Ammonia production method

Patent metadata

Field	Value
Publication number	US-10597301-B2
Application number	US-201616080673-A
Country	US
Kind code	B2
Filing date	Mar 3, 2016
Priority date	Mar 3, 2016
Publication date	Mar 24, 2020
Grant date	Mar 24, 2020

Abstract

A high-concentration ammonia production method includes: synthesizing ammonia through electrolysis using water and nitrogen as raw materials; subjecting a resultant generation gas to treatment using an ammonia separation membrane or an ammonia PSA to separate the generation gas into high-concentration ammonia and a residual gas; recycling the residual gas as a nitrogen gas raw material of an ammonia synthesis reactor, and liquefying the high-concentration ammonia recovered through the ammonia separation membrane or the ammonia PSA; and subjecting an unliquefied gas separated from liquefied ammonia to the treatment using the ammonia separation membrane or the ammonia PSA again. According to the present disclosure, ammonia is synthesized by adopting an electrolysis method in which the synthesized ammonia substantially does not contain hydrogen, in combination with ammonia separation and recovery treatment using membrane separation or PSA. With this, high-concentration ammonia can be synthesized and recovered with high efficiency through an entire process.

First claim

The invention claimed is:

1. A high-concentration ammonia production method, comprising:
subjecting a resultant generation gas to treatment using an ammonia separation membrane or an ammonia PSA to separate the generation gas into high-concentration ammonia and a residual gas;
recycling the residual gas as a nitrogen gas raw material of an ammonia synthesis reactor, and liquefying the high-concentration ammonia recovered through the ammonia separation membrane or the ammonia PSA; and
subjecting an unliquefied gas separated from liquefied ammonia to the treatment using the ammonia separation membrane or the ammonia PSA again.

2. The high-concentration ammonia production method according to claim 1 , further comprising:
discharging, as a purge gas, part of the residual gas to be recycled to an outside of a system to suppress condensation of argon; and
mixing at least part of the purge gas to be discharged in the high-concentration ammonia recovered through the ammonia separation membrane or the ammonia PSA.

3. A power generation method, comprising:
combusting high-concentration ammonia obtained by the method of claim 1 ; and
driving a gas turbine by using a resultant gas as a working medium to generate power.

4. A high-concentration ammonia use method, comprising introducing high-concentration ammonia obtained by the method of claim 1 as a fuel for an ammonia fuel cell.

5. A power generation method, comprising:
combusting high-concentration ammonia obtained by the method of claim 2 ; and
driving a gas turbine by using a resultant gas as a working medium to generate power.

6. A high-concentration ammonia use method, comprising introducing high-concentration ammonia obtained by the method of claim 2 as a fuel for an ammonia fuel cell.

Assignees

• Jgc Corp

Inventors

• Kawasaki Tsutomu
• Watanabe Yoshiyuki

Classifications

• F05D2210/12

  gaseous, i.e. compressible · CPC title

• B01D53/047 Primary

  Pressure swing adsorption · CPC title

• C01C1/04

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

• B01D2257/406

  Ammonia · CPC title

• F02C3/04

  having a turbine driving a compressor (power transmission arrangements F02C7/36; control of working fluid flow F02C9/16) · CPC title