Electrochemical carbon dioxide converter and liquid regenerator

1. A carbon dioxide conversion system for an environment, comprising:

a first gas-liquid contactor-separator downstream of the environment;

an electrochemical conversion cell downstream of the first gas-liquid contactor-separator, the electrochemical conversion cell configured to discharge CO and H2 to a CO methanation reactor; and

a cleaned ionic liquid storage intermediate the first gas-liquid contactor-separator and the electrochemical conversion cell.

2. The system of claim 1 , wherein the environment is closed to ambient gas.

3. The system of claim 1 , wherein the first gas-liquid contactor-separator comprises a hollow fiber membrane bundle.

4. A carbon dioxide conversion system for an environment closed to ambient gas, comprising:

a scrubber downstream of the environment;

an electrochemical conversion cell downstream of the scrubber, the electrochemical conversion cell configured to discharge CO and H2 to a CO methanation reactor; and

an ionic liquid storage intermediate the scrubber and the electrochemical conversion cell;

wherein the scrubber is configured to receive gas containing carbon dioxide from the environment, receive cleaned liquid absorbent from the ionic liquid storage, and discharge carbon dioxide-depleted gas to the environment.

5. The system of claim 4 , wherein the scrubber is a gas-liquid contactor-separator.

6. The system of claim 4 , wherein the scrubber is further configured to discharge used liquid absorbent to the electrochemical conversion cell.

7. The system of claim 4 , wherein the electrochemical conversion cell is configured to discharge cleaned liquid absorbent to the ionic liquid storage.

8. The system of claim 4 , wherein the electrochemical conversion cell is configured to discharge O2 to the environment.

9. The system of claim 4 , further comprising a plurality of electrochemical conversion cells.