Methods for dissolving target chemical species into absorbent liquids

A method for dissolving a target chemical species into an absorbent liquid, the method comprising:

• passing a mixed gas into a first chamber, the mixed gas comprising the target chemical species and at least one other chemical species;
• at least partially separating the target chemical species from the at least one other chemical species in the mixed gas by passing at least a portion of the target chemical species through a gas-selective membrane and into a second chamber, such that the second chamber comprises a concentrated gas, wherein the target chemical species in the concentrated gas in the second chamber has a greater concentration than the target chemical species in the mixed gas in the first chamber;
• selectively passing at least a portion of the target chemical species in the concentrated gas through a diffusion-based membrane and into a third chamber, wherein the third chamber comprises the absorbent liquid and the target chemical species dissolves in the absorbent liquid;
• and
• passing the target chemical species dissolved in the absorbent liquid out of the third chamber.