New Solvents for CO2 and H2S Removal from Gaseous Streams

Acid gas removal from gaseous streams such as flue gas, natural and biogas is mainly performed by chemical absorption with amines, but the process highly energy intensive can generate emissions of harmful compounds to atmosphere. Considering emerging interest in carbon capture, associated increasing environmental concerns, there much current effort develop innovative solvents able lower impact acid processes. To be competitive, new blends must show a CO2 uptake capacity comparable one traditional MEA benchmark solution. In this work, review state art attractive alternative amine blend for presented. These novel are classified into three main classes: biphasic blends—involving formation two liquid phases, water-lean green solvents. For each solvent, peculiar features, level technological development expected pros cons discussed. At end, summary on most promising perspectives major limitations provided.