Exceptionally effective <scp> H <sub>2</sub> S </scp> absorption and conversion into thiols in novel superbase protic ionic liquids
Ping Liu, Kaixing Cai, Mao Liu, Fei Liu, Peng Chen, Tianxiang Zhao
Abstract
Abstract We demonstrate an effective strategy for capture and conversion of H 2 S in novel superbase protic ionic liquids (SPILs). It is found that the synthesized SPILs with the multiple active sites exhibit the unprecedented H 2 S uptake via chemical absorption (up to 1.81 mol mol −1 at 298.2 K and 1 bar). More importantly, H 2 S molecule is activated by these SPILs during the absorption process, so that the activated H 2 S can be converted further into high value‐added thiols in situ with excellent yields under mild conditions (303.2 K and 1 bar) without any solvents and metallic catalysts. Since H 2 S‐saturated SPILs can be regenerated by chemical conversion of absorbed H 2 S into thiols, thereby eliminating the higher input of energy consumption during the process of H 2 S stripping. This SPIL‐mediated scheme provides an alternative approach for the capture and chemical conversion of H 2 S.