公开(公告)号：US20180127886A1

公开(公告)日：2018-05-10

申请号：US15804569

申请日：2017-11-06

Applicant: Korea Institute of Energy Research

Inventor： Ki Tae PARK ,  Soon Kwan JEONG ,  Seong Pil KANG ,  Hak Joo KIM ,  Min Hye YOUN

IPC: C25B3/04 ,  C07C45/41 ,  C07C53/02 ,  C01B32/60 ,  C01B32/50 ,  C25B1/04 ,  B01D19/00

CPC classification number: C25B3/04 ,  B01D19/0036 ,  B01D19/0068 ,  B01D19/0084 ,  C01B32/50 ,  C01B32/60 ,  C07C45/41 ,  C07C53/02 ,  C25B1/04 ,  C25B9/10 ,  C25B15/02 ,  Y02E60/366

Abstract: The present invention relates to an apparatus and method of preparing carbonate and/or formate from carbon dioxide.The apparatus of preparing carbonate and/or formate from carbon dioxide (CO2), comprising: an electrolysis reactor comprising (i) an anode which contains an aqueous solution of a Group I metal salt as an electrolytic solution, (ii) an ion-exchange membrane through which metal cations derived from the Group I metal salt and water flow from an anode to a cathode, (iii) a cathode, and (iv) a gas diffusion layer which supplies a carbon dioxide-containing gas to the cathode; a power supply unit of applying a voltage between the anode and the cathode; a first gas-liquid separator of recovering the electrolytic solution from the products formed in the anode; a second gas-liquid separator of recovering carbonate and/or formate from the products formed in the cathode; a pH meter of measuring the pH of the electrolytic solution recovered from the first gas-liquid separator; a first reactant supply unit of supplying (a) the electrolytic solution recovered from the first gas-liquid separator and (b) the aqueous solution of the Group I metal salt with which the recovered electrolytic solution is replenished according to the pH of the electrolytic solution, to the anode; and a second reactant supply unit of supplying carbon dioxide or a mixer comprising carbon dioxide and water vapor to the cathode; wherein, when a voltage is applied between the anode and the cathode, in the anode, water undergoes electrolysis to generate hydrogen ions, oxygen, and electrons, and metal cations in the Group I metal salt are substituted with the hydrogen ions, while the generated metal cations move to the cathode through the ion-exchange membrane and the electrons move to the cathode through an external electric line; and in the cathode, carbon dioxide, water, metal cations, and electrons are reacted and produce carbonate and/or formate.

公开(公告)号：US20180202056A1

公开(公告)日：2018-07-19

申请号：US15744327

申请日：2016-07-14

Applicant: KOREA INSTITUTE OF ENERGY RESEARCH

Inventor： Ki Tae PARK ,  Soon Kwan JEONG ,  Hak Joo KIM ,  Seong Pil KANG ,  Min Hye YOUN

IPC: C25B3/04 ,  C25B15/02 ,  C07C53/06 ,  C07C53/10 ,  C07C51/15 ,  B01D53/32 ,  B01D53/96

CPC classification number: C25B3/04 ,  B01D3/06 ,  B01D53/1487 ,  B01D53/326 ,  B01D53/965 ,  C01B32/40 ,  C01B32/50 ,  C07C51/15 ,  C07C53/06 ,  C07C53/10 ,  C22C13/00 ,  C25B11/04 ,  C25B15/02

Abstract: The present invention relates to a method and an apparatus of preparing a reduction product of carbon dioxide by electrochemically reducing carbon dioxide.The present invention can prepare, in an energy-efficient manner, a reduction product of high-concentration carbon dioxide with high Faraday efficiency as in a liquid reduction reaction by producing the reduction product of carbon dioxide by supplying water or an electrolytic solution to an anode region; supplying humidified carbon dioxide gas having a second temperature higher than a first temperature to a cathode region within an electrochemical cell having the first temperature so as to supply the carbon dioxide gas which has been humidified to be in a condition where the relative humidity is greater than 100%, while applying a voltage between the anode region and the cathode region so as to generate hydrogen ions (H+) in the anode region; and transporting the hydrogen ions to the cathode region through the electrolyte membrane, thereby electrochemically reducing the carbon dioxide gas.