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1. WO2020159868 - SÉQUESTRATION CHIMIQUE DE CO2, DE NOX ET DE SO2

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

What is claimed is:

1. A method of chemically sequestering sulfur dioxide (SO2), nitrogen oxide (NO), nitrogen dioxide (NO2) and carbon dioxide (CO2) by a loop sequence, comprising:

a) providing a mixture of SO2, NO, NO2, CO2, sodium hypochlorite (NaOCl) sodium hydroxide (NaOH) and water (H2O) in the one or more second reaction chambers; b) reacting SO2 with NaOCl and H2O to generate sodium chloride (NaCl) and sulfuric acid (H2SO4) in the mixture;

c) reacting NO and NO2 with NaOCl and H2O to generate sodium nitrate (NaNO3) and hydrochloric acid (HCl) in the mixture;

d) reacting CO2 with NaOCl and H2O to generate hypochlorous acid (HOCl) and sodium bicarbonate ( NaHCO3) in the mixture;

e) reacting NO and NO2 with NaOH and NaOCl to generate sodium nitrite (NaNO2) and H2O in the mixture;

f) reacting CO2 with NaOH to provide NaHCO3 in the mixture;

g) adding an alcohol solvent to the mixture, forcing the generated NaCl NaHCO3 and Na2SO4 to precipitate, and removing the precipitate from the mixture;

h) removing the alcohol solvent from the mixture;

i) adding a dialkyl ketone solvent to the mixture, forcing the generated NaNO2, NaNO3 to precipitate, and removing the precipitate from the mixture;

j) removing the dialkyl ketone solvent from the mixture;

k) optionally adding NaOCl, NaOH and/or H2O to the mixture; and

l) adding SO2, NO, NO2 and CO2 to the mixture in the one or more second reaction chambers and reacting the mixture according to step b to complete the loop sequence.

2. The method of claim 1, wherein the alcohol solvent is methanol or tert-butanol; and the dialkyl ketone solvent is acetone.

3. The method of claim 1, wherein the mixture in the one or more reaction chambers is in an aqueous solution, an aqueous mist, or a gas phase.

4. The method of claim 1, wherein NaOCl, NaOH and H2O are introduced into the one or more reaction chambers as an aqueous solution or an aqueous mist.

5. The method of claim 1, further comprising providing a mixture of SO2, NO, NO2 and CO2 in the one or more reaction chambers, which facilitates a regulated exposure of this mixture as a gas or liquid stream to an aqueous mixture of NaOCl, NaOH and H2O or a dry powder mixture of NaOCl, and NaOH.

6. The method of claim 1, wherein the one or more reaction chambers causes an interaction between the mixture via a combination of gas/gas interaction, a gas/mist interaction, a gas/liquid interaction, liquid/mist or a liquid/liquid interaction.

7. The method of claim 6, wherein the gas/mist interaction includes interacting SO2, NO, NO2, CO2 gases with NaOCl, NaOH and H2O droplets using nozzles with or without mechanical droplet shear inducing enhancements.

8. The method of claim 6, wherein the gas/liquid interaction includes interacting SO2, NO, NO2, CO2 gases with NaOCl, NaOH and H2O solution using a bubble chamber or counter current packed bed scrubber, impingement plate tray tower scrubber or equal.

9. The method of claim 6, wherein the liquid/liquid interaction includes interacting SO2, NO, NO2, CO2 in a solution with NaOCl, NaOH and H2O in the solution using a static mixer or sonic mixer or equal.

10. The method of claim 1, wherein the optionally added NaOCl and NaOH is produced from electrochemical decomposition of NaCl into NaOH and Cl2 and a portion of the NaOH and Cl2 are combined to generate NaOCl, respectively.

11. A method of chemically sequestering carbon dioxide (CO2) by a loop sequence, comprising:

a) providing a mixture of CO2, lithium hydroxide (LiOH), sodium hydroxide (NaOH) or potassium hydroxide (KOH) and water (H2O) in one or more reaction chambers;

b) reacting CO2 with LiOH to generate lithium carbonate (Li2CO3) and water (H2O) in the mixture;

c) reacting Li2CO3 with NaOH or KOH to generate LiOH, and sodium carbonate (Na2CO3) or potassium carbonate (K2CO3) in the mixture;

d) reacting Na2CO3 or K2CO3 with CO2 and H2O to generate sodium bicarbonate (NaHCO3) or potassium bicarbonate (KHCO3) in the mixture;

e) adding an alcohol solvent to the mixture, forcing the generated NaHCO3 or KHCO3 to precipitate, and removing the precipitated NaHCO3 or KHCO3 from the solution;

f) removing the alcohol solvent from the mixture;

g) optionally adding NaOH or KOH, and/or H2O to the mixture; and

h) adding CO2 to the mixture in the one or more reaction chambers and reacting the mixture according to step b to complete the loop sequence.

12. The method of claim 11, wherein the alcohol solvent is tert-butanol or methanol,

13. The method of claim 11, wherein CO2 is introduced into the one or more reaction chambers as an aqueous solution, an aqueous mist, or a gas phase.

14. The method of claim 11, wherein the LiOH, NaOH or KOH are introduced into the one or more reaction chambers as an aqueous solution, an aqueous mist, or a dry powdered aerosol.

15. The method of claim 11, where CO2 is providedin the one or more reaction chambers, which facilitates a regulated exposure of CO2 as a gas or liquid stream to an aqueous mixture of LiOH, NaOH or KOH and H2O or a dry powder mixture of LiOH, NaOH or KOH.

16. The method of claim 11, wherein the one or more reaction chambers causes an interaction between the mixture via a combination of a gas/mist interaction, or a gas/liquid interaction, or a liquid/liquid interaction or a gas/aerosol powder interaction.

17. The method of claim 16, wherein the gas/mist interaction includes interacting CO2 gas with LiOH, NaOH or KOH, Na2CO3 or K2CO3 and H2O droplets using nozzles with or without mechanical droplet shear inducing enhancements.

18. The method of claim 16, wherein the gas/liquid interaction includes interacting CO2 gas with LiOH, NaOH or KOH, Na2CO3 or K2CO3 and H2O solution using a bubble chamber or counter current packed bed scrubber, impingement plate tray tower scrubber or equal.

19. The method of claim 16, wherein the liquid/liquid interaction includes interacting CO2 in a solution with LiOH, NaOH or KOH, Na2CO3 or K2CO3 and H2O in the solution using a static mixer or sonic mixer or equal.

20. The method of claim 11, wherein the optionally added NaOH or KOH is produced from electrochemical decomposition of NaCl or KCl into NaOH or KOH, respectively.

21. A system for chemically sequestering sulfur dioxide (SO2), nitrogen oxide (NO), nitrogen dioxide (NO2) and carbon dioxide (CO2), comprising:

a) one or more first reaction chambers for quenching/absorbing SO2, NO, NO2 and CO2 with water (H2O), hypochlorous acid (HOCl) solution or sodium hydroxide (NaOH) solution;

b) an electrochemical generator for reacting sodium chloride (NaCl) or potassium chloride (KCl) and H2O to generate NaOH or KOH, hydrogen (¾) and chlorine (Cl2), wherein NaOH or KOH reacts with Cl2 to generate sodium hypochlorite (NaOCl) or potassium hypochlorite (KOCl) and H2O;

c) one or more second reaction chambers for chemically sequestering SO2, NO, NO2 and CO2 by a loop sequence, wherein the generated NaOH or KOH, and NaOCl or KOCl are optionally fed into the one or more second reaction chambers; and

d) one or more third reaction chambers for chemically sequestering carbon dioxide (CO2) by another loop sequence, wherein the generated NaOH or KOH is optionally fed into the one or more third reaction chambers.

e) an aerosol conveying dry or moist LiOH granules or nano-granules that contact gas phase CO2 or CO2 dissolved/suspended in liquid droplets resulting in a reaction. The reaction product and excess reactants are subsequently captured in a mist or liquid that is ultimately recirculated in this process sequence.

f) devices to promote mass transfer of gas phase CO2, NOx and SO2 into to liquid phase. For example: droplets containing a reagent formed with or without mechanical/hydraulic shear, sprayed into a gas.

22. The system of claim 21, wherein chemically sequestering SO2, NO, NO2 and CO2 by a loop sequence comprises:

a) providing a mixture CO2, lithium hydroxide (LiOH), sodium hydroxide (NaOH) or potassium hydroxide (KOH) and water (H2O) in one or more reaction chambers;

b) reacting CO2 with LiOH to generate lithium carbonate (Li2CO3) and water (H2O) in the mixture;

c) reacting Li2CO3 with NaOH or KOH to generate LiOH, and sodium carbonate (Na2CO3) or potassium carbonate (K2CO3) in the mixture;

d) reacting Na2CO3 or K2CO3 with CO2 and H2O to generate sodium bicarbonate (NaHCO3) or potassium bicarbonate (KHCO3) in the mixture;

e) adding an alcohol solvent to the mixture, forcing the generated NaHCO3 or KHCO3 to precipitate, and removing the precipitated NaHCO3 or KHCO3 from the solution;

f) removing the alcohol solvent from the mixture;

g) optionally adding NaOH or KOH, and/or H2O to the mixture; and

h) adding CO2 to the mixture in the one or more reaction chambers and reacting the mixture according to step b to complete the loop sequence.

23. The system of claim 21, wherein chemically sequestering carbon dioxide (CO2) by a loop sequence comprises:

a) providing a mixture CO2, lithium hydroxide (LiOH), sodium hydroxide (NaOH) or potassium hydroxide (KOH) and water (H2O) in the one or more third reaction chambers; b) reacting CO2 with LiOH to generate lithium carbonate (Li2CO3) and water (H2O) in the mixture;

c) reacting Li2CO3 with NaOH or KOH to generate LiOH, and sodium carbonate (Na2CO3) or potassium carbonate (K2CO3) in the mixture;

d) reacting Na2CO3 or K2CO3 with CO2 and H2O to generate sodium bicarbonate (NaHCO3) or potassium bicarbonate (KHCO3) in the mixture;

e) adding an alcohol solvent to the mixture, forcing the generated NaHCO3 or KHCO3 to precipitate, and removing the precipitated NaHCO3 or KHCO3 from the solution;

f) removing the alcohol solvent from the mixture;

g) optionally adding NaOH or KOH, and/or H2O to the mixture; and

h) adding CO2 to the mixture in the one or more third reaction chambers and reacting the mixture according to step b to complete the loop sequence.