Imperial College London

Professor Tom Welton

Faculty of Natural SciencesDepartment of Chemistry

Professor of Sustainable Chemistry



+44 (0)20 7594 5763t.welton Website




601AMolecular Sciences Research HubWhite City Campus






BibTex format

author = {Tome, LC and Gouveia, ASL and Ab, Ranii MA and Lickiss, PD and Welton, T and Marrucho, IM},
doi = {10.1021/acs.lecr.6b04661},
journal = {Industrial & Engineering Chemistry Research},
pages = {2229--2239},
title = {Study on Gas Permeation and CO2 Separation through Ionic Liquid Based Membranes with Siloxane-Functionalized Cations},
url = {},
volume = {56},
year = {2017}

RIS format (EndNote, RefMan)

AB - This work explores ionic liquid-based membranes with siloxane functionalized cations using two different approaches: supported ionic liquid membranes (SILMs) and poly(ionic liquid)–ionic liquid (PIL–IL) composite membranes. Their CO2, CH4, and N2 permeation properties were measured at T = 293 K with a trans-membrane pressure differential of 100 kPa. The thermophysical properties of the synthesized siloxane-functionalized ILs, namely viscosity and density (data in the Supporting Information), were also determined. Contrary to what was expected, the gas permeation results show that the SILMs containing siloxane-functionalized cations have CO2 permeabilities that are lower than those of their analogues without the siloxane functionality. The addition of siloxane-based ILs into PILs increases both CO2 permeability and CO2/N2 permselectivity, although it does not significantly change the CO2/CH4 permselectivity. The prepared membranes present very diverse CO2 permeabilities, between 57 and 568 Barrer, while they show permselectivities varying from 16.8 to 36.8 for CO2/N2 and from 9.8 to 11.5 for CO2/CH4. As observed for other ILs, superior CO2 separation performances were obtained when the IL containing [C(CN)3]− is used compared to that having the [NTf2]− anion.
AU - Tome,LC
AU - Gouveia,ASL
AU - Ab,Ranii MA
AU - Lickiss,PD
AU - Welton,T
AU - Marrucho,IM
DO - 10.1021/acs.lecr.6b04661
EP - 2239
PY - 2017///
SN - 0888-5885
SP - 2229
TI - Study on Gas Permeation and CO2 Separation through Ionic Liquid Based Membranes with Siloxane-Functionalized Cations
T2 - Industrial & Engineering Chemistry Research
UR -
UR -
UR -
VL - 56
ER -