Method of recovering metal compounds from solid oxide fuel cell scrap
AssigneeBloom Energy Corporation
InventorsLunzhi LIAO, Christopher Jeffrey HARTLEY, Andrew SARMIENTO
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Abstract
A method of recovering metal compounds from solid oxide fuel cell scrap includes processing the solid oxide fuel cell scrap to form a powder, digesting the processed scrap, extracting lanthanum oxide and cerium oxide from a solution containing the digested processed scrap, extracting a zirconium compound from the solution after extracting the lanthanum oxide and cerium oxide, and extracting scandium compound from the solution extracting the zirconium compound from the solution.
Claims20
A method of recovering metal compounds from solid oxide fuel cell scrap, the method comprising:
- processing the solid oxide fuel cell scrap to form a powder of processed scrap;
- digesting the processed scrap;
- extracting lanthanum oxide and cerium oxide from a solution containing the digested processed scrap;
- extracting a zirconium compound from the solution after extracting the lanthanum oxide and cerium oxide;
- and
- extracting scandium compound from the solution extracting the zirconium compound from the solution.
A method of recovering lanthanum oxide and cerium oxide from solid oxide fuel cell scrap, the method comprising:
- processing the scrap, such that the scrap has an average particle size of less than about 100 μm;
- digesting the processed scrap;
- mixing the digested scrap with water to form a solution;
- adding a salt to the solution to form a precipitate comprising Ce and La;
- filtering the solution to separate the precipitate from a filtrate;
- and
- drying the precipitate to form a cake comprising La2O3 and CeO2.
Dependencies are inferred from the claim text.