Supercritical fluid characteristics Supercritical fluid refers to substances whose temperature and pressure are above their critical point. The diffusivity of supercritical fluid is similar to that of gas, and it also has the solubility of liquid. Near its critical point, small changes in pressure and temperature will cause a large change in density, so that many characteristics of supercritical fluids can be "micro-controlled."
Supercritical extraction reaction system application
Supercritical fluids are excellent substitutes for organic solvents and are widely used in industry and laboratories. Supercritical carbon dioxide is the most commonly used supercritical fluid. The characteristics of supercritical fluids can be applied in the fields of supercritical extraction, synthesis of ultrafine particles and nanofilms, supercritical drying, carbon capture and storage, and enhanced oil recovery. The supercritical extraction reaction system manufactured by Parr can satisfy all the applications mentioned above at the same time.
The main components of Parr supercritical extraction reaction system
The reaction system in the figure mainly includes the following important components:
1) A reaction kettle with a volume of 1.2 liters, a pressure resistance of 4300 psig (300 bar) and a temperature resistance of 300 ° C; 1
2) Corresponding automatic air intake device and automatic back pressure valve to control the internal pressure of the reaction system;
3) Electric heater, power 1500W;
4) Controller, control heating and precisely regulate temperature; 4871
Feeding system: A pressure pump with a flow rate of 1.5 gallons per minute (5.7 lpm) can make the pressure of the carbon dioxide fluid reach 4000 psig (275 bar).
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