Search results
Results from the WOW.Com Content Network
A supercritical fluid (SCF) is a substance at a temperature and pressure above its critical point, ... Carbon dioxide pressure-temperature phase diagram Figure 2.
Carbon dioxide pressure-temperature phase diagram This video shows the property of carbon dioxide to go into a supercritical state with increasing temperature. Supercritical carbon dioxide (s CO 2) is a fluid state of carbon dioxide where it is held at or above its critical temperature and critical pressure.
It is called supercritical fluid. The common textbook knowledge that all distinction between liquid and vapor disappears beyond the critical point has been challenged by Fisher and Widom, [8] who identified a p–T line that separates states with different asymptotic statistical properties (Fisher–Widom line).
Supercritical liquid–gas boundaries are lines in the pressure-temperature (pT) diagram that delimit more liquid-like and more gas-like states of a supercritical fluid. They comprise the Fisher–Widom line , the Widom line , and the Frenkel line .
The pressure on a pressure-temperature diagram (such as the water phase diagram shown above) is the partial pressure of the substance in question. A phase diagram in physical chemistry , engineering , mineralogy , and materials science is a type of chart used to show conditions (pressure, temperature, etc.) at which thermodynamically distinct ...
In the context of the pressure-temperature phase diagram of a substance and of the supercritical fluid state in particular, the Widom line is a line emanating from the critical point which in a way extends the liquid-vapor coexistence curve above the critical point. It corresponds to the maxima or minima of certain physical properties of the ...
In thermodynamics, the Frenkel line is a proposed boundary on the phase diagram of a supercritical fluid, separating regions of qualitatively different behavior. [1] Fluids on opposite sides of the line have been described as "liquidlike" or "gaslike", and exhibit different behaviors in terms of oscillation, excitation modes, and diffusion.
Carbon dioxide phase diagram. Supercritical carbon dioxide blend (sCO 2 blend) is an homogeneous mixture of CO 2 with one or more fluids (dopant fluid) where it is held at or above its critical temperature and critical pressure.