Process of Ionic Liquids as Solvents

2019-02-22 23:21:30 adman 13

Monils Ionic Liquids | Monils Chemical Engineering Science & Technology (Shanghai) co., Ltd

A typical amine gas treating process flow diagram. Ionic liquids for use in CO2 capture by absorption could follow a similar process.

A typical CO2 absorption process consists of a feed gas, an absorption column, a stripper column, and output streams of CO2-rich gas to be sequestered, and CO2-poor gas to be released to the atmosphere. Ionic liquids could follow a similar process to amine gas treating, where the CO2 is regenerated in the stripper using higher temperature. However, ionic liquids can also be stripped using pressure swings or inert gases, reducing the process energy requirement.[3] A current issue with ionic liquids for carbon capture is that they have a lower working capacity than amines. Task-specific ionic liquids that employ chemisorption and physisorption are being developed in an attempt to increase the working capacity. 1-butyl-3-propylamineimidazolium tetrafluoroborate is one example of a TSIL.[2]