CO2 removal from gas using ionic liquid absorbents

摘要

A process and method for separating CO₂ from a gaseous stream such as natural gas. An ionic liquid comprising an anion having a carboxylate function and an effective amount of water is used as an adsorbent to selectively complex the CO₂ yielding a gaseous stream with a greatly reduced CO₂ content. The ionic liquid can then be readily be regenerated and recycled.