Apparatus for synthesizing ammonia

Patent metadata

Field	Value
Publication number	US-10017866-B2
Application number	US-201514871752-A
Country	US
Kind code	B2
Filing date	Sep 30, 2015
Priority date	Nov 17, 2014
Publication date	Jul 10, 2018
Grant date	Jul 10, 2018

Abstract

The present disclosure relates to an ammonia synthesis apparatus, and more particularly, to an electrochemical ammonia synthesis apparatus using an aqueous solution or a molten liquid of an alkali metal as an electrolyte. According to one or more embodiments, when an aqueous solution or a molten liquid of an alkali metal is used as an electrolyte in an ammonia synthesis apparatus, compositions, sizes, and shapes of an electrode and an electrolyte may be easily controlled, and thus a yield of ammonia synthesis may improve.

First claim

The invention claimed is:

1. An ammonia synthesis apparatus comprising:
a container;
a liquid composition contained in the container and comprising an electrolyte;
an anode electrode and a cathode electrode that are spaced apart from each other inside the container and contact the liquid composition;
a power supply configured to supply electrical power between the anode electrode and the cathode electrode;
a liquid circulation unit comprising a flow pathway connected to the container and configure to circulate the liquid composition outside the container through the flow pathway; and
a nitrogen gas supply configured to supply nitrogen gas to the container,
wherein the nitrogen was supply comprises a gas supply inlet formed through a wall of the container below the cathode such that nitrogen gas bubbles are formed and directed to the cathode electrode as nitrogen gas is supplied to the container through the gas supply inlet.

2. The apparatus of claim 1 , wherein the liquid composition further comprises catalyst particles dispersed therein.

3. The apparatus of claim 1 , wherein the gas supply inlet is formed through a bottom wall of the container immediately below the cathode.

4. The apparatus of claim 1 , wherein the flow pathway comprises a liquid inlet formed through a bottom wall of the container.

5. The apparatus of claim 1 , wherein the nitrogen gas supply further comprises a valve configured to prevent the liquid composition from flowing into the gas supply inlet.

6. The apparatus of claim 1 , wherein the gas supply inlet is formed through a bottom wall of the container immediately below the cathode, wherein the liquid composition further comprises catalyst particles dispersed therein, wherein the flow pathway comprises a liquid inlet formed through the bottom wall of the container next to the gas supply inlet.

Assignees

• Korea Inst Energy Res

Inventors

• Yoo Chung-Yul
• Yoon Hyung-Chul
• Yu Ji-Haeng
• Joo Jong Hoon
• Kim Jong-Nam

Classifications

• C25B15/02

  Process control or regulation · CPC title

• C25B1/00

  Electrolytic production of inorganic compounds or non-metals · CPC title

• C25B15/08 Primary

  Supplying or removing reactants or electrolytes; Regeneration of electrolytes · CPC title

• C25B1/27

  Ammonia · CPC title

• C01C1/04

  Preparation of ammonia by synthesis (preparation or purification of gas mixtures for ammonia synthesis C01B3/025) · CPC title