Utilization of nitrogen oxides from ambient air

Patent metadata

Field	Value
Publication number	US-11826693-B2
Application number	US-201916973206-A
Country	US
Kind code	B2
Filing date	Jun 18, 2019
Priority date	Jul 17, 2018
Publication date	Nov 28, 2023
Grant date	Nov 28, 2023

Abstract

Utilization of nitrogen oxides contained in the ambient air including a system and a method with which the nitrogen oxides can be utilized for the production of liquid or solid chemicals.

First claim

The invention claimed is:

1. A method for the utilization of nitrogen oxides contained in the ambient air, comprising the adsorption of nitrogen oxides from the ambient air in a stationary adsorbent unit which contains an adsorbent material, removing the adsorbent material loaded with nitrogen oxides from the adsorbent unit, collecting and temporarily storing the adsorbent material loaded with nitrogen oxides at a collecting site, transferring the adsorbent material loaded with nitrogen oxides to a desorption module, desorption of adsorbed nitrogen oxides from the adsorbent material and conversion of the nitrogen oxides into liquid or solid nitrogenous compounds.

2. The method according to claim 1 , wherein the adsorbent material comprises at least one zeolite.

3. The method according to claim 2 , wherein the liquid or solid nitrogenous compounds comprise nitrates.

4. The method according to claim 1 , wherein the liquid or solid nitrogenous compounds comprise nitrates.

5. The method according to claim 4 , wherein the nitrogen oxides in the reaction unit are first converted into nitrous acid and the nitrous acid is then converted into nitrates.

6. A system for the utilization of nitrogen oxides, comprising a stationary adsorbent unit which is adapted for the adsorption of nitrogen oxides from the ambient air, wherein the stationary adsorbent unit has a housing with at least one inflow and outflow opening in the housing wall, a filter module in the interior of the housing which is fluidly connected to the inlet and outlet opening so that an air channel is formed, and an air intake apparatus in order to draw air from the ambient air and to guide it through the filter module, and wherein the adsorbent unit contains an adsorbent material which is adapted to bind nitrogen oxides in an adsorptive manner, and the adsorbent unit is designed such that adsorbent material loaded with nitrogen oxides can be removed without destruction and replaced by unloaded adsorbent material, a collection site for the temporary storage of adsorbent material loaded with nitrogen oxides, a desorption module which is adapted to heat adsorbent material loaded with nitrogen oxides, optionally under reduced pressure, or to treat it with hot water vapor, hot gas or a liquid solvent and thus desorb nitrogen oxides from the adsorbent material, and a reaction unit which is adapted to convert the desorbed nitrogen oxides into liquid or solid nitrogenous compounds.

7. The system according to claim 6 , wherein the adsorbent material comprises at least one zeolite.

8. The system according to claim 7 , wherein the adsorbent unit comprises at least one replacement cartridge with adsorbent material.

9. The system according to claim 7 , wherein the adsorbent unit is designed for a nominal air flow of 10,000 to 30,000 m 3 /h.

10. The system according to claim 6 , wherein the adsorbent unit comprises at least one replacement cartridge with adsorbent material.

11. The system according to claim 10 , wherein the replacement cartridge comprises 300 to 400 kg of adsorbent material.

12. The system according to claim 11 , wherein the adsorbent unit is designed for a nominal air flow of 10,000 to 30,000 m 3 /h.

13. The system according to claim 10 , wherein the adsorbent unit is designed for a nominal air flow of 10,000 to 30,000 m 3 /h.

14. The system according to claim 6 , wherein the adsorbent unit is designed for a nominal air flow of 10,000 to 30,000 m 3 /h.

Assignees

• Audi Ag

Inventors

• Müller-Hellwig Simone
• Seifert Hagen
• Krajete Alexander

Classifications

• B01D53/0415 Primary

  Beds in cartridges · 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

• C05C5/00

  Fertilisers containing other nitrates · CPC title

• B01D2253/108

  Zeolites · CPC title

• B01D2257/404

  Nitrogen oxides other than dinitrogen oxide · CPC title