a Novel supported ionic liquid phase (SILP) gas purification materials have been developed to remove ammonia irreversibly from an ambient gas flow of nitrogen (1000 ppm NH 3 in N 2 , wet and dry). In the applied SILP materials, thin films of imidazolium based ionic liquids and ionic solutions of metal com-
Due
to the known corrosion and crystallization issues of LiBr/H2O, the state-of-the-art working pair in sorption heat pump
(SHP) systems, research into alternative working pairs is of high
practical relevance. We have studied a wide range of ionic liquids
(ILs) for this application in order to find potential new systems
with enhanced performance. The screening was conducted with a focus
on vapor pressure measurements of, in total, 74 examined working pairs.
As common vapor–liquid-equilibrium measurements are very precise
but rather time-consuming, we developed a new setup allowing a fast
relative determination of humidities with very small sample volumes
for screening purposes. By this method we identified seventeen IL/H2O working pairs fulfilling the technical relevant criterion
of a water vapor pressure p
H2O ≤ 10 mbar at T = 308 K with an IL content
of less than 80 wt % (w
IL < 0.8). Further
evaluation of these candidates with respect to their thermal stability
and viscosity allowed us to identify [MMIM][HCOO]/H2O,
[MMIM][OAc]/H2O, [MMIM][C2H5COO]/H2O, [Me4N][HCOO]/H2O, [Me4N][OAc]/H2O and [Me4N] [C2H5COO]/H2O as the most promising IL/H2O systems for a possible application in SHP systems.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.