Low energy 4-cell electrochemical system with carbon dioxide gas
First Claim
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1. An integrated system comprising:
- an electrochemical system comprisinga first cell containing a cathode electrolyte, the cathode electrolyte contacting a cathode and comprising a hydroxide,a second cell containing an anode electrolyte, the anode electrolyte contacting an anode, whereinthe cathode is configured to produced hydroxide ions and hydrogen gas and the anode is configured to absorb hydrogen gas and produce protons without producing a gas on application of a voltage across the anode and cathode,a third cell separated from the cathode electrolyte by an ion exchange membrane and connected to a source of concentrated salt solution and configured to receive the concentrated salt solution and produce a depleted salt solution,a fourth cell separated from the second and third cells by ion exchange membranes and configured to produce a concentrated acid solution;
a system configured for absorbing a gas in the cathode electrolyte operably connected to the electrochemical system wherein the gas comprises waste gases of a cement production plant or a power generating plant; and
a material dissolution system operably connected to the electrochemical system and configured to utilize the acid and/or hydroxide in the cathode electrolyte to dissolve a calcium and/or magnesium rich material and produce a divalent cation solution.
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Abstract
A low-voltage, low-energy electrochemical system and method of producing hydroxide ions and/or bicarbonate ions and/or carbonate ions utilizing significantly less than the typical 3V used across the conventional anode and cathode to produce the ions; consequently, carbon dioxide emissions attributable to the present system and method are significantly reduced.
377 Citations
14 Claims
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1. An integrated system comprising:
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an electrochemical system comprising a first cell containing a cathode electrolyte, the cathode electrolyte contacting a cathode and comprising a hydroxide, a second cell containing an anode electrolyte, the anode electrolyte contacting an anode, wherein the cathode is configured to produced hydroxide ions and hydrogen gas and the anode is configured to absorb hydrogen gas and produce protons without producing a gas on application of a voltage across the anode and cathode, a third cell separated from the cathode electrolyte by an ion exchange membrane and connected to a source of concentrated salt solution and configured to receive the concentrated salt solution and produce a depleted salt solution, a fourth cell separated from the second and third cells by ion exchange membranes and configured to produce a concentrated acid solution; a system configured for absorbing a gas in the cathode electrolyte operably connected to the electrochemical system wherein the gas comprises waste gases of a cement production plant or a power generating plant; and a material dissolution system operably connected to the electrochemical system and configured to utilize the acid and/or hydroxide in the cathode electrolyte to dissolve a calcium and/or magnesium rich material and produce a divalent cation solution. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising:
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receiving a concentrated salt solution and producing a depleted salt solution in a third cell of an electrochemical system by applying a voltage across a cathode contained in a first cell and an anode contained in a second cell of the electrochemical system, receiving a weak acid solution and producing a concentrated acid solution in a fourth cell of the electrochemical system wherein the third cell is separated from the first cell containing a cathode electrolyte, the cathode electrolyte comprising a hydroxide and contacting the cathode, and the fourth cell is separated from the second cell containing an anode electrolyte, the anode electrolyte contacting the anode, producing hydroxide ions and hydrogen gas at the cathode, and absorbing hydrogen gas and producing protons at the anode without producing a gas at the anode; absorbing a gas in the cathode electrolyte wherein the gas comprises waste gases of a cement production plant or a power generating plant; and dissolving a solid material comprising a calcium and/or magnesium rich material with the acid to produce a divalent cation solution. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification