Fuel cell powerplant employing an aqueous solution
First Claim
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1. A method for forming ferric hydrous oxide of a character that retards the deposition of iron based compounds on the walls of a conduit, comprising:
- flowing to a vented chamber an aqueous solution containing iron based compounds which include magnetite, the aqueous solution having an oxygen content which supresses the formation of magnetite and promotes the conversion of a portion of the magnetite to ferric hydrous oxide during boiling of the aqueous solution at atmospheric pressure;
heating the aqueous solution at atmospheric pressure until the aqueous solution boils for a period of time that causes the conversion of at least a portion of said magnetite to ferric hydrous oxide;
cooling a portion of said boiled aqueous solution and disposing said cooled, boiled aqueous solution including said ferric hydrous oxide of a character that retards the deposition of iron based compounds in said conduit.
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Abstract
A ferric hydrous oxide of a character that retards the deposition of iron based compounds on the walls of a conduit is prepared by flowing an aqueous solution containing iron-based compounds including magnetite into a vented chamber, and boiling the solution at atmospheric pressure.
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Citations
9 Claims
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1. A method for forming ferric hydrous oxide of a character that retards the deposition of iron based compounds on the walls of a conduit, comprising:
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flowing to a vented chamber an aqueous solution containing iron based compounds which include magnetite, the aqueous solution having an oxygen content which supresses the formation of magnetite and promotes the conversion of a portion of the magnetite to ferric hydrous oxide during boiling of the aqueous solution at atmospheric pressure; heating the aqueous solution at atmospheric pressure until the aqueous solution boils for a period of time that causes the conversion of at least a portion of said magnetite to ferric hydrous oxide; cooling a portion of said boiled aqueous solution and disposing said cooled, boiled aqueous solution including said ferric hydrous oxide of a character that retards the deposition of iron based compounds in said conduit. - View Dependent Claims (2, 3, 4, 5)
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6. A method for forming in a fuel cell powerplant ferric hydrous oxide of a character that retards the deposition of iron based compounds on the walls of a conduit in the powerplant, the powerplant having a fuel cell stack and a cooling system for the fuel cell stack which employs an aqueous coolant, comprising:
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flowing to a vented chamber an aqueous solution containing iron based compounds which include magnetite, the aqueous solution having an oxygen content which supresses the formation of magnetite and which promotes the conversion of a portion of the magnetite to ferric hydrous oxide during boiling of the aqueous solution at atmospheric pressure; flowing heated coolant from the fuel cell stack to the chamber; transferring heat from the coolant to boil said aqueous solution; cooling a portion of said boiled aqueous solution and flowing said cooled, boiled aqueous solution to the cooling system for the fuel cell stack. - View Dependent Claims (7, 8, 9)
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Specification