Solvents for CO2 Capture
Project No.: R&D 048
The most attractive physical solvents for carbon dioxide (CO2) capture are those having such properties as high thermal stability, extremely low vapor pressures, nonflammability, and nontoxicity. Such materials not only have the potential to capture CO2 with minimal solvent loss in the gas stream but are expected to be environmentally benign. NETL's Office of Research and Development is conducting a study involving one general type of solvent—ionic liquids—with these physical properties. The results of that study will serve as the basis for development of a new CO2 capture technology.
The overall objective of this research is to develop and test physical solvents to selectively capture CO2 from high temperature fuel gas streams, containing CO2, CO, H2S, H2O, and H2 like those found in IGCC systems after the low temperature water-gas shift reactor.
|CO2 solubility isotherm from molecular modeling.