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Electrolyzer for gaseous carbon dioxide

a carbon dioxide and gaseous technology, applied in the field of electrochemical devices, can solve the problems of limited use of conventional electrochemical reduction systems, inefficient conventional systems, poor stability, etc., and achieve the effect of eliminating or reducing undesired crossover of chemical products, improving the transport rate of chemical species, and reducing the number of undesired chemical product crossovers

Inactive Publication Date: 2020-07-02
THE UNIV OF BRITISH COLUMBIA +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

The patent is about a method of reducing product crossover in an electrochemical device by using a bipolar membrane. This membrane separates the cathode and the anode, allowing for separate collection of reaction products. The bipolar membrane also manages the flux of chemical species, reducing crossover between the two sides. The method includes configuring the membrane, operating the electrochemical cell with the membrane, and facilitating the supply of protons to the cathode to cause water to self-ionize via autodissociation to generate hydroxide ions and protons. The technical effect of this method is a reduction or elimination of product crossover, improving the transport rate of chemical species within the electrochemical device.

Problems solved by technology

Conventional systems may be inefficient, have poor stability, and / or have difficulty in separating reaction products from the electrolytes.
These and other disadvantages may limit the use of conventional electrochemical reduction systems.

Method used

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  • Electrolyzer for gaseous carbon dioxide
  • Electrolyzer for gaseous carbon dioxide
  • Electrolyzer for gaseous carbon dioxide

Examples

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examples

[0108]In a non-limiting example, an embodiment of the electrochemical device 10 was created using a gas diffusion cathode 14. The cathode 14 included a piece of Toray carbon paper (Toray® TGP-H-120). Silver nanoparticles (100 nm diameter, Sigma Aldrich®) were use as the CO2 reduction catalyst 44. Cathode catalyst ink 44 was made by mixing 8 miligrams of silver nanoparticles with 200 microliters of isopropyl alcohol, 200 microliters of deionized water (18.2 MΩ), and 15 microliters of 5% Nafion (sulfonated tetrafluoroethylene based fluoropolymer-copolymer solution), which was sonicated for 10 minutes. The cathode catalyst ink 44 was then painted onto the carbon paper at a typical loading of about 5 miligrams per square centimeter (mg / cm2). The anode 18 included a piece of Toray carbon paper (Toray® TGP-H-120). NiFeOx was used as the anode catalyst 46. NiFeOx was electrodeposited onto the carbon paper.

[0109]The anode 18 and cathode 14 were assembled together with a bipolar membrane 22....

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Abstract

An electrochemical device and method can include techniques involving bipolar membrane electrolysis to transform an input product into an output product. Some embodiments can include a gas-diffusion electrode as a cathode, a bipolar membrane configured to facilitate autodissociation, and an anode that can be configured as a liquid-electrolyte style electrode or a gas-diffusion electrode. In some embodiments the electrochemical device can be configured as a CO2 electrolyzer that is designed to utilize input product including carbon dioxide gas and water to generate output products that can include gaseous carbon monoxide or other reduction products of carbon dioxide and gaseous oxygen or the oxidation products of a depolarizer such as hydrogen, methane, or methanol. Embodiments can be utilized in the production of fuels or feedstocks for fuels and carbon-containing chemicals, in air purification systems, flue gas treatment devices, and other machines and facilities.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This patent application is a continuation application of U.S. patent application Ser. No. 16 / 132,914, filed on Sep. 17, 2018, which is related to and claims the benefit of priority of U.S. Provisional Patent Application Ser. No. 62 / 577,357 filed on Oct. 26, 2017, the entire contents of which is incorporated herein by reference.[0002]The present application also claims priority to International Application No. PCT / CA2018 / 051147, which claims priority to U.S. Provisional Patent Application No. 62 / 558,505 filed on Sep. 14, 2017. The entirety of PCT / CA2018 / 051147, which published as WO 2019 / 051609, is incorporated by reference herein.STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT[0003]This invention was made with government support under Grant No. DE-FG02-07ER15911 awarded by the Department of Energy. The Government has certain rights in the invention.FIELD OF THE INVENTION[0004]Embodiments can relate to an electrochemical d...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C25B9/10C25B9/08C25B1/00C25B1/10C25B3/04C25B13/08C25B9/23C25B3/25C25B9/19
CPCC25B9/08C25B9/10C25B1/10C25B13/08C25B1/00C25B3/04Y02E60/36C25B3/25C25B1/04C25B9/73C25B9/23C25B9/19C25B3/26
Inventor LI, YUGUANG C.YAN, ZHIFEIMALLOUK, THOMAS E.BERLINGUETTE, CURTISSALVATORE, DANIELLE
Owner THE UNIV OF BRITISH COLUMBIA
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