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US 12,612,701 B2Granted
Process to convert reduced sulfur species and water into hydrogen and sulfuric acid
AssigneeCalifornia Institute of Technology
InventorCody E. Finke
Life of this patent
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Abstract
A method for producing a cement material comprises steps of: reacting sulfur dioxide and water to form a first acid, the first acid comprising at least one sulfur-containing anion; reacting the first acid and a first cement precursor to form a second cement precursor; wherein the second cement precursor comprises the at least one sulfur-containing anion; and converting the second cement precursor to the cement material.
Claims30
A method for producing a cement material, said method comprising steps of:
- a. reacting sulfur dioxide and water to form a first acid, the first acid comprising at least one sulfur-containing anion;
- b. reacting the first acid and a first cement precursor to form a second cement precursor different from the first cement precursor;
- wherein the second cement precursor comprises the at least one sulfur-containing anion;
- and
- c. converting the second cement precursor to the cement material, the cement material being different from both the first and second cement precursors;
- wherein step (c) comprises forming the cement material and sulfur dioxide.
3 more elements
A method for producing a cement material, said method comprising steps of:
- a. reacting sulfur dioxide and water to form a first acid, the first acid comprising at least one sulfur-containing anion;
- b. reacting the first acid and a first cement precursor to form a second cement precursor;
- wherein the second cement precursor comprises the at least one sulfur-containing anion;
- and
- c. converting the second cement precursor to the cement material;
- wherein:
- step (c) comprises forming the cement material and sulfur dioxide;
- the sulfur-containing anion is sulfate (SO4);
- the first acid is sulfuric acid (H2SO4);
- the step (a) comprises (i) electrochemically oxidizing the sulfur dioxide to the sulfuric acid and (ii) electrochemically forming hydrogen gas via a reduction reaction;
- and
- the sulfur dioxide and the water are reacted at a ratio of 1:2, respectively, during step (a).
9 more elements
Dependencies are inferred from the claim text.