AMMONIA PRODUCTION METHOD

Title:

AMMONIA PRODUCTION METHOD

Document Type and Number:

WIPO Patent Application WO/2017/149718

Kind Code:

A1

Abstract:

A high-concentration ammonia production method according to the present invention is characterized by: synthesizing ammonia by conducting electrolysis using water and nitrogen as materials; treating the resulting product gas with an ammonia separation membrane or an ammonia PSA to separate the resulting product gas into high-concentration ammonia and a residual gas; further liquefying the high-concentration ammonia gas recovered by the ammonia separation membrane or the ammonia PSA while recycling the residual gas as a nitrogen gas material for an ammonia synthesis reactor; and re-treating the unliquefied gas separated from the liquefied ammonia with the ammonia separation membrane or the ammonia PSA. According to the present invention, ammonia is synthesized by applying electrolysis, by which substantially no hydrogen is contained in the synthesized ammonia, and the electrolysis is combined with an ammonia separation/recovery treatment with membrane separation and PSA. Thereby, it becomes possible to synthesize and recover high-concentration ammonia with a high efficiency throughout the entire process.

Inventors:

KAWASAKI TSUTOMU (JP)
WATANABE YOSHIYUKI (JP)

Application Number:

PCT/JP2016/056556

Publication Date:

September 08, 2017

Filing Date:

March 03, 2016

Export Citation:

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Assignee:

JGC CORP (JP)

International Classes:

C25B1/00; B01D53/047; C01C1/04

Foreign References:

JP2013209684A	2013-10-10
JP2012184132A	2012-09-27
JP2012025985A	2012-02-09
JPH11292531A	1999-10-26

Other References: