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Reduction of carbon dioxide to carboxylic acids, glycols, and carboxylates

  • US 8,592,633 B2
  • Filed: 07/05/2012
  • Issued: 11/26/2013
  • Est. Priority Date: 07/29/2010
  • Status: Active Grant
First Claim
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1. A method for electrochemical conversion of carbon dioxide, comprising:

  • (A) introducing a liquid to a first compartment of an electrochemical cell, the first compartment including an anode;

    (B) introducing carbon dioxide to a second compartment of the electrochemical cell, the second compartment including a solution of an electrolyte, a cathode, and a homogenous heterocyclic amine catalyst, wherein each bond of the homogenous heterocyclic amine catalyst is selected from the group consisting of;

    a carbon-carbon bond, a carbon-hydrogen bond, a carbon-nitrogen bond, a carbon-oxygen bond, a carbon-sulfur bond, a nitrogen-hydrogen bond, a nitrogen-nitrogen bond, a nitrogen-oxygen bond, and an oxygen-hydrogen bond;

    (C) applying an electrical potential between the anode and the cathode sufficient for the cathode to reduce the carbon dioxide to at least a carboxylate;

    (D) acidifying the carboxylate to convert the carboxylate into a carboxylic acid;

    (E) extracting the carboxylic acid; and

    (F) contacting the carboxylic acid with hydrogen to form a reaction product.

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