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US 11,965,258 B1Granted
Sulfur dioxide depolarized electrolysis and electrolyzer therefore
AssigneePeregrine Hydrogen Inc.
InventorsStefan Omelchenko, Matthew Shaner, Ian McKay
Life of this patent
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Abstract
A method can include: processing precursors, electrochemically oxidizing sulfur dioxide, processing sulfuric acid and hydrogen, and/or any suitable steps.
Claims20
A method comprising:
- combustion of sulfur with oxygen at a temperature greater than about 140° C. in an oxygen enriched atmosphere to produce sulfur dioxide and heat;
- in an electrolyzer, oxidizing the sulfur dioxide to sulfuric acid and reducing water to hydrogen, wherein a conversion of the sulfur dioxide is at least 50%, wherein an electrolysis temperature is between 70-90° C.;
- separation of the sulfuric acid from unoxidized sulfur dioxide;
- after separating the unoxidized sulfur dioxide from the sulfuric acid, concentrating the sulfuric acid from less than 50% to at least 85% using the heat;
- converting nitrogen to ammonia using the hydrogen and the heat;
- extracting phosphoric acid from phosphate ore using the sulfuric acid;
- and
- forming at least one of monoammonium phosphate, diammonium phosphate, or triammonium phosphate from the ammonia and the phosphoric acid.
5 more elements
A method comprising:
- in an electrolyzer, oxidizing sulfur dioxide to sulfuric acid and reducing water to hydrogen;
- concentrating the sulfuric acid to a concentration greater than about 50% w/w;
- reducing a first species with the hydrogen to form a reduced first species;
- and
- extracting a second species with the sulfuric acid;
- wherein the reduced first species and the second species cooperatively interact, and wherein less than 5% of the sulfuric acid is reduced to the sulfur dioxide.
3 more elements
Dependencies are inferred from the claim text.