Electrodialytic separation of CO;gas from seawater
First Claim
1. A method comprising:
- flowing a process solution into a BPMED system with a BPMED apparatus having at least two compartments separated by membranes, wherein the process solution is one of a seawater solution, a brine or water that has absorbed gaseous CO2;
flowing an electrode rinse solution into the BPMED apparatus only across electrodes in the BPMED apparatus;
applying a voltage to the BPMED apparatus and the process solution is acidified and basified, and dissolved CO2 is generated in the acidified process solution;
flowing the acidified and basified process solution out of the BPMED apparatus;
desorbing the CO2 out of the acidified process solution;
combining the acidified and basified process solution such that the process solution is approximately neutral pH; and
discharging the process solution from the BPMED system.
6 Assignments
0 Petitions
Accused Products
Abstract
A method comprises flowing process solution and electrode solution into a BPMED apparatus, applying a voltage such that the process solution is acidified and basified and dissolved CO2 is generated, flowing the process solution out of the apparatus, and desorbing CO2 out of the process solution. A method for desorbing CO2 from an ocean comprises flowing seawater and electrode solution into a BPMED apparatus, applying a voltage such that dissolved CO2 is generated, flowing the seawater out of the apparatus, and desorbing CO2 out of the seawater. A method for producing a desalted solution and CO2 gas comprises flowing process solution and electrode solution into a BPMED apparatus that includes one or more three-compartment cells, applying a voltage such that the process solution is acidified, basified, and desalted, flowing the process solution out of the apparatus, and desorbing CO2 out of the process solution.
26 Citations
14 Claims
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1. A method comprising:
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flowing a process solution into a BPMED system with a BPMED apparatus having at least two compartments separated by membranes, wherein the process solution is one of a seawater solution, a brine or water that has absorbed gaseous CO2; flowing an electrode rinse solution into the BPMED apparatus only across electrodes in the BPMED apparatus; applying a voltage to the BPMED apparatus and the process solution is acidified and basified, and dissolved CO2 is generated in the acidified process solution; flowing the acidified and basified process solution out of the BPMED apparatus; desorbing the CO2 out of the acidified process solution; combining the acidified and basified process solution such that the process solution is approximately neutral pH; and discharging the process solution from the BPMED system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for producing a desalted solution and CO2 gas comprising:
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flowing a process solution comprised of one of seawater, a brine or water, wherein the process solution has absorbed gaseous CO2 into a BPMED system with a BPMED apparatus, wherein the BPMED apparatus includes a membrane stack comprised of one or more three-compartment cells; flowing an electrode rinse solution into the BPMED apparatus only across electrodes in the BPMED apparatus, the process solution and the electrode rinse solution being the only solutions used; applying a voltage to the BPMED apparatus such that the process solution is acidified, basified, and desalted; flowing the acidified, basified, and desalted process solution out of the BPMED apparatus; desorbing the CO2 out of the acidified process solution; combining the acidified and basified process solution such that the process solution is approximately neutral pH; and discharging the process solution from the BPMED system. - View Dependent Claims (14)
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Specification