Affiliation:
1. Faculty of Science and Engineering, Saga University, Honjo-machi, Saga, 840-8502, Japan
Abstract
Supercritical fluids (SCFs) are substances at a temperature and pressure that exceed the critical temperature (Tc) and critical pressure (pc). CO2 (Tc = 304.1 K, pc = 7.38 MPa) and H2O (Tc = 647.2 K, pc = 22.1 MPa) are frequently used as fluids in numerous technologies and research studies. These substances are thermally stable and inexpensive owing to their abundance in nature and have significant advantages in terms of industrial applications. CO2 can reach a supercritical state at moderate temperatures and pressures, and supercritical CO2 (SC-CO2) has been used for the extraction and separation of food, natural products, and pharmaceuticals since the 1980s. In this section, the fundamental properties of SCFs are introduced. Additionally, the dissolution behaviour and solvation structure of metal complexes in SC-CO2 are described with respect to extraction and separation.
Publisher
Royal Society of Chemistry