Back to results
US 7,993,500 B2Granted
Gas diffusion anode and CO2 cathode electrolyte system
AssigneeCalera Corporation
InventorsRyan J. Gilliam, Valentin Decker, Nigel Antony Knott, Michael Kostowskyj, Bryan Boggs, Kasra Farsad
Life of this patent
Estimating the term…
Abstract
A low-voltage, low-energy electrochemical system and method of removing protons and/or producing a base solution using a gas diffusion anode and a cathode electrolyte comprising dissolved carbon dioxide, while applying 2V or less across the anode and cathode.
Claims21
An electrochemical system comprising:
- a gas diffusion anode contacting an anode electrolyte wherein the anode is configured to produce protons from hydrogen gas;
- a cathode contacting a cathode electrolyte comprising dissolved carbon dioxide and gaseous carbon dioxide, wherein the carbon dioxide is obtained from sources comprising combustion gas of fossil fuelled electrical power generating plant, cement plant, ore processing plant, or combination thereof;
- and
- a gas delivery system configured to deliver hydrogen gas produced at the cathode to the anode;
- wherein the system is configured to not produce a gas at the anode and wherein the system is configured to produce an acid in the anode electrolyte on application of a voltage across the anode and cathode.
2 more elements
An electrochemical method comprising:
- contacting an anode electrolyte with a gas diffusion anode;
- contacting a cathode electrolyte with a cathode, wherein the cathode electrolyte comprises dissolved carbon dioxide and gaseous carbon dioxide;
- dissolving the gaseous carbon dioxide into the cathode electrolyte wherein the carbon dioxide is obtained from sources comprising combustion gas of fossil fuelled electrical power generating plant, cement plant, ore processing plant, or combination thereof;
- separating the anode electrolye from the cathode electrolyte using an ion exchange membrane;
- applying a voltage across the gas diffusion anode and the cathode;
- producing hydrogen gas at the cathode and directing the hydrogen gas to the gas diffusion anode;
- oxidizing the hydrogen gas to protons at the anode without producing a gas at the anode;
- and
- producing an acid in the anode electrolyte.
6 more elements
Dependencies are inferred from the claim text.