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Supercritical CO2 extraction of black pepper essential oil

About black pepper essential oil extraction experiment

A company in Guangdong, China released the results of a study on supercritical CO2 extraction of black pepper essential oil, probably in 2012.

They studied the effects of CO2 flow rate, extraction pressure, extraction time and extraction temperature on the supercritical CO2 extraction of black pepper essential oil. With black pepper essential oil yield as an indicator, the extraction conditions were optimized by orthogonal test methods.

Result shows

The best extraction conditions for black pepper essential oil are: black pepper particle size 20 mesh, CO2 flow rate 22kg/h, extraction pressure 34MPa, extraction time 140min, extraction temperature 38℃, under these conditions, the yield of black pepper essential oil is 7.02%.

How to extract black pepper oil with supercritical CO2

Supercritical CO2 extraction process for essential oil of black pepper

Black pepper → drying and crushing → sieving (20 mesh) → installing in the extractor → controlling CO2 flow → setting pressure, temperature and time → collecting essential oil.

Analysis of CO2 Extraction Technology of Black Pepper Essential Oil

The extraction pressure, extraction temperature, extraction time and CO2 flow rate are selected as the investigation factors, and the extraction orthogonal experiment is carried out to investigate the various parameters of the supercritical extraction process, and the extraction yield is an indicator.

Effect of CO2 flow rate on extraction yield of black pepper essential oil

Black pepper essential oil extraction process conditions

Extraction pressure 350MPa, temperature 40℃, extraction time 120min

Effect of different CO2 flow rate on extraction yield of black pepper essential oil

If the flow rate increases, the extraction yield of black pepper essential oil per unit time will increase, but if the flow rate is too large, it is not conducive to the recovery of black pepper essential oil

In the test results of supercritical CO2 extraction of black pepper essential oil, the best CO2 flow rate is 22kg/h.

Effect of extraction pressure on extraction yield of black pepper essential oil

Black pepper essential oil extraction process conditions:

Temperature 40℃, extraction time 120min, CO2 flow rate is 22kg/h

The effect of different extraction pressures on the extraction yield of black pepper essential oil.

With the increase of pressure, the yield of black pepper essential oil also increases. When the extraction pressure is 34MPa, the yield reaches the maximum value of 6.46%. Continue to increase, but the yield will decrease,

Therefore, it is appropriate to use supercritical CO2 to extract the black pepper essential oil at an extraction pressure of 34MPa.

Effect of extraction time on extraction yield of black pepper essential oil

Black pepper essential oil extraction process conditions


Temperature 40℃, CO2 flow rate is 22kg/h, extraction pressure is 34MPa

Effect of Different Extraction Time on the Extraction Yield of Black Pepper Essential Oil

With the extension of the extraction time, the yield of black pepper essential oil gradually increased, but after the extraction time was 120 minutes, if the extraction time continued to be extended, the extraction yield increased little.

The optimal extraction time is 120min.

Effect of extraction temperature on extraction yield of black pepper essential oil


Black pepper essential oil extraction process conditions

The extraction time is 120min, the CO2 flow rate is 22kg/h, and the extraction pressure is 34MPa

Effect of different extraction temperatures on the extraction yield of black pepper essential oil

The yield of black pepper essential oil first increased with the increase in temperature, reaching the maximum at 42°C, and the temperature continued to rise, but the yield of essential oil decreased.
The best temperature is 42°C.

Best CO2 extraction process of black pepper essential oil


Based on the single factor test, select the optimal test range of CO2 flow rate, extraction pressure, extraction time, and extraction temperature. According to the yield of black pepper essential oil, determine the best extraction conditions for black pepper essential oil

The sequence of factors affecting the yield of black pepper essential oil is:
CO2 flow rate>extraction temperature>extraction pressure>extraction time; the best extraction conditions are: CO2 flow rate is 22kg/h, extraction pressure is 34MPa, extraction time is 140 minutes, and extraction temperature is 38°C. Under these conditions, the yield of black pepper essential oil is 7. 02%.