Abstract
Several amino acid anion (aminate) based ionic liquids (ILs) were synthesized, characterized and tested for CO2 absorption capacity. Butylmethyl imidazolium ([bmim]+) was chosen as the cation for all the ILs studied. Among all the aminate-ILs studied, arginate anion ([ARG]) IL has shown more CO2 absorption capacity followed by lysinate ([LYS]) and histidinate ([HIS]) in terms of mol CO2/mol IL. The high CO2 absorption capacity of [ARG] anion was attributed to the availability of more accessible amine (N) groups. The CO2 molar uptake in aminate-ILs studied is in the order of [ARG] (4N)>[LYS] (2N)>[HIS] (3N)>[MET] (1N)>[LEU] (1N)>[GLY] (1N)>[VAL] (1N)>[ALA] (1N)>[PRO] (1N). The FTIR of the CO2 absorbed aminate-ILs confirms the chemical absorption of CO2 through the formation of carbamate species. The aminate-ILs showed higher CO2 solubility compared to amine functionalized cation ILs and non-functionalized ILs. On mass basis (gCO2/kg IL), aminate-ILs showed 70% more CO2 absorption capacity than primary amine-cation ILs, 150% more than tertiary amine-cation ILs and 600% more than non-functionalized ILs.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
