Separation of Gas Mixtures by Transition-Metal Complexes.

摘要

The Pacific Northwest Laboratory (PNL) is examining transition-metal complexes as selective agents for the separation of syngas components from gas mixtures. Transition-metal complexes are known which react reversibly with gases such as H2 , CO, O2, and CO2. This reversible binding can be used to transfer the gas from a region of high partial pressure to a region of lower partial pressure. The selectivity of transfer is determined primarily by the selectivity of the metal in binding a specific gas. The nature of the ligands surrounding the metal has a large influence on the selectivity and reversibility and we have successfully used ligand modification to prepare complexes that have improved properties for H sub 2 or CO binding. Applications of metal complexes to gas separation and two specific examples of metal complexes under study will be discussed. 5 refs., 2 figs. (ERA citation 14:002751)