supercritical fluid state
Quick Summary
A supercritical fluid exists beyond a substance's critical temperature and pressure, where the distinction between liquid and gas disappears. In this state, the fluid is as dense as a liquid but flows with the viscosity of a gas. This unique combination of properties allows supercritical fluids to dissolve substances effectively, acting as a better solvent than a gas but with lower viscosity than a liquid.12
Supercritical fluids have practical applications, such as in supercritical-fluid extraction (SFE) for purifying complex materials and removing substances like caffeine from coffee. They are also used in supercritical carbon dioxide turbines, which offer compact designs and improved performance compared to traditional steam turbines due to the fluid's high density and ability to transfer more energy.123
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- separation and purificationSeparations based on equilibria
A supercritical fluid is a phase that occurs for a gas at a specific temperature and pressure such that the gas will no longer condense to a liquid regardless of how high the pressure is raised. It is a state intermediate between a gas and a…
Read MoreA supercritical fluid is a phase that occurs for a gas at a specific temperature and pressure such that the gas will no longer condense to a liquid regardless of how high the pressure is raised. It is a state intermediate between a gas and a…
Read More - separation and purificationSupercritical-fluid methods
Gaseous substances beyond a specific temperature and pressure (the critical point) become a supercritical fluid, a state that is more dense than a gas but less dense than a liquid. A supercritical fluid can thus dissolve (i.e., solvate) species better than a gas…
Read MoreGaseous substances beyond a specific temperature and pressure (the critical point) become a supercritical fluid, a state that is more dense than a gas but less dense than a liquid. A supercritical fluid can thus dissolve (i.e., solvate) species better than a gas…
Read More - chromatographyApplications
…scale range are amenable to supercritical-fluid separations. Size-exclusion methods are involved at molecular weights above 1,000. Field-flow fractionation extends the size range to colloids and microscopic particles.
Read More…scale range are amenable to supercritical-fluid separations. Size-exclusion methods are involved at molecular weights above 1,000. Field-flow fractionation extends the size range to colloids and microscopic particles.
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