Nicolas SCAGLIONE1, Agilio PADUA1, Margarida COSTA GOMES1
1ENS de Lyon, Lyon, France
The ever growing demand for energy urges for the development of new technologies to mitigate the rising global warming threat. In this alarming context, ionic liquids (ILs) appears as a promising way to chemically absorb the main greenhouse gases emitted.
A series of phosphonium carboxylate ILs, with different types of substituents linked to the anion, have been synthesized. Their physico-chemical properties as well as their CO2 capture capacity have been previously reported. Therefore, we decided to study the SO2 absorption as it is known to be an harmful acidic gas. Its absorption by reactive phosphonium carboxylate ILs has been thoroughly explored by experimental and in silico studies. The design of ILs paves the way for the preparation of efficient, readily synthesized absorbents for effective SO2 absorption with an enhanced absorption capacity at low pressures.