Method for the electrochemical production of a gas product containing co

Patent metadata

Field	Value
Publication number	US-2021010142-A1
Application number	US-201916964763-A
Country	US
Kind code	A1
Filing date	Jan 18, 2019
Priority date	Feb 15, 2018
Publication date	Jan 14, 2021
Grant date	—

Abstract

A device for the electrochemical production of a product containing CO, and a method for the electrochemical production of a product containing CO, in which a return of a material stream containing the educt and CO is carried out after the electrochemical production.

First claim

1 . A facility for electrochemical production of a product containing CO, comprising:
an electrolysis cell comprising an anode and a cathode; a combined feed device, which is connected to the electrolysis cell and supplies the electrolysis cell with a combined flow of material comprising a first educt flow and a flow of material to be returned comprising CO, which is embodied to supply the electrolysis cell with the combined flow of material comprising the first educt flow and the flow of material to be returned comprising CO; a first return device, which is connected to the feed device and feeds the first educt flow to the combined feed device, which is embodied to feed the first educt flow to the feed device; a first discharge device, which is connected to the electrolysis cell and discharges from the electrolysis cell a first product flow comprising CO, which is embodied to discharge from the electrolysis cell the first product flow comprising CO and to feed the first product flow to a separation device; the separation device, which is connected to the first discharge device and separates the flow of material comprising CO to be returned from the first product flow comprising CO, which is embodied to separate the flow of material comprising CO to be returned from the first product flow comprising CO; a return device, which is connected to the separation device and is connected to the combined feed device and feeds the flow of material comprising CO to be returned to the combined feed device, which is embodied to feed the flow of material comprising CO to be returned to the combined feed device; and at least one cleaning device, which removes carbonyls and/or oils from the first product flow comprising CO, the flow of material comprising CO to be returned and/or the combined flow of material comprising the first educt flow and the flow of material comprising CO to be returned and which is embodied to remove carbonyls and/or oils from the first product flow comprising CO, the flow of material comprising CO to be returned and/or the combined flow of material comprising the first educt flow and the flow of material comprising CO to be returned and which is arranged accordingly in the first discharge device, in the return device and/or in the combined feed device.

2 . The facility as claimed in claim 1 ,
wherein the at least one cleaning device is chosen from a washer to dissolve and/or break down carbonyls and/or oils in a suitable solvent, which is embodied to dissolve and/or to break down carbonyls and/or oils in a suitable solvent; a guard bed comprising a substance for adsorption and/or absorption of carbonyls and/or oils, which is embodied to adsorb carbonyls and/or oils at the substance for adsorption and/or absorption pf carbonyls and/or oils and/or to absorb carbonyls and/or oils into the substance for adsorption and/or adsorption of carbonyls and/or oils; a discharge device; an irradiation device with an irradiation wavelength of below 450 nm, preferably below 400 nn; and/or a first heating device to break down carbonyls and/or oils, which is embodied to break down the carbonyls and/or oils thermally.

3 . The facility as claimed in claim 2 ,
wherein the at least one cleaning device comprises a heating device to break down carbonyls and/or oils, wherein a moistener is connected in the direction of flow after the at least one cleaning device, in which water is fed to the first product flow comprising CO, to the flow material to be returned comprising CO and/or to the combined flow of material comprising the first educt flow and the flow material to be returned comprising CO and which is embodied to feed water to the first product flow comprising CO, to the flow of material to be returned comprising CO and/or to the combined flow of material comprising the first educt flow and the flow of material to be returned comprising CO.

4 . The facility as claimed in claim 1 , further comprising:
at least one compressor, which is arranged in the direction of flow in the first product flow comprising CO, in the flow of material to be returned comprising CO and/or in the combined flow of material comprising the first educt flow and the flow of material to be returned comprising CO before the at least one cleaning device in the first discharge device, in the return device and/or in the combined feed device.

5 . The facility as claimed in claim 4 ,
wherein the at least one compressor is embodied in such a way that the first product flow comprising CO, the flow of material to be returned comprising CO and/or the combined flow of material comprising the first educt flow and the flow of material to be returned comprising CO does not come into contact with oil used in the compressor.

6 . The facility as claimed in claim 1 ,
wherein the first discharge device, the return device and/or in the combined feed device in the direction of flow behind the at least one cleaning device, at least in parts that come into contact with the first product flow comprising CO, the flow of material to be returned comprising CO and/or the combined flow of material comprising the first educt flow and the flow of material to be returned comprising CO consists of a material or is coated with a material that is selected from iron and nickel-free metallic materials, plastic, steels containing Cr and/or mixtures thereof.

7 . The facility as claimed in claim 1 ,
wherein the separation device comprises a separation membrane, an adsorbent, an absorbent, a condenser, a distillation unit and/or a second heating device.

8 . The facility as claimed in claim 1 ,
wherein the first discharge device, the separation device, the return device, the at least one cleaning device and/or in the combined feed device and/or if necessary at least one compressor, at least in parts that come into contact with the first product flow comprising CO, the flow of material to be returned comprising CO and/or the combined flow of material comprising the first educt flow and the flow of material to be returned comprising CO consists of a material or is coated with a material that is selected from iron and nickel-free metallic materials, plastic, steels containing Cr and/or mixtures thereof.

9 . The facility as claimed in claim 1 , further comprising:
a deoxo unit, which is located in the first discharge device and which is embodied to remove oxygen from the first product flow comprising CO.

10 . A method for electrochemical production of a product containing CO, comprising:
introducing a first educt flow into a first feed device of a facility as claimed in claim 1 ; feeding the first educt flow to the electrolysis cell; converting the first educt flow to a first product flow comprising CO; discharging the first product flow comprising CO from the electrolysis cell; separating a flow of material to be returned comprising CO from the product flow comprising CO in the separation device; and returning the flow of material to be returned comprising CO to the combined feed device, wherein carbonyls and/or oils are removed by the at least one cleaning device from the first product flow comprising CO, the flow of material to be returned comprising CO and/or the combined flow of material comprising the first educt flow and the flow of material to be returned comprising CO.

11 . The method as claimed in claim 10 ,
wherein the first educt flow is a gas flow that comprises CO 2 .

12 . The method as claimed in claim 10 ,
wherein the first educt flow is a gas flow that is introduced into the first feed device under increased pressure, wherein preferably the at least one cleaning unit is provided in the combined feed device.

Assignees

• Siemens Ag
• Linde Gmbh

Inventors

• Delhomme-Neudecker Clara
• Hanebuth Marc
• Peschel Andreas
• Schmid Günter
• Schödel Nicole
• Taroata Dan

Classifications

• B01D53/1487

  Removing organic compounds · CPC title

• C25B1/23

  Carbon monoxide or syngas · CPC title

• B01D2256/22

  Carbon dioxide · CPC title

• B01D2256/20

  Carbon monoxide · CPC title

• B01D53/75

  Multi-step processes · CPC title