Metal chloride anion based ionic liquids: synthesis, characterization and evaluation of performance in hydrogen sulfide oxidative absorption

Abstract

Three metal chloride anion based ionic liquids (MCABILs) were synthesized and characterized for high conversion of hydrogen sulfide (H2S).

Latest technological advances and insights into capture and removal of hydrogen sulfide: a critical review

“…26,79,80 ILs possess various intrinsic properties such as good thermal stability, tunable viscosity and miscibility with organic solvents and water, as well as good extractability for various metal ions and organic compounds, which are highly dependent on their special structures. 81 ILs possess an extremely low or negligible vapor pressure because ILs have charged anions and cations that are held very strongly by coulombic interactions and are very difficult to break. This causes ILs to have a very low vapor pressure and remain in the liquid state without evaporating, even at high temperatures up to 400 °C.…”

“…This is because regenerable ILs produce minimal or zero waste as compared to their desired products. 81,403,404 Their high regenerability contributes to efficient H 2 S removal, enabling multiple uses over a certain period. Emphasizing the high regenerability of materials used in other methods is essential to minimize e-factors.…”

Gallium(III)- and Indium(III)-Containing Ionic Liquids as Highly Active Catalysts in Organic Synthesis

“…Other ILs tested by the authors which contained Fe(III) or Sn(II) showed even better performance, reaching conversions up to 97%. Nevertheless, the presented studies showed that ILs based on metal chlorides can also be efficient tools in gas purification processes [ 104 ].…”