Due to their outstanding characteristics, ionic liquids (ILs) have gathered increasing interest during the last decade, for carbon dioxide (CO2) capture, both from academia as from industry. Despite their outstanding properties some limitations, mainly those related to transport properties [1], hinder their industrial application.
This work presents a novel material called encapsulated ionic liquids (ENILs), consisting of IL introduced into carbon submicrocapsules [2], capable of overcoming these known limitations and transport properties, placing ILs back as suitable solvents for Carbon Capture and Storage (CCS) on industrial applications. These ENILs contain 80%w/w of IL, but discretized in submicroscopic encapsulated drops,drastically increasing the surface contact area with respect to the neat fluid [3].
Solubility of CO2and N2 was studied through an isochoric solubility measurements in the (1-6) bar and (30-80) ºC pressure and temperature ranges,respectively. The influence of the type of IL and operating conditions were analyzed. Desorption of the studied gases, from the exhausted ENILs, was also studied at mild temperatures by using vacuum.
References:
[1] P.J. Carvalho,J.A.P. Coutinho. J. Phys. Chem. Lett. 2010, 1 (4), 774–80.
[2] N.Alonso-Morales, M.A. Gilarranz, J. Palomar, J. Lemus, F. Heras, J.J.Rodriguez. Carbon. 56, 2013, 430-8.
[3] J. Palomar, J.Lemus, J. Bedia, N. Alonso-Morales, M.A. Gilarranz, J.J. Rodriguez.Chem. Com. 48, 2012,10046-8.
