Solubility of CO2 and CH4 in Protic Amidium Bis(trifluoromethanesulfonyl)amide Ionic Liquids at 313.15 K

In this study, we investigated the CO2/CH4 selectivity of protic amidium ionic liquids (ILs) comprising bis­(trifluoromethanesulfonyl)­amide, N,N-dimethylformamidium ([DMFH]­[TFSA]), N,N-dimethylacetamidium ([DMAH]­[TFSA]), and N,N-dimethylpropionamidium ([DMPH]­[TFSA]). CO2 solubility was measured...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Journal of chemical and engineering data 2022-05, Vol.67 (5), p.1157-1163
Hauptverfasser: Watanabe, Masaki, Takahashi, Kota, Kodama, Daisuke, Makino, Takashi, Kanakubo, Mitsuhiro, Peters, Cornelis J.
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:In this study, we investigated the CO2/CH4 selectivity of protic amidium ionic liquids (ILs) comprising bis­(trifluoromethanesulfonyl)­amide, N,N-dimethylformamidium ([DMFH]­[TFSA]), N,N-dimethylacetamidium ([DMAH]­[TFSA]), and N,N-dimethylpropionamidium ([DMPH]­[TFSA]). CO2 solubility was measured at a temperature of 313.15 K and pressures up to 8.3 MPa using a static circulation-type apparatus, whereas CH4 solubility was measured at a temperature of 313.15 K and pressures up to 8.0 MPa using a magnetic suspension balance. The CO2 and CH4 solubility in the ILs exhibited typical pressure dependence as observed for physical absorbents. [DMFH]­[TFSA] exhibited a higher CO2 solubility and a lower CH4 solubility than [DMAH]­[TFSA] and [DMPH]­[TFSA]. CO2/CH4 selectivity was derived from the experimental solubility data. The protic amidium ILs presented herein exhibited higher CO2/CH4 selectivity than conventional physical absorbents such as Selexol and Rectisol.
ISSN:0021-9568
1520-5134
DOI:10.1021/acs.jced.1c00928