What is Supercritical CO2?

Supercritical CO2 is carbon dioxide (CO2) in a state where it exists as both a liquid and gas, typically at pressures above 73.8 bar and temperatures above 31.1°C. In this supercritical state, CO2 has unique properties that make it an excellent solvent for a variety of substances.

Properties of Supercritical CO2

Supercritical CO2 exhibits properties of both gases and liquids. It can penetrate solid materials like a gas but also dissolve compounds like a liquid. This behavior makes it ideal for use as a working fluid in extraction processes. Some of its key properties include:

• Density: The density of supercritical CO2 can be adjusted by changing the pressure and temperature, making it highly versatile for different applications.

• Viscosity: Supercritical CO2 has a low viscosity, allowing it to flow easily and extract compounds from raw materials.

• Non-toxic and Environmentally Friendly: CO2 is non-toxic, and since it is a naturally occurring gas, it is environmentally friendly and can be recycled in most extraction processes.

Supercritical CO2 as a Working Fluid in Extraction

In extraction processes, supercritical CO2 is used as a solvent to extract essential oils, cannabinoids, and other valuable compounds. The fluid can penetrate plant materials and extract compounds effectively, making it ideal for producing clean, pure extracts.

Applications of Supercritical CO2

Supercritical CO2 is used in a wide range of industries, including:

• Cannabis Extraction: CO2 is commonly used to extract cannabinoids like THC and CBD from cannabis plants.

• Essential Oil Extraction: Supercritical CO2 is used to extract essential oils from herbs and flowers without compromising their delicate compounds.

• Food and Beverage Industry: CO2 is used to extract flavors and colors from food ingredients.

Conclusion

Supercritical CO2 is a versatile working fluid with unique properties that make it ideal for various extraction processes. Its ability to act as both a gas and a liquid allows it to extract compounds efficiently while maintaining safety and environmental sustainability.

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