Co 2 mineralization in produced and industrial effluent water by ph-swing carbonation

Patent metadata

Field	Value
Publication number	US-2022212935-A1
Application number	US-202117552194-A
Country	US
Kind code	A1
Filing date	Dec 15, 2021
Priority date	Jun 30, 2017
Publication date	Jul 7, 2022
Grant date	—

Abstract

Effluent water is combined with carbon dioxide sourced from a carbon dioxide-containing emission stream to produce a reaction solution. The pH of the reaction solution is controlled to induce precipitation of a carbonate salt from the reaction solution.

First claim

What is claimed is:

1 . A method comprising:
combining effluent water with carbon dioxide sourced from a carbon dioxide-containing emission stream to produce a reaction solution; and controlling the pH of the reaction solution to induce precipitation of a carbonate salt from the reaction solution.

2 . The method of claim 1 , wherein controlling the pH includes increasing the pH of the reaction solution.

3 . The method of claim 1 , wherein controlling the pH includes adjusting the pH of the reaction solution to 6 or greater.

4 . The method of claim 1 , wherein controlling the pH includes adjusting the pH of the reaction solution to 6.5 or greater.

5 . The method of claim 1 , wherein controlling the pH includes introducing a pH buffer agent in the reaction solution.

6 . The method of claim 5 , wherein the pH buffer agent is a heterogeneous buffer agent.

7 . The method of claim 6 , further comprising, subsequent to the precipitation of the carbonate salt, recovering the heterogeneous buffer agent by filtration.

8 . The method of claim 1 , wherein the carbon dioxide-containing emission stream is a flue gas stream.

9 . A method comprising:
combining effluent water with carbon dioxide sourced from a carbon dioxide-containing emission stream to produce a reaction solution; and inducing precipitation of a carbonate salt from the reaction solution in the presence of a pH buffer agent.

10 . The method of claim 9 , wherein the pH buffer agent is a heterogeneous buffer agent.

11 . The method of claim 10 , wherein the heterogeneous buffer agent is a polymer-supported buffer agent.

12 . The method of claim 10 , wherein the heterogeneous buffer agent is a clay to support ion exchange reaction.

13 . The method of claim 10 , further comprising, subsequent to the precipitation of the carbonate salt, recovering the heterogeneous buffer agent by filtration.

14 . The method of claim 9 , wherein inducing the precipitation of the carbonate salt includes controlling the pH of the reaction solution using the pH buffer agent.

15 . The method of claim 9 , wherein the carbon dioxide-containing emission stream is a flue gas stream.

Assignees

• Univ California

Inventors

• Sant Gaurav N
• Kweon Hyukmin
• Callagon La Plante Erika
• Simonetti Dante Adam

Classifications

• C01B32/60 Primary

  Preparation of carbonates or bicarbonates in general (of percarbonates C01B15/10; of specific carbonates or bicarbonates according to the cation C01B-C01G) · CPC title

• B01D53/78

  with gas-liquid contact · CPC title

• B01D2252/103

  Water · CPC title

• B01D53/1475

  Removing carbon dioxide · CPC title

• B01D53/62

  Carbon oxides · CPC title