Study on the Supercritical Carbon Dioxide Extraction of Onion Oil
Student’s name:YU Hao-feng Advisor:YE Chun-ling
(School of Biological and Chemical Engineering Zhejiang University of Science and Technology)
Abstract: Onion oil were extracted by supercritical CO2 fluid. Different state of onions, which, dried onion powder, freeze-dried onion powder, fresh onion, were used. The effect of extraction pressure, extraction temperature, extraction time and amount of cosolvent on the yield of onion oil, was determined. The results showed that the optimom technological contition were freeze-dried onion powder, added 15% ethanol as cosolvent, extraction pressure of 28MPa, extraction temperature 42℃, extraction time 216 min, with onion oil yield of 0.483%.
