate the ferrous chelate to ferric chelate for reuse in the injection step.

• Assignee: Dow Chemical Co., Midland, TX (USA)
• Patent Number(s): US 4960576; A
• Application Number: PPN: US s 7-359896
• OSTI ID: 6213545
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
154000* -- Geothermal Energy-- Waste Management-- (1990-)
CHALCOGENIDES
CHELATES
CHEMICAL REACTIONS
COMPLEXES
DESULFURIZATION
FLUIDS
GEOTHERMAL FLUIDS
GEOTHERMAL POWER PLANTS
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
IRON COMPOUNDS
NATURAL STEAM
POWER PLANTS
REMOVAL
STEAM
STEAM QUALITY
SULFIDES
SULFUR COMPOUNDS
THERMAL POWER PLANTS
TRANSITION ELEMENT COMPOUNDS