Hydrogen sulfide gas capture by organic superbase 1,8-diazabicyclo-[5.4.0]-undec-7-ene through salt formation: salt synthesis, characterization and application for CO₂ capture.

ABSTRACT: Hydrogen sulfide (H₂S) is a toxic and environment polluting gas like other acid gases and hence its capture and sequestration is equally important before release into the atmosphere. In this regard, solvent-based processes involving aqueous tertiary amine systems were extensively studied and used. Herein, in line with an analogous pathway, we report capture of H₂S gas in the form of its salt with an organic superbase such as 1,8-diazabicyclo-[5.4.0]-undec-7-ene (DBU) and the obtained salt was thoroughly studied. Spectroscopic analyses such as NMR and FTIR analyses confirmed that the H₂S molecule formed an ionic solid adduct with DBU through protonation of its sp²-hybridized N atom. The stability of formed [DBUH][SH] salt in aqueous solution as we

SUBMITTER: Khokarale SG 

PROVIDER: S-EPMC9080528 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature