Activity replenishment and in situ activation for enzymatic co2 capture packed reactor

A method for CO2 capture, comprising:

• a) operating a packed reactor comprising a reaction chamber containing packing comprising immobilized enzymes, by contacting a CO2 containing gas with a liquid solution in the reaction chamber to produce an ion-loaded solution and a CO2 depleted gas by an enzymatically catalyzed hydration reaction;
• b) monitoring enzyme activity of the immobilized enzymes;
• c) at a low enzyme activity threshold:
• i) stopping operation in the packed reactor;
• and
• ii) replenishing the enzymatic activity by removing the packing and replacing with new packing comprising active immobilized enzymes;
• and
• d) recommencing operation in the packed reactor for CO2 capture using the replenished immobilized enzymes.

A method for desorption of an ion-loaded solution, comprising:

• a) operating a desorption reactor comprising packing with immobilized enzymes to produce a regenerated solution and a CO2 gas by an enzymatically catalyzed dehydration reaction;
• b) monitoring enzyme activity of the immobilized enzymes;
• c) at a low enzyme activity threshold:
• i) stopping operation in the desorption reactor;
• and
• ii) replenishing the enzymatic activity by removing the packing and replacing with new packing comprising active immobilized enzymes;
• and
• e) recommencing operation in the desorption reactor for CO2 desorption using the replenished immobilized enzymes.

A method for in situ activation of a packed reactor comprising packing for enzymatic CO2 capture, comprising:

• providing at least one enzyme activation solution comprising enzymes into the packed reactor to contact the packing;
• coating the enzyme activation solution onto the packing to form a wet coating;
• and
• curing the wet coating to provide an activating amount of the enzymes immobilized with respect to the packing.

A system for CO2 capture, comprising:

• a packed reactor comprising:
• a reaction chamber containing packing comprising immobilized enzymes;
• a gas inlet for receiving a CO2 containing gas;
• a liquid solution for receiving a liquid absorption solution into the reaction chamber;
• a liquid outlet for releasing an ion-loaded solution;
• and
• a gas outlet for releasing a CO2 depleted gas;
• an in situ enzyme supply device for supplying active enzyme to the reaction chamber in order to replenish the enzymatic activity within the reactor.