Ammonia generator using plasma

Patent metadata

Field	Value
Publication number	US-2024254635-A1
Application number	US-202218561021-A
Country	US
Kind code	A1
Filing date	Jun 23, 2022
Priority date	Jun 23, 2021
Publication date	Aug 1, 2024
Grant date	—

Abstract

An ammonia generator using plasma according to an embodiment of the present invention includes a plasma reactor that generates a plasma discharge using nitrogen (N 2 ) as a discharge gas, generates hydrogen (H 2 ) and oxygen (O 2 ) from water (H 2 O) using energy of the plasma, generates nitrogen monoxide (NO) from the oxygen (O 2 ) and the nitrogen (N 2 ), and supplies the hydrogen (H 2 ) and the nitrogen monoxide (NO), a first reactor that generates ammonia (NH 3 ) by first action on the nitrogen (N 2 ), the nitrogen monoxide (NO), and the hydrogen (H 2 ) supplied from the plasma reactor, and a second reactor that additionally generates the ammonia (NH 3 ) by second action on a nitrate solution (NO 3 − ) generated in the plasma reactor.

First claim

1 . An ammonia generator using plasma, comprising:
a plasma reactor that generates a plasma discharge using nitrogen (N 2 ) as a discharge gas, generates hydrogen (H 2 ) and oxygen (O 2 ) from water (H 2 O) using energy of the plasma, generates nitrogen monoxide (NO) from the oxygen (O 2 ) and the nitrogen (N 2 ), and supplies the hydrogen (H 2 ) and the nitrogen monoxide (NO); a first reactor that generates ammonia (NH 3 ) by first action on the nitrogen (N 2 ), the nitrogen monoxide (NO), and the hydrogen (H 2 ) supplied from the plasma reactor; and a second reactor that additionally generates the ammonia (NH 3 ) by second action on a nitrate solution (NO 3 − ) generated in the plasma reactor.

2 . The ammonia generator using plasma of claim 1 , wherein:
the first reactor is formed as a catalytic reactor that generates ammonia by catalyzing the nitrogen (N 2 ), the nitrogen monoxide (NO), and the hydrogen (H 2 ).

3 . The ammonia generator using plasma of claim 2 , wherein:
the second reactor is formed as an electrochemical cell that additionally directly generates the ammonia (NH 3 ) by electrochemical action on a nitrate solution (NO 3 − ).

4 . The ammonia generator using plasma of claim 2 , wherein:
the catalytic reactor is connected to an additional hydrogen line to generate the ammonia (NH 3 ), including additionally introduced hydrogen (H 2 ).

5 . The ammonia generator using plasma of claim 2 , wherein:
the plasma reactor and the catalytic reactor are connected to a heat recovery line to heat water (H 2 O) with heat recovered at each discharge side.

6 . The ammonia generator using plasma of claim 1 , wherein:
the plasma reactor is connected to an air separator that separates nitrogen from air and supplies the nitrogen.

7 . The ammonia generator using plasma of claim 1 , wherein:
the second reactor is formed as an adsorption catalytic reactor that additionally directly generates the ammonia (NH 3 ) and the nitrogen (N 2 ) by adsorption catalytic reduction action on the nitrate solution (NO 3 − ) and the input hydrogen (H 2 ).

8 . An ammonia generator using plasma, comprising:
a plasma reactor that generates a plasma discharge using air as a discharge gas and generates and supplies nitrogen (N 2 ), nitrogen monoxide (NO), and nitrogen dioxide (NO 2 ) from the air using energy of the plasma; a first reactor that generates dinitrogen pentoxide (N 2 O 5 ) with additional oxidation by supplying ozone (O 3 ) generated from the air to the nitrogen monoxide (NO) and the nitrogen dioxide (NO 2 ) supplied from the plasma reactor; and a second reactor that acts on the nitrogen (N 2 ) and the dinitrogen pentoxide (N 2 O 5 ) generated by the first reactor, and acts on a nitrate solution (NO 3 − ) generated by supplying water (H 2 O) to the nitrogen (N 2 ) and the dinitrogen pentoxide (N 2 O 5 ) to generate ammonia (NH 3 ) and the nitrogen (N 2 ).

9 . The ammonia generator using plasma of claim 8 , wherein:
the first reactor is formed as an ozone generator.

10 . The ammonia generator using plasma of claim 8 , wherein:
the second reactor is formed as an electrochemical cell that generates the ammonia (NH 3 ) by electrochemical action on the nitrogen (N 2 ), the dinitrogen pentoxide (N 2 O 5 ), and the nitrate solution (NO 3 − ).

11 . The ammonia generator using plasma of claim 8 , wherein:
the plasma reactor is connected to a heat recovery line to heat the air with heat recovered at each discharge side.

12 . An ammonia generator using plasma, comprising:
a plasma reactor that generates a plasma discharge using air as a discharge gas and generates and supplies nitrogen (N 2 ), nitrogen monoxide (NO), nitrogen dioxide (NO 2 ), and oxygen (O 2 ) from the air using energy of the plasma; a first reactor that removes the oxygen (O 2 ) supplied from the plasma reactor; and a second reactor that generates ammonia (NH 3 ) and the nitrogen (N 2 ) by acting on the nitrogen (N 2 ), the nitrogen monoxide (NO), and the nitrogen dioxide (NO 2 ) passing through the first reactor.

13 . The ammonia generator using plasma of claim 12 , wherein:
the first reactor is formed as an oxygen separator that separates oxygen from the generated nitrogen (N 2 ), nitrogen monoxide (NO), nitrogen dioxide (NO 2 ), and oxygen (O 2 ).

14 . The ammonia generator using plasma of claim 12 , wherein:
the second reactor is formed as an electrochemical cell that generates the ammonia (NH 3 ) and the nitrogen (N 2 ) by electrochemical action on the nitrogen (N 2 ), the nitrogen monoxide (NO), and the nitrogen dioxide (NO 2 ).

15 . The ammonia generator using plasma of claim 12 , wherein:
the second reactor is formed as an adsorption catalytic reactor that generates the ammonia (NH 3 ) and the nitrogen (N 2 ) by adsorption catalytic reduction action on the nitrogen (N 2 ), the nitrogen monoxide (NO), and the nitrogen dioxide (NO 2 ).

Assignees

• Korea Inst Mach & Materials

Inventors

• Kim You-Na
• Lee Dae-Hoon
• Song Younghoon
• Kim Kwan-Tae
• Kang Hong Jae
• Song Hohyun
• Lee Heesoo

Classifications

• C01B21/203

  Preparation of nitrogen oxides using a plasma or an electric discharge · CPC title

• C25B15/08

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

• C25B1/27 Primary

  Ammonia · CPC title

• C01B21/48

  Methods for the preparation of nitrates in general (particular individual nitrates, see the relevant groups of subclasses C01B - C01G, according to the cation) · CPC title

• Y02E60/36

  Hydrogen production from non-carbon containing sources, e.g. by water electrolysis · CPC title