Electrochemical production of urea from NOx and carbon dioxide
AssigneeLiquid Light, Inc.
InventorsNarayanappa Sivasankar, Emily Cole, Kyle Teamey, Andrew Bocarsly
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Abstract
Methods and systems for electrochemical production of urea are disclosed. A method may include, but is not limited to, steps (A) to (B). Step (A) may introduce carbon dioxide and NOx to a solution of an electrolyte and a heterocyclic catalyst in an electrochemical cell. The divided electrochemical cell may include an anode in a first cell compartment and a cathode in a second cell compartment. The cathode may reduce the carbon dioxide and the NOx into a first sub-product and a second sub-product, respectively. Step (B) may combine the first sub-product and the second sub-product to produce urea.
Claims15
A method for electrochemical production of urea, comprising:
- (A) introducing carbon dioxide and a nitrogen oxide to a solution of an electrolyte and a heterocyclic catalyst in an electrochemical cell, wherein (i) said electrochemical cell including an anode in a first cell compartment and a cathode in a second cell compartment, (ii) said cathode reducing said carbon dioxide into a first sub-product and reducing said nitrogen oxide into a second sub-product, and (iii) said heterocyclic catalyst includes at least one of adenine, a heterocyclic amine containing sulfur, a heterocyclic amine containing oxygen, an azole, benzimidazole, a bipyridine, furan, an imidazole, an imidazole related species with at least one five-member ring, an indole, methylimidazole, an oxazole, phenanthroline, pterin, pteridine, a pyridine, a pyridine related species with at least one six-member ring, pyrrole, quinoline, or a thiazole;
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- (B) combining said first sub-product and said second sub-product to produce urea.
A method for electrochemical production of urea, comprising:
- (A) introducing carbon dioxide and a nitrogen oxide to a solution of an electrolyte and a heterocyclic catalyst in an electrochemical cell, wherein (i) said electrochemical cell including an anode in a first cell compartment and a cathode in a second cell compartment, (ii) said cathode reducing said carbon dioxide into a first sub-product and reducing said nitrogen oxide into a second sub-product, (iii) said heterocyclic catalyst includes at least one of adenine, a heterocyclic amine containing sulfur, a heterocyclic amine containing oxygen, an azole, benzimidazole, a bipyridine, furan, an imidazole, an imidazole related species with at least one five-member ring, an indole, methylimidazole, an oxazole, phenanthroline, pterin, pteridine, a pyridine, a pyridine related species with at least one six-member ring, pyrrole, quinoline, or a thiazole;
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- (B) combining said first sub-product and said second sub-product to produce urea;
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- (C) varying a yield of urea by adjusting at least one of (a) a material of said cathode, (b) said heterocyclic catalyst, (c) an electrical potential of said cathode, and (d) said electrolyte.
Dependencies are inferred from the claim text.