A review of CO2 capture for amine-based deep eutectic solvents

Carbon Dioxide can be naturally produced and make up of 0.04 percent in the earth's atmosphere. However, centuries by centuries follows by the modernization of humans, it has escalated to the state of causing inimical impacts towards the human and environment. Additionally, one of the most important fuel sources in the world, natural gas, in its raw state contains high levels of CO₂ that must be removed to avoid issue such heating value reduction and pipeline corrosion concurrently reduces the effect towards environment. To tackle this issue, the development of CO₂ absorbent capable of absorbing large amount of CO₂ hence reducing the effects it has towards the environment has become a topic among researchers this past decades. Conventionally, the use of amine such as alkanolamine have been implemented to capture CO₂, yet it flaws outclass its uses such as limited ability to take up CO₂ and high corrosivity. Following this, ionic liquids (ILs), a new species of solvent, came to be in the limelight since they are tunable according to their function, including carbon capture. Nonetheless, in recent years, a newly discovered green solvent, deep eutectic solvent (DES) stole the limelight. This absorbent was claimed to retain all the advantages and desirable properties of ionic liquids while eliminating some of their greatest limitations. In this review, we examined the potential for carbon capture using multiple amine-based deep eutectic solvents and explored the role of including a third compartment as a performance enhancement mechanism. Last but not least, we are anticipating the publication of future species of amine-based deep eutectic solvents, which will include more information that had previously been considered scarce, such as its level of toxicity, its economic validation, and the evidence of melting point reduction.