Biocompatible ammonium-based ionic liquids/ZIF-8 composites for CO2/CH4 and CO2/N2 separations

The development of sorbent materials with high carbon dioxide (CO2) selectivity is vital importance to minimize the impact global warming by separating and capturing this major greenhouse gas. In work, for first time five ammonium-based ionic liquids (ILs) were impregnated into metal-organic framework (MOF) ZIF-8 gas sorption applications. Characterization results showed that produced [email protected] composites are thermally stable microporous nature. IL impregnation was successfully accomplished did not affect crystalline structure ZIF-8. Sorption-desorption equilibrium isotherms different gases, including CO2, methane (CH4) nitrogen (N2) measured at 303 K pristine MOF composites. Given careful choice ILs, anion cation effects studied in terms their on capacity performance each composite. Acetate-based CO2 when compared ZIF-8; specifically, composite [N2 1 4][Ac]@ZIF-8 51% increase, bar flue conditions. Because good CO2/N2 acetate-based composites, sorption-desorption above-mentioned gases also 323 K, along Ideal selectivities thus calculated study temperature materials. It can be observed higher temperature, less selective are. Nevertheless, ZIF-8, 56% Finally, isosteric heats adsorption ILs revealing all physisorbed three