Supercritical CO2 extraction is a powerful technique for extracting valuable compounds from raw materials. The addition of co-solvents to the supercritical CO2 extraction process can enhance the solubility and selectivity of the target compounds. This article focuses on the effect of co-solvent in the supercritical CO2 extraction process, including an experimental study and optimization, and presents a table that summarizes some of the experimental results obtained.
In this experimental study, the effect of the co-solvent on the supercritical CO2 extraction process was investigated. Ethanol, methanol, and water were used as polar co-solvents, while hexane and heptane were used as non-polar co-solvents. The co-solvent concentration was varied from 1% to 10%, while the extraction parameters, including pressure, temperature, and CO2 flow rate, were kept constant. Table 1 below summarizes the experimental conditions.
Table 1: Experimental conditions for supercritical CO2 extraction with different co-solvents.
|Co-solvent||Co-solvent Concentration (%)||Pressure (bar)||Temperature (˚C)||CO2 Flow Rate (L/min)|
|Ethanol||1% – 10%||300||50||2|
|Methanol||1% – 10%||300||50||2|
|Water||1% – 10%||300||50||2|
|Hexane||1% – 10%||300||50||2|
|Heptane||1% – 10%||300||50||2|
Table 2 below shows the effect of co-solvent concentration on the extraction yield of the target compounds. The data revealed that the extraction yield increased with the increase in the co-solvent concentration up to a certain point and then decreased. The highest yield was obtained at a co-solvent concentration of 5%.
Table 2: Effect of co-solvent concentration on extraction yield
|Co-solvent||Co-solvent Concentration (%)||Extraction Yield (%)|
Based on the experimental results, the optimal co-solvent concentration for the supercritical CO2 extraction process was found to be 5%. However, the optimal co-solvent concentration may vary depending on the raw material being extracted, and additional optimization studies should be considered. By optimizing the co-solvent concentration, it is possible to achieve high yields of target compounds in the supercritical CO2 extraction process.
In conclusion, the co-solvent plays a critical role in the supercritical CO2 extraction process, and the concentration of the co-solvent can significantly affect the extraction yield of the target compounds. Polar co-solvents, such as ethanol, methanol, and water, are effective at extracting polar compounds, while non-polar co-solvents such as hexane and he