Related Experiment Video
Updated: May 11, 2026

A Dual-Functional Electroactive Filter Towards Simultaneously Sb(III) Oxidation and Sequestration
Published on: December 5, 2019
Reversible capture of SO2 through functionalized ionic liquids
Dezhong Yang1, Minqiang Hou, Hui Ning
1Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid and Interface and Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing, PR China.
Abstract:
Emission of SO2 in flue gas from the combustion of fossil fuels leads to severe environmental problems. Exploration of green and efficient methods to capture SO2 is an interesting topic, especially at lower SO2 partial pressures. In this work, ionic liquids (ILs) 1-(2-diethylaminoethyl)-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([Et2 NEMim][Tf2 N]) and 1-(2-diethylaminoethyl)-3-methylimidazolium tetrazolate ([Et2 NEMim][Tetz]) were synthesized. The performances of the two ILs to capture SO2 were studied under different conditions. It was demonstrated that the ILs were very efficient for SO2 absorption. The [Et2 NEMim][Tetz] IL designed in this work could absorb 0.47 g(SO2)g(IL)(-1) at 0.0101 MPa SO2 partial pressure, which is the highest capacity reported to date under the same conditions. The main reason for the large capacity was that both the cation and the anion could capture SO2 chemically. In addition, the IL could easily be regenerated, and the very high absorption capacity and rapid absorption/desorption rates were not changed over five repeated cycles.
Related Concept Videos
Ion Exchange
Preparation and Reactions of Sulfides
Sublimation
Preparation and Reactions of Thiols
Electrophilic Aromatic Substitution: Sulfonation of Benzene
Precipitation and Co-precipitation

