The physical meaning of a supercritical fluid is that as long as a fluid is in the supercritical region, it will not undergo a phase transition between liquid and gas and no meniscus separating liquid and gas will be observed. Technically speaking, a substance in its supercritical state is neither a liquid nor a gas, but rather a fluid. The technological advantage of a supercritical fluid is that it cannot turn into a two-phase mixture of liquid and gas.
https://www.cryogenicsociety.org/resources/defining_cryogenics/supercritical_fluids/
Volatile liquids and solids, or liquids and solids with a high vapor pressure or low boiling point, are soluble in gas. It becomes especially easy to dissolve liquids and solids such as these in a supercritical fluid because of the high density. As can be noted from the Mole Fraction Solubility. The Mole Fraction Solubility is simply the ratio of the sublimation (or vapor pressure) to the total gas pressure.
https://chem.libretexts.org/Core/Physical_and_Theoretical_Chemistry/Physical_Properties_of_Matter/States_of_Matter/Supercritical_Fluids
solvent power at low densities (temperature near or highercritical temperature and pressure. lower critical pressure). 2. Carbon dioxide and other fluids. Carbon dioxide : CO2 is a very attractive supercritical fluid for many reasons : -- very cheap and abundant in pure form (food grade) worldwide ;
http://www.futurechemtech.com/data/What%20is%20a%20Supercritical%20Fluid.pdf
Supercritical Fluids. This article, written by Dr. John Weisend, was originally published in the Volume 32 Number 3 issue of Cold Facts as part of his series, Defining Cryogenics. A supercritical fluid is defined as a substance whose temperature and pressure exceed those of its critical point.
https://www.cryogenicsociety.org/resources/defining_cryogenics/supercritical_fluids/
While not truly supercritical, these fluids are a far way from the liquid-vapor transition line and will remain single phase as long as low temperatures and high pressures are maintained. As a result, the fluids also avoid issues associated with two-phase systems. There are many examples of such systems.
https://www.cryogenicsociety.org/resources/defining_cryogenics/supercritical_fluids/
Supercritical fluids have the low viscosity of a gas and the high density of a liquid, making it impossible to liquefy the matter using any amount of pressure. However, it is possible to go from a gas to a liquid without crossing the boundary between the vapor and liquid phase using a supercritical fluid just by lowering the temperature of the liquid (Observe phase diagram below).
https://chem.libretexts.org/Core/Physical_and_Theoretical_Chemistry/Physical_Properties_of_Matter/States_of_Matter/Supercritical_Fluids
1. Definition. Supercritical Fluid: Fluid over its critical temperature and pressure, exhibiting good solvent. power ; in most applications,carbon dioxide is used pure or added with aco-solvent ; the. main interest of supercritical fluids is related to their tunable ” properties, that can be“.
http://www.futurechemtech.com/data/What%20is%20a%20Supercritical%20Fluid.pdf
What is a Supercritical Fluid ? 1. Definition Supercritical Fluid: Fluid over its critical temperature and pressure, exhibiting good solvent power ; in most applications,carbon dioxide is used pure or added with aco-solvent ; the main interest of supercritical fluids is related to their tunable ” properties, that can be“ changed easily by monitoring pressure and temperature : good solvent power at high densities (temperature nearcritical temperature and pressure muchover critical pressure) to very low
http://www.futurechemtech.com/data/What%20is%20a%20Supercritical%20Fluid.pdf
Supercritical Fluids This article, written by Dr. John Weisend, was originally published in the Volume 32 Number 3 issue of Cold Facts as part of his series, Defining Cryogenics. A supercritical fluid is defined as a substance whose temperature and pressure exceed those of its critical point. Every pure substance has a critical point that is defined in thermodynamic space by a critical temperature and a corresponding critical pressure.
https://www.cryogenicsociety.org/resources/defining_cryogenics/supercritical_fluids/
Supercritical Fluids. Matter can be pushed to temperatures and pressures beyond those of its critical point. This stage is characterized by the inability to distinguish whether the matter is a liquid or a gas, as a result, Supercritical fluids (SCF) do not have a definite phase.
https://chem.libretexts.org/Core/Physical_and_Theoretical_Chemistry/Physical_Properties_of_Matter/States_of_Matter/Supercritical_Fluids
supercritical liquids definition
A supercritical fluid is defined as a substance whose temperature and pressure exceed those of its critical point.